Re: [Emc-users] Beam Stiffening?

[Ralph Stirling via Emc-users]

Can you run a steel cable through it and tension it?  Might stiffen it up some.

-- Ralph

On May 13, 2024 1:46 PM, Todd Zuercher via Emc-users 
 wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Anyone have any brilliant ideas to stiffen a woefully inadequate cross beam on 
a gantry router without adding too much mass?  What is there now is a 4" x 8" 
rectangular 3/8" walled extrusion that is 145" long.

Under normal jogging commands the two servos control the ends of this gantry 
reasonably well, but while the axis is homing the thing shakes and wobbles 
terribly bad.  Also If I put a dial indicator in the center of the bridge and 
hit the bridge forward or backward it will flex and wobble enough to displace 
the dial indicator +/-0.03 and it takes nearly a dozen wobbles to dampen it.  
But on the ends the servo's only have a few thousandths of give.

I'm less concerned about the actual stiffness and more worried about dampening 
the wobble.

Todd Zuercher
P. Graham Dunn 
Inc.>
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031


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Re: [Emc-users] Carving a spiral

[Ralph Stirling via Emc-users]

Use the parametric equation of a spiral and compute it *inside* your
g-code program.

x(t) = c1 * t * cos(t) + x0
y(t) = c2 * t * sin(t) + y0

Choose as fine a step as you like for t and make a while
loop to generate the x and y values and do G1 moves.

See 
https://www.math.fsu.edu/~cstover/teaching/fa16_2312/handouts/parametric/ParamGraphs.pdf
for example (p. 2 and 3).

-- Ralph

From: Chris Albertson [albertson.ch...@gmail.com]
Sent: Wednesday, April 10, 2024 10:28 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Carving a spiral

CAUTION: This email originated from outside the Walla Walla University email 
system.


Do you even need a rotory table to cut a spiral?

> On Apr 10, 2024, at 12:09 AM, gene heskett  wrote:
>
> On 4/10/24 01:57, John Dammeyer wrote:
>> A friend and I have been discussing exactly how to write the G-Code to
>> create a spiral scroll.
>> His rotary table 90:1 reduction with a 1600 micro-step motor could be set up
>> to move N steps for each step of the X axis to create the spiral.  But that
>> approach seems clumsy.
>> Say I wanted to cut a scroll with a 6mm pitch using a 3mm cutter.
>>  Without using G2 or G3 it's really just a triangle isn't it?  Move rotary
>> table distance A and move X axis distance A'.  Do it in small enough
>> increments and you get a spiral.  But I feel like I'm missing something
>> really simple.

Do you need a rotary table to cut a spiral?   It is just a series of locations 
in (x,y).  OK, if you wanted to use only (say) the X and A axis then you should 
use polar coordinates, not cartesian. The equation of a spiral on polar 
coordinates is very simple.  Then you evaluate itat many thousands of points 
and at each point write gcode to “cut to” that point.You would not need the 
rotary table.

Also why think in micro-steps and worm gear rates, you are using LCNC to do the 
kinematics, Use millimeters.

I think this problem shows that in some cases you really can not write the 
gcode by hand.  FOr continous curves in (x,y) there might be 100,000 or more 
lines of code in the file, especially if you don’t do the cut in one pass.  You 
would nee towrite software to generate the g-code.   Or use existing software, 
a lot of CAD systems will do this for you


> First, a 90/1 is quite high. I have two rotary's, both consisting of a 3NM 
> 3phase stepper/servo I made by combining the 3NM motor with a 5/1 worm. Using 
> a screw in the worms output hub as a single prox sensor index pulse 
> generator. To calibrate a complete rev, I measure the steps by starting the 
> count on the 3rd turn ans stopping the count on the 103rd turn, which gives 
> me a scale*100.  Shift the decimal point 2 places left this becomes the scale 
> for the axis in the .ini file.  All this math in linuxcnc is floating point 
> so I can ask it for 33.333 degrees and it will run to what it thinks is 
> 33.333 degrees. This stepscale:
> STEPSCALE   = 22.222 = 1 degree
> So one count is about 1/22.222 degrees, probably less than the 
> backlash in the rvs39 worm, a pretty cheap worm.
>
> Currently to make one of my maple vise screws, starting at 0 degrees its 
> around 60,000 degrees it turns for around 400 mm of screw that y travels. 
> Then I lift the tool, turn it another 180 degrees, re lower the tool and 
> bring y back to zero and b=180. Makes a perfect two start buttress thread. 
> The B is turning, in perfect sync with the Y motion, at something in the 300 
> to 400 rpm range. That 3NM motor is heating but not dangerously so.
>
> There is no reason you couldn't lay it down to make a C drive, and 
> simultaneously drive X Z & C to carve an impeller in a quite serviceable 
> scroll.
>
> The versatility of the closed loop stepper/servo, which does EXACTLY what the 
> TP tells it to do, without a PID in the path, is amazing. I have them rigged 
> to e-stop linuxcnc in about a millisecond if they make an error, like losing 
> a step. Tested till the cows come home, has yet to happen working a job. I 
> haven't hobbed any gears, but it certainly seems accurate enough to do it.
>
>> Suggestions?
>> Thanks
>> John
>>  ___
>> Emc-users mailing list
>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
>> .
>
> Cheers, Gene Heskett, CET.
> --
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author, 1940)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
>
>
>
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[Emc-users] PCIe to PCI adapter?

[Ralph Stirling]

I am upgrading an older setup with a newer small form factor
computer, and realized that the new machine has no PCI interface,
only PCIe.  I have a Mesa 5i25 from the old system that I would
like to use.  Has anybody tried using one of the $25 adapters I
see advertised to connect a 5i25 to a PCIe interface?  Something
along the lines of this is what I'm thinking of:

https://www.ebay.com/itm/185692034687

Thanks,
-- Ralph

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Re: [Emc-users] Linux Workstation.

[Ralph Stirling]

My current preference is Linux Mint (Ubuntu based distro) with the MATE 
desktop.  Second choice is Ubuntu 22 with Gnome classic desktop.

Desktop environment depends a lot on personal preference. I'm old fashioned, 
liking drop down menus.

-- Ralph

On May 9, 2023 2:15 PM, John Dammeyer  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


I have a system based on an i7-2600K CPU @ 3.4GHz with 16GB RAM and 2TB hard 
drive that used to run the 64 bit WIN-7.
For the Windows side of things I have a newer system with WIN-10 that is 
ultimately upgradable to WIN-11.  I have no desire to ever run WIN-11.  But I 
have to have Windows simply to support what my clients want.

I'm thinking it may well be time to set up a real workstation with Linux for 
email, browsing, writing, spreadsheets and CAD, etc.

The last time I looked into this there was quite a variety of user interfaces.  
From Caldera, RedHat etc…

What's currently the most supported user friendly Linux?

Thanks
John

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Re: [Emc-users] Sharpening teeny drill bits

[Ralph Stirling]

I like to buy my small drill bits and end mills from Drill Bits Unlimited.
These are resharpened bits from the pcb industry.  You can buy a box
of 50 at a time cheap.

https://drillbitsunlimited.com/default.aspx

-- Ralph

From: gene heskett [ghesk...@shentel.net]
Sent: Sunday, December 18, 2022 9:50 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Sharpening teeny drill bits

CAUTION: This email originated from outside the Walla Walla University email 
system.


Greetings all;

As many of you know a drill Dr is the bees knees, for drill bits above 6
or so mm, but a disaster for smaller bits due to the tolerances of the
stamped and plastic chuck giving you lop sided grinding. AKA BIGGER holes.

So, what jig or machine do you all use to sharpen drill bits in the
below 5mm categories? Or should I gently spiral down a 1/16" SC mill,
but that runs out of DOC long before it reaches thru a 20mm square CF
tube. I've about 35 such holes to drill in 1mm thick wall CF, 8 of which
need to go all the way thru both sides of the tube. Those will all be
thread clearance for 3mm screws, but 8 of them will need to be for a
3mmx.5 tap, in 4.1mm thick alu. CF will no doubt be hell on drill bits,
so it (or they) will need resharpened frequently I expect.

Thank you, stay warm and well everybody.

Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
  soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
  - Louis D. Brandeis
Genes Web page 



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Re: [Emc-users] Freecad path workbench + drilling small hole

[Ralph Stirling]

Use a spot drill before the small drill to get the hole on center
and true.  "Real" CAM software usually lets you select spot drilling
for each hole.  Then it generates tool path for the spot drill operation
before tool path for the regular drill.

I would love for FreeCAD to gain the features other CAD/CAM software
has.  I keep trying it out, but keep getting stuck with some key missing
piece.  I haven't made the commitment to get involved in development
though.  They came out with a new release fairly recently, so I believe
it is under active development.

-- Ralph

From: Nicklas SB Karlsson [n...@nksb.eu]
Sent: Thursday, October 20, 2022 7:23 AM
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Freecad path workbench + drilling small hole

CAUTION: This email originated from outside the Walla Walla University email 
system.


There is some things missing in the Freecad path workbench of which
some are rather simple to fix. Zig facing operation, rigid tapping, G95
feed per revolution or tooth is not possible and these are probably not
to hard to fix. While reorder and get blank from machining of previous
operation might be harder.

Have been able to figure a little bit on the data model add a zig
function but had to disable some kind of sorting function sometimes
changing direction of cut, probably to get shortest path.

Have registered to Freecad mailing lists and posted on at least one of
them but they seems dead. Anybody else activing in Freecad?


Just starting to machine my first parts milling seems to work rather
well. Drilling small holes a few millimeters I am however a little bit
uncertain it work well to start a hole with a normal length drill? Or
start point tend to slip a little bit on the surface?


Nicklas Karlsson



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Re: [Emc-users] XSY inverters (VFD)

[Ralph Stirling]

This only happens in lightly-loaded DC shunt field machines.  Here is a
pretty good explanation:

https://www.quora.com/What-is-the-run-away-condition-in-D-C-motors

My electric machines professor demonstrated this to my class 40 years
ago, He would kill the armature power before it blew up, of course.

-- Ralph

From: andy pugh [bodge...@gmail.com]
Sent: Sunday, September 25, 2022 4:36 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] XSY inverters (VFD)

CAUTION: This email originated from outside the Walla Walla University email 
system.


On Mon, 26 Sept 2022 at 00:11, gene heskett  wrote:

> If the field supply fails, the motor runs faster and faster if it can,
> until the armature parts
> exit the frame in pieces big enough to make quite effective bullets.

If the field supply fails, how is there any torque to spin the motor faster?

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] JLCpcb (was Acorn CNC)

[Ralph Stirling]

Hmm.  I either didn't look closely enough before, or JLC has lowered their 
prices and obtained some more inventory.  In any event, it looks like stm32 
chips of various flavors are still available (or now available) for board 
assembly at JLC.

-- Ralph

On Sep 13, 2022 9:59 AM, Przemek Klosowski  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Fri, Sep 9, 2022 at 3:12 AM Ralph Stirling
 wrote:
>
> My last order from JLC was six different designs, five or ten of each, one 
> fully stuffed with ten or so high grade opto's and a bunch of discretes.  
> Total cost with shipping and paypal fee was $150, arrived in one week.  A 
> single board only job would probably be $20 with shipping.  Parts for an 
> assembled board are often less than the cost of a solder stencil by itself 
> (and their stencils are pretty cheap!), unless you have some higher 
> end/scarcer parts (like stm32f103 processors now $50...).  They only assemble 
> smd parts, no through hole.

huh? 
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjlcpcb.com%2Fpartdetail%2FStmicroelectronics-STM32F103C8T6%2FC8734data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C276a785f748b455f08da95a95f7c%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637986851938013637%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=%2BTIv0Dh%2FvXhElCleh0BXaF%2Blf2Ta6iQ7NES8gfOXSeY%3Dreserved=0
seems to be around $3 and they have several thousand in stock


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Re: [Emc-users] JLCpcb (was Acorn CNC)

[Ralph Stirling]

My last order from JLC was six different designs, five or ten of each, one 
fully stuffed with ten or so high grade opto's and a bunch of discretes.  Total 
cost with shipping and paypal fee was $150, arrived in one week.  A single 
board only job would probably be $20 with shipping.  Parts for an assembled 
board are often less than the cost of a solder stencil by itself (and their 
stencils are pretty cheap!), unless you have some higher end/scarcer parts 
(like stm32f103 processors now $50...).  They only assemble smd parts, no 
through hole.

-- Ralph

-- Ralph

On Sep 8, 2022 7:00 PM, gene heskett  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On 9/8/22 18:03, Chris Albertson wrote:
> I did not know about these.  Thanks so much for posting.   So, after the
> software stops cycling the output pins, the 10 uf cap discharges through
> 750 Ohm the opto-isolator's LED and the relay opens. I will have to
> calculate the time delay, but my back of the envelope says about 0.02
> seconds.  Is that close to what you observe?  Or did I miss a decimal place?
>
> It looks like you have a good design and if you can sell these at a
> reasonable price they should be standard equipment.
>
> But I was thinking,  Now that we have companies like JLCPCB who can make
> printed circuit boards and solder components for well under $1 per PCB, I
> would not want to be in the business of making and selling small electronic
> devices.   I would design this thing so that it used only parts from
> JLCPCB's "short list" to keep the cost under $1. Post the design files and
> let people order their own directly from the manufacturer.
An interesting idea. Any idea of the delay to expect after they receive
the order and the
payment?

How about what most folks call NRE?
> My concern with this is that it does not catch a failure where only the
> user space program crashes and the kernel-space task continues to run.
> Perhaps something else can watch for this?
I have not ever observed that.  Not saying it cannot happen, but based
on my experience,
someplace between pretty slim and point triple ought zip.

>
> On Thu, Sep 8, 2022 at 2:15 PM  wrote:
>
>> On 2022-09-08 15:55, andy pugh wrote:
>>> I rely on the Mesa watchdog. If I was running a system that couldn't
>>> do that then I would start looking t watchdog circuits, though last
>>> time I looked I didn't see anything that simply opened a relay if the
>>> charge pump stopped.
>> I actually make this:
>>
>> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.mattshaver.com%2Fsite.php%3Flink%3Dpcbs%2Fcp2estop%2Findex.htmdata=05%7C01%7Cralph.stirling%40wallawalla.edu%7Caf303bf0f61a4b48a8ac08da92070fd5%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637982856289742948%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=QYI598yxb%2BiakEQjjsdEPwZLFYxvJEAixgwFPQMZugA%3Dreserved=0
>>
>> It was used in Smithy machines and I have a bunch of them left. Haven't
>> sold one in years and don't know what they should cost anymore, but if
>> someone needs one I could look into it! :)
>>
>> Thanks,
>> Matt
>>
>>
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>>
>


Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
  soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
  - Louis D. Brandeis
Genes Web page 




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Re: [Emc-users] Acorn CNC

[Ralph Stirling]

What kind of machine does the potential Acorn buyer plan to control?
Most of these newer controls are aimed at vanilla 3-axis cartesian
machines.  They generate step/dir pulses, and have three home inputs,
and not a lot else.  LinuxCNC really shines when you have more complex
I/O needs, unusual kinematics, tool changers, integration with external
elements (bar feeders, robots, etc) and the like.  I haven't seen any of
the newer open source or low cost controllers address these more sophisticated
applications.

-- Ralph

From: John Dammeyer [jo...@autoartisans.com]
Sent: Tuesday, September 6, 2022 5:06 PM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Acorn CNC

CAUTION: This email originated from outside the Walla Walla University email 
system.


If I was to offer an reason to go LinuxCNC to someone who is attracted to an 
Acorn system what would I say.  Other than the Acorn is really just a cape for 
a BeagleBone Black.  But the user interface is all via Ethernet so a PC of some 
sort is still required.

There appear to be so many CNC systems out there now.  Even LinuxCNC now 
suffers from too many user interfaces to the point where is the Tormach really 
still LinuxCNC or is it something different too?

Comments?
John



"ELS! Nothing else works as well for your Lathe"
Automation Artisans Inc.
www dot autoartisans dot com


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Re: [Emc-users] labeling wires and cables

[Ralph Stirling]

The tubing is flat of course, and comes in 1/8", 1/4", 3/8", 1/2", 3/4" and 1" 
widths.  I haven't tried larger than 1/2" yet.  So a 1/2" piece will slip over 
a cable about 3/4" in diameter.  Shrink ratio is 3:1, so the 1/2" tubing should 
shrink down to about 1/4" diam.

-- Ralph

On Aug 4, 2022 9:57 PM, Greg Bernard  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


What size wire do each each of the heat shrinks do?


On Thu, Aug 4, 2022, 10:28 PM Ralph Stirling 
wrote:

> If you have ever wished for a nice way to label
> wiring in a cnc machine project, you should
> consider printing on heat shrink tubing.  I just
> bought a used Dymo LabelManager 160 for
> $21 on ebay, and several heat shrink label
> cartridges for about $5 each (for a 5ft roll),
> and it makes beautiful wire tags!  I had always
> thought it took an expensive industrial label
> printer to print on heat shrink, but the
> cartridges are compatible with the consumer
> label maker, and work fine in it.  The cartridges
> I got were 18051, 18053, and 18055 types
> (1/4", 3/8", and 1/2" wide tubing).  I'm going
> to order the 18057 and 1805443 (3/4" and
> 1") for larger cables.
>
> The tapes are from:
>
>
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.amazon.com%2Fstores%2Fpage%2F3E2EF336-B1AD-49DD-A724-A476FC0C2A4C%2Fsearch%3Fref_%3Dast_bln%26terms%3Ddymo%2520heat%2520shrinkdata=05%7C01%7Cralph.stirling%40wallawalla.edu%7C35a4a3bcf830441d516208da769eed15%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637952722213865152%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=OzKeD0T4RzzdvKS4hENkrYGaGycnlh6F2rzLWX3qUhc%3Dreserved=0
>
> -- Ralph
>
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[Emc-users] labeling wires and cables

[Ralph Stirling]

If you have ever wished for a nice way to label
wiring in a cnc machine project, you should
consider printing on heat shrink tubing.  I just
bought a used Dymo LabelManager 160 for
$21 on ebay, and several heat shrink label
cartridges for about $5 each (for a 5ft roll),
and it makes beautiful wire tags!  I had always
thought it took an expensive industrial label
printer to print on heat shrink, but the
cartridges are compatible with the consumer
label maker, and work fine in it.  The cartridges
I got were 18051, 18053, and 18055 types
(1/4", 3/8", and 1/2" wide tubing).  I'm going
to order the 18057 and 1805443 (3/4" and
1") for larger cables.

The tapes are from:

https://www.amazon.com/stores/page/3E2EF336-B1AD-49DD-A724-A476FC0C2A4C/search?ref_=ast_bln=dymo%20heat%20shrink

-- Ralph

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Re: [Emc-users] Linuxcnc OEM?

[Ralph Stirling]

So is "Next Generation Control" where the .ngc file extension
for LinuxCNC g-code files comes from?

-- Ralph

From: Todd Zuercher [to...@pgrahamdunn.com]
Sent: Friday, July 22, 2022 11:55 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Linuxcnc OEM?

CAUTION: This email originated from outside the Walla Walla University email 
system.


The earliest published papers I can find on EMC at the NIST website are dated 
1993+.  Here is a link to the 1993 paper.
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftsapps.nist.gov%2Fpublication%2Fget_pdf.cfm%3Fpub_id%3D820482data=05%7C01%7Cralph.stirling%40wallawalla.edu%7C97e0ca31bf884cccd02108da6c13d1fe%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637941129637384642%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=JwgpKqLmsNb4rcDVK5wlfUnjKI0gO5lK4%2FyLKxawCBg%3Dreserved=0.

The page Brian linked to (from old Linuxcnc Docs) has a link to an NIST paper 
(dated 2000) that mentions that the EMC project officially began in 1992.  And 
was inspired by, grew out of, or was at least influenced by a "Next Generation 
Control" program funded by the USAF and started around 1987.

These and a number of other historic papers on the subject can be easily found 
on the NIST website.  Just got the NIST's home pate click publications and 
search for "Enhanced Machine Controller".

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: BRIAN GLACKIN 
Sent: Friday, July 22, 2022 11:59 AM
To: Enhanced Machine Controller (EMC) 
Subject: Re: [Emc-users] Linuxcnc OEM?

[EXTERNAL EMAIL] Be sure links are safe.

Buried in the various lists are history snips of the development of what we 
know know as LCNC. Earliest dates I have seen for work on this was mid 1980s.

Heres one such snip

https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flinuxcnc.org%2Fdocs%2Fhtml%2Fcommon%2Femc-history.htmldata=05%7C01%7Cralph.stirling%40wallawalla.edu%7C97e0ca31bf884cccd02108da6c13d1fe%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637941129637384642%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=3DfCrIRbMXxmY2QfCB3nASbgPWg6qnT9jtCqElf3ydk%3Dreserved=0


On Fri, Jul 22, 2022 at 8:53 AM Todd Zuercher  wrote:

> I think the page that linked to it said that it was published in 1994.
> But I agree it is odd that the date isn't in the paper itself.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: John Dammeyer 
> Sent: Thursday, July 21, 2022 3:43 PM
> To: 'Enhanced Machine Controller (EMC)'
> 
> Subject: Re: [Emc-users] Linuxcnc OEM?
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> Interesting that a document like that doesn't have a date.
>
> > -Original Message-
> > From: Todd Zuercher [mailto:to...@pgrahamdunn.com]
> > Sent: July-21-22 6:57 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Linuxcnc OEM?
> >
> > That isn't quite how I read this.
> > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fnam04.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Ftsdata=05%7C01%7Cralph.stirling%40wallawalla.edu%7C97e0ca31bf884cccd02108da6c13d1fe%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637941129637384642%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=lu8vi3h7CABwGFZAVzfiIh4Z77%2FDH9IakT5RLeLHiw4%3Dreserved=0
> > ap
> > ps.nist.gov%2Fpublication%2Fget_pdf.cfm%3Fpub_id%3D820252data=0
> > 5%
> > 7C01%7Ctoddz%40pgrahamdunn.com%7C88e644dce51b4c4f1d9908da6b515c04%7C
> > 57
> > 58544c573f47cebee96c3e0806fb43%7C0%7C0%7C637940294428622958%7CUnknow
> > n%
> > 7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLC
> > JX
> > VCI6Mn0%3D%7C3000%7C%7C%7Csdata=kULzq7GHrdEhnT5bwkGS4m%2FJ4W7Ca
> > wt
> > b1KwFiHDYaLs%3Dreserved=0
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.
> > 630 Henry Street
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
> >
> > -Original Message-
> > From: dave engvall 
> > Sent: Thursday, July 21, 2022 9:37 AM
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] Linuxcnc OEM?
> >
> > [EXTERNAL EMAIL] Be sure links are safe.
> >
> > One has to remember that emc was written not as a machine controller
> > but to demonstrate the concept of communication between machines. In
> like manner steppers were an add-on.
> > Linuxcnc is only alive today because of a critical mass of dedicated
> volunteer programmers.
> >
> > Dave
> > On 7/21/22 2:32 AM, andy pugh wrote:
> > > On Thu, 21 Jul 2022 at 03:22, Charles Steinkuehler
> > >  wrote:
> > >> I'm not sure of their international shipping details, but
> > >> Probotix sells LCNC based routers:
> > >>
> > 

Re: [Emc-users] Handy looking optocoupler

[Ralph Stirling]

Even more amazing, it is made by multiple manufacturers and is actually in 
stock at distributors!

Thanks for the tip, Andy.

-- Ralph

On Jul 20, 2022 3:59 AM, andy pugh  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.onsemi.com%2Fproducts%2Finterfaces%2Fhigh-performance-optocouplers%2Fspecific-function-optocouplers%2Fhcpl3700data=05%7C01%7Cralph.stirling%40wallawalla.edu%7Ca548adc86b5c46d8127e08da6a3eec10%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637939115752586966%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=4CV1Isk86N6gS7UyVMYIHOPPV9Z2IyvkRRBlyfEwZ74%3Dreserved=0

It has a built-in bridge rectifier so can detect AC and DC up to 240V.

I found it while looking for things for a home automation project.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] spindle problem

[Ralph Stirling]

What kind of ceiling clearance and structure do you have over the Mazak?  Would 
it be possible to rig up a hoist in place to lift the spindle?

-- Ralph

On Jun 27, 2022 9:00 AM, dave engvall  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Hi Todd and others;
Indeed it is a horrible idea but I feel backed to the wall.

I have T lugs but they are secured by M6 shcs which is no where close to
as strong as the normal retention stud. However, I plan to use the
machine at full rpm with AlCrN coated end mill,
coolant and keep the loading low.
I don't have much to lose. My chances of living more than 10 years more
are not good and that assume health good enough to work in the shop.

Dave


On 6/27/22 7:25 AM, Todd Zuercher wrote:
> Gluing a spindle taper into a spindle sounds like a truly horribly idea.  
> (I'd be more worried about it letting go when you didn't want it to, than 
> trying to get it out later if you did want to remove it, although that also 
> may prove problematic.)
>
> The drive lugs are usually removable/replaceable.  Maybe you could make new 
> drive lugs that also positively engage the tool holder to retain it.  
> Something like a longer T shape that would capture the tool holder flange.  
> (Personally I'd do every thing I could to fix the spindle properly though.)
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: dave engvall 
> Sent: Monday, June 27, 2022 9:57 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] spindle problem
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> Update: The drive lugs get in the way of a safety disk or ring or anything 
> else. Epoxy looks more promising; just a semi-permanent solution.
> Note: Epoxy can always be removed with heat or chlorinated solvents but...
> Dave
>
> On 6/27/22 6:27 AM, dave engvall wrote:
>> Back again;
>> Since crawling in under the spindle is difficult for an old stiff guy
>> I laid the iphone on the table and took a pic, rotated the spindle 45
>> degrees and took another; nothing useful moved. However, there are
>> large socket head cap screws around the perimeter of the spindle. It
>> should be possible to make a safety cap that has a few thou clearance
>> to limit axial movement. 'Maybe' I can jury rig something. Basically I
>> have to see what kind of clearances I have. An actual thrust bearing
>> seems like asking for trouble.
>> Psychologically it would almost be easier to pick up the radiator cap
>> and run a new(er) one in. Still that brings all sorts of problems of
>> its own. Hard to win.
>> Back to the drawing table. ;-)
>> Dave
>>
>> On 6/26/22 9:10 AM, andy pugh wrote:
>>> On Sun, 26 Jun 2022 at 15:45, dave engvall  wrote:
>>>
 A couple of solutions present themselves but neither are ideal.
 Simply use the M6 shcs that hold the dogs in place to secure the CAT40.
 Balance and adequate strength/safety would seem to present problems.
>>> Does the nose have any extra holes? There are 4 threaded holes with
>>> no obvious function on my 30INT spindle and looking around the
>>> internet I see threaded holes in some of the CAT40 spindles.
>>> It seems that you could use those to hold in a custom ER40 (or
>>> similar) adaptor.
>>>
>>> 4000 rpm probably isn't fast enough to need to worry too much about
>>> balance.
>>>
>>>
>>
>>
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>> f47cebee96c3e0806fb43%7C0%7C0%7C637919350789204421%7CUnknown%7CTWFpbGZ
>> sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3
>> D%7C3000%7C%7C%7Csdata=3sMlH8RJi3F6SLfmQUSLComdi4ljNjUd3xja1Zz%2F
>> X6I%3Dreserved=0
>
>
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>
>
> 

Re: [Emc-users] Spare 6i25?

[Ralph Stirling]

Thanks for putting it back in stock on the store site!
I've ordered one.

We originally had the 5i25 in a very, very old Dell
full size tower, and that computer was undesirable
for multiple reasons.  I had a Dell 790 that was working
well with the 5i25, and ordered what I thought was
the same model - turned out what I got was very small
form factor, with no PCI slots, only PCIe.  My friend
loves the size of the SFF unit, so decided he would
rather upgrade to the 6i25 and keep the SFF computer.
I can always use another 5i25 in my lab, as I have plenty
of older computers with PCI slots, so I'll swap him for a
small charge.

Thanks again.
-- Ralph

From: Peter C. Wallace [p...@mesanet.com]
Sent: Friday, June 24, 2022 11:49 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Spare 6i25?

CAUTION: This email originated from outside the Walla Walla University email 
system.


On Fri, 24 Jun 2022, Ralph Stirling wrote:

> Date: Fri, 24 Jun 2022 15:28:17 +
> From: Ralph Stirling 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "emc-users@lists.sourceforge.net" 
> Subject: [Emc-users] Spare 6i25?
>
> Anybody have a spare 6i25 they would be willing to sell?  Helping a friend 
> set up his Prolight 1000 mill, and discovered his SFF Dell computer doesn't 
> have pci slots, so the 5i25 we got won't work.  Mesaus and Mesanet are out of 
> stock.
>
> Thanks,
> -- Ralph
>
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>


There are a few left at Mesa

Peter Wallace
Mesa Electronics


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[Emc-users] Spare 6i25?

[Ralph Stirling]

Anybody have a spare 6i25 they would be willing to sell?  Helping a friend set 
up his Prolight 1000 mill, and discovered his SFF Dell computer doesn't have 
pci slots, so the 5i25 we got won't work.  Mesaus and Mesanet are out of stock.

Thanks,
-- Ralph

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Re: [Emc-users] OT but built on linuxcnc machines:) affordable color sensor for project (24v model)

[Ralph Stirling]

You could try a simple photo prox sensor with gain/threshold setting.
The AutomationDIrect sensors we use let you "teach" the background
and foreground light levels.  If you are lucky, your black and green may
be different enough in reflectance to give you your trigger.  May not
work, though, as the green and red may be too similar.  I wonder if a
simple colored lens in front of the sensor head would let you distinguish.
Maybe two prox, one with a red lens and one without.  So you can detect
if you have an object, and if it isn't red.

Or check out this A-D color sensor:
https://www.automationdirect.com/adc/shopping/catalog/sensors_-z-_encoders/photoelectric_sensors/color_sensors/opt2023
Might be as expensive as what you are looking at.

-- Ralph

From: andrew beck [andrewbeck0...@gmail.com]
Sent: Wednesday, May 11, 2022 4:29 PM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] OT but built on linuxcnc machines:) affordable color 
sensor for project (24v model)

CAUTION: This email originated from outside the Walla Walla University email 
system.


hey guys

i am sure there is lots of experience here

i am looking for a color sensor to sense when a red color chip goes past on
a conveyor

normally the chips are just green and black.  they can be colored in with a
red marker if they are faulty and then we want this sensor to detect them.

currently i am getting prices back at 500 bucks nzd each and i need 4 of
them which seems a bit pricey lol

considering at the other end of the price point i can get a arduino option
for 8 dollars but it is not so plug and play. and is only 5v and needs a
chip too i think.

i want something that can be connected with a PLC to have a simple trigger
on or off .

you guys got any ideas?

regards

Andrew

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Re: [Emc-users] Do pnp prox switches need a pulldown load R?

[Ralph Stirling]

Yes, european color code is brown=V+, blue=gnd, black=output.
With NPN, load is referenced to V+, with PNP, load is referenced to gnd.

-- Ralph

From: Peter C. Wallace [p...@mesanet.com]
Sent: Wednesday, May 11, 2022 2:00 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Do pnp prox switches need a pulldown load R?

CAUTION: This email originated from outside the Walla Walla University email 
system.


On Wed, 11 May 2022, gene heskett wrote:

> Date: Wed, 11 May 2022 16:43:59 -0400
> From: gene heskett 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Do pnp prox switches need a pulldown load R?
>
> On Wednesday, 11 May 2022 16:19:58 EDT Peter C. Wallace wrote:
>> On Wed, 11 May 2022, gene heskett wrote:
>>> Date: Wed, 11 May 2022 16:13:58 -0400
>>> From: gene heskett 
>>> Reply-To: "Enhanced Machine Controller (EMC)"
>>>
>>> 
>>>
>>> To: emc-users@lists.sourceforge.net
>>> Subject: [Emc-users] Do pnp prox switches need a pulldown load R?
>>>
>>> Greetings all;
>>>
>>> Peter in particular,
>>>
>>> This is my first try at utilizing a prox switch, and while the led on
>>> it responds just fine on 12 volts, I measure around 6 volts on the
>>> blue wire when its off, and only 7.1 volts when its fired. With
>>> +12.0 volts on the red wire.  These are "PNP" switches.
>>>
>>> So I'm assuming my 10 meg meter is not enough load to pull it down
>>> when its off. So what value of loading R to common is needed to make
>>> it properly register to a field input of a 7i76 useing a 12 volt
>>> field power src?
>>>
>>> Is that 7 volts enough to make a field input reliably see a logic
>>> one?
>>>
>>> Thanks all.
>>>
>>> Cheers, Gene Heskett.
>>> --
>>> "There are four boxes to be used in defense of liberty:
>>> soap, ballot, jury, and ammo. Please use in that order."
>>> -Ed Howdershelt (Author, 1940)
>>> If we desire respect for the law, we must first make the law
>>> respectable. - Louis D. Brandeis
>>>
>>>
>>>
>>>
>>>
>>> ___
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>>
>> Sounds faulty or mis-wired
> No docs, fleabay purchase. I'm assumeing the black wire is common, the
> red wire is the 9 to 30 volt supply, and the blue wire is the output.
>
> Right?
>
> And its drawing over 120ma when fired, and if I leave it fired for 10
> minutes it will burn my hand to touch it! This is true even if the blue
> wire is floating.



If it draws excess current when on, it may be that blue is GND and black
is the output...


Peter Wallace
Mesa Electronics



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Re: [Emc-users] Hight Frequency VFD

[Ralph Stirling]

I bought an Invertek VFD, made in England, from VFDexchange on ebay last year.  
I haven't fired it up yet, unfortunately, but the specs and price appealed to 
me (5hp single phase input, $500usd new).  Excellent manual.

-- Ralph

On Apr 26, 2022 10:48 AM, Todd Zuercher  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Granted that is only a 12kw drive not a 15kw, but that is less than a twelfth 
the cost of what our machine manufacturer is quoting us.

I've never bought through Alibaba.  Anyone here from the USA with much 
experience buying through them?

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Leonardo Marsaglia 
Sent: Tuesday, April 26, 2022 12:17 PM
To: Enhanced Machine Controller (EMC) 
Subject: Re: [Emc-users] Hight Frequency VFD

[EXTERNAL EMAIL] Be sure links are safe.

I rectify myself, the factory price for that model was almost 350 USD.

Dear Leonardo
> Hi，Have a nice day! Here is the quotation E280-4T0110G/4T0150P EXW
> Unit price：348 USD
>

The only downside is that they only accept T/T but if you have no problem
with that it's a pretty good deal.

El mar, 26 abr 2022 a las 12:52, Leonardo Marsaglia ()
escribió:

> By the way, here is the manual:
>
>
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1Qs7lFq6KdPeuSAL7QQmR4g3Vfv53rjW-%2Fview%3Fusp%3Dsharingdata=05%7C01%7Cralph.stirling%40wallawalla.edu%7Ccc5bdf28376e44cafa3908da27ad0424%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637865921311954911%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=fph3frPPgYWf4J7ODRx9bujpX8HfoD4kq%2FQfZZFiY0c%3Dreserved=0
>
> El mar, 26 abr 2022 a las 12:50, Leonardo Marsaglia (<
> ldmarsag...@gmail.com>) escribió:
>
>> Hi Todd,
>>
>> A few months ago I purchased a Simphoenix 12 KW E280 VFD (E580 sometimes
>> depending the country they export to) and it can reach 1000 hz (you will
>> have to edit some parameters because it's blocked from factory, but I
>> could do it and it works). I think it costs around 500 USD plus shipping.
>>
>> I purchased from an Alibaba supplier because that way I could use credit
>> card but you can contact them here sale...@sunfardrive.com.
>>
>> I only tested the VFD cutting air but it worked flawlessly so far.
>>
>> Hope that helps!
>>
>>
>>
>>
>> El mar, 26 abr 2022 a las 12:43, Todd Zuercher ()
>> escribió:
>>
>>> Anyone know a good place to purchase a high frequency VFD?  We had the
>>> drive in one of our CNCs die.  The old drive was a HSD DS15000.  The
>>> spindle is an 18kw 24000rpm 4pole HSD router motor.  The old drive is rated
>>> for 1-1000hz and that seems to be the problem, all of the off the shelf
>>> drives I can find are limited to output frequencies less than 500hz which
>>> would limit our spindles top speed to only 15000rmp.  Our machine builder
>>> quoted us for a Yaskawa V1000 drive with 1000hz firmware (model#
>>> VU4A0038FAA-134) that they do have in stock but they are marking up their
>>> price to more than double the normal list price for that drive.  Every
>>> other place I've checked with so far are quoting us months long lead times
>>> for that drive.
>>>
>>> I don't have to have a Yaskawa drive, I think I'd be ok with any drive
>>> capable of 15kw and at least 800hz output.  (Oh, it would be nice if it
>>> would fit in the cabinet where the old one did, have about 9inches x
>>> 15inches  of space there.)
>>>
>>> Anyone have any suggestions for a good source for "obtainable" drive
>>> that would fit the bill?  For example we have a machine with a Fuji Frenic
>>> drive with 0-1000hz, but I can't find any info on buying a new equivalent,
>>> all the new Frenic drives I can find have max frequencies under 500hz.  I'm
>>> guessing it is similar to Yaskawa  for most other manufacturers where you
>>> have to live in the right part of the world, ask nicely and then maybe they
>>> might sell you a drive with the "special" HF firmware.
>>>
>>> Todd Zuercher
>>> P. Graham Dunn 
>>> Inc.
>>> 630 Henry Street
>>> Dalton, Ohio 44618
>>> Phone:  (330)828-2105ext. 2031
>>>
>>>
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>>> Emc-users@lists.sourceforge.net
>>> 

Re: [Emc-users] Coordinate systems for horizontal spindles

[Ralph Stirling]

There is probably a post processor setting for X axis direction to
accommodate the variation out there.

-- Ralph

From: andy pugh [bodge...@gmail.com]
Sent: Monday, April 11, 2022 10:10 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Coordinate systems for horizontal spindles

On Mon, 11 Apr 2022 at 18:07, Todd Zuercher  wrote:
>
> I bet that there are a lot of horizontals out there configured backwards. 
> (Had never really thought about it myself, never worked with one.)

I only noticed when I tried using CAM-generated code on a
non-symmetrical part with the origin not in the centre.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] Can't compile MODBUS VFD in 2.8.2

[Ralph Stirling]

Plug in a loop back plug (pins 2 and 3 connected) and run any
terminal emulator ("screen", and Arduino IDE serial monitor are
two convenient ones available on Linux) to see if you get back
what you type.  That will verify the port works and that you are
addressing the correct one.  Then check if you have the right
baud, number of bits, and parity settings for your VFD.  Is the
VFD RS232 or RS485 serial?  A lot of them are RS485 multidrop,
which requires an adapter from the RS232 serial out of you pc.

-- Ralph

From: Danny Miller [dan...@austin.rr.com]
Sent: Sunday, April 10, 2022 10:27 AM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Can't compile MODBUS VFD in 2.8.2

CAUTION: This email originated from outside the Walla Walla University email 
system.


Nothing to unplug- it's a built-in RS232 DB9.  Nothing enumerates across it.

I'm baffled where to go.  I see there's a port /ttyS0 from the command line.

Launching LinuxCNC from the command line shows text warnings about
Modbus timing out.  It's just not communicating.  I played with the
loadusr command and recompiled the code with /ttyS0 as the new default
if the command line option didn't take somehow.

I'm pretty sure the x200 code and libmodbus are not the prob- something
about config?  I don't know where to look.  I suppose the RS232 port
itself could physically be busted, I could look at it with a logic
anaylzer.  Be nice to see if anything was trying to come out.  I don't
think it could be putting out valid traffic, if it did it I think the
VFD would turn on.

Hmm, it is going through an isolated RS232-MODBUS bridge.  But that and
the cable and VFD are known working.  I put the cable back on the other
machine and it works.

I guess I could install a putty terminal and see if I can send UART
traffic in and out to verify the port is working.

Maybe I could give up on the built-in RS232 and try a USB FTDI to RS232?

Danny

On 4/9/2022 3:16 PM, andy pugh wrote:
> On Sat, 9 Apr 2022 at 16:44, Danny Miller  wrote:
>
>> I tried specifying the port loadusr x200 device="/dev/ttyS0". I'm not
>> sure how my serial ports are named.  Would "/dev/ttyUSB0" be if that was
>> an FTDI USB to serial device?
> Plug and unplug it, see what appears and disappears in /dev/
>


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Re: [Emc-users] custom | stock bearing nut

[Ralph Stirling]

McMaster and Misumi have M15x1 bearing retaining nuts, but nothing
finer pitch.  Hard to say if your ball screw was supplied with
the thread from THK or if it was supplied unfinished and
machined later.  I don't even see M15x0.8 in Machinery's Handbook.

-- Ralph

From: dave engvall [dengv...@charter.net]
Sent: Tuesday, April 5, 2022 9:43 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] custom | stock bearing nut

CAUTION: This email originated from outside the Walla Walla University email 
system.


Hi all,
I have a pair of ball screws: THK KX 71227 A
These are new but older and as far as I can tell not on the THK site.
They are threaded on one end to retain a bearing.
M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or
am I stuck with
having a pair custom made?
I've spent a fair amount of time searching the web but maybe (probably)
someone else's  google foo is better than mine.
As always TIA

Dave


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Re: [Emc-users] Best way to get analog voltage from 7i95

[Ralph Stirling]

Hi Leonardo,

I've attached a simple schematic I came up with recently for exactly the
same purpose (0-10v analog out from 0-3.3v pwm).  I have not had the
chance to breadboard it yet, but believe it should work.  You can adjust
the R-C filter values as needed.  The choice of opamp is fairly arbitrary
as well, although a "rail to rail" part that gets close to 0v would be helpful.

You may not want to be making your own circuit, but it sounded like you
are getting pretty desperate.  If you would like this circuit tested before
you spend time on it, I might have time later today to try it out.

-- Ralph

From: Leonardo Marsaglia [ldmarsag...@gmail.com]
Sent: Sunday, April 3, 2022 4:50 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Best way to get analog voltage from 7i95

CAUTION: This email originated from outside the Walla Walla University email 
system.


>
> What are you searching for?   You don't really need the optical isolator if
> the VFD and computer grounds are tied together.   If you do want isolation
> then almost any optical isolator will work  Even those "C" shape sensors
> will do the job,  The resistor and the capacitor are essential but their
> values are not critical as long as the product of the R and C adds up to
> about the same.
>

I just caught what you were asking lol, I'm a little burned out these days.
I was searching for Andy's suggestion to see if there was  something here
but it's complicated. Electronic component distributors here are not that
big like the ones in the US . So they don't have the variety you have
there. Also they are not that well optimized for online selling like for
example Digikey, so searching for a component is really a pain in the ass
sometimes. In fact, many times in the past when my brother and I were
experimenting with induction heaters, it was a lot easier and practical to
purchase everything from Digikey and ship it here, the shipping usually
took 3 or 4 days. The obvious problem is when you have to purchase 5 USD on
an item and the shipping costs like 80 USD.

El dom, 3 abr 2022 a las 6:10, gene heskett ()
escribió:

> On Saturday, 2 April 2022 23:51:58 EDT Chris Albertson wrote:
> > What are you searching for?   You don't really need the optical
> > isolator if the VFD and computer grounds are tied together.   If you
> > do want isolation then almost any optical isolator will work  Even
> > those "C" shape sensors will do the job,
>
> And quite likely they can also do the voltage boost to a 10 volt swing
> needed at the output, and 20x faster than the typical 4 pin opto. I'd put
> them in the dark with a heat shrink sleeve though.
>
> > The resistor and the
> > capacitor are essential but their values are not critical as long as
> > the product of the R and C adds up to about the same.
>
> I'm not convinced the filter would be needed, the vfd will generally have
> its own filter.
>
> > On Sat, Apr 2, 2022 at 8:32 PM Leonardo Marsaglia
> > 
> > wrote:
> > > Well, a quick search gave me ZERO results here. The only results were
> > > at ar.mouser.com but mouser is not established here AFAIK, it looks
> > > like their
> > > spanish site is from Mexico.
> > >
> > > El sáb, 2 abr 2022 a las 19:15, gene heskett ()
> > >
> > > escribió:
> > > > On Saturday, 2 April 2022 17:14:41 EDT Andy Pugh wrote:
> > > > > > On 2 Apr 2022, at 04:33, Leonardo Marsaglia
> > > > > > 
> > > > > > wrote:
> > > > > >
> > > > > > Well, I can try that but I recall we did a simple low pass
> > > > > > filter
> > > > > > years ago
> > > > >
> > > > > This works, and is isolated.
> > >
> > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fphotos.google.com%2Fshare%2FAF1QipPXuj4R1h7P3oLpKCcGnfS-mFd-qO5nFdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C58b86ce96b304d7089f208da1568345d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637845834553819364%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=pwqrZOzr6kzBZN6OjdOHpNMFVm72HrCcpzEJJbunGqI%3Dreserved=0
> > > Pe>
> > > > > WEY-40VKkLIfDkAhSi7m4YDPVm0JCGQ/photo/AF1QipPEONYllA-BBGWD6cOLXsS
> > > > > WFnCU3 X27btSueFJs?key=dDNfajB5TTZDalphY2dKamtVeDdrcTRJaGZqdmZR
> > > >
> > > > And that is exactly what the doctor ordered. Thanks Andy.
> > > >
> > > > But can Leonardo src it in his reach?
> > > >
> > > > Cheers, Gene Heskett.
> > > > --
> > > >
> > > > "There are four boxes to be used in defense of liberty:
> > > >  soap, ballot, jury, and ammo. Please use in that order."
> > > >
> > > > -Ed Howdershelt (Author, 1940)
> > > > If we desire respect for the law, we must first make the law
> > > > respectable.> >
> > > >  - Louis D. Brandeis
> > > >
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> > > > Emc-users@lists.sourceforge.net
> > > > 

Re: [Emc-users] mfg of Servo To Go motion board

[Ralph Stirling]

Hi Dominic,

It would seem to me that if your goal is to teach vets how to retrofit
or build cnc machine tools, you would do well to use current technology
that they could obtain to perform jobs after they are done with your
program.

Currently available hardware for LinuxCNC use is primarily
Mesa Electronics, Pico Electronics, or Ethercat based industrial
drives.  Computers used can be modern x86 64 bit machines with
ethernet, pci-e, or pci interface, or Raspberry Pi 4B single board
computers.

Reverse engineering a 20 year old ISA bus card would not seem to
be the best use of time in my opinion.  I don't think designing your
own thyristor-based motor drives makes much sense either, since
good MOSFET-based commercial drives are readily available at
modest prices.

-- Ralph

From: Dominic Francisco [df.milv...@gmail.com]
Sent: Friday, April 1, 2022 11:57 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] mfg of Servo To Go motion board

CAUTION: This email originated from outside the Walla Walla University email 
system.


Big Howdy to the Group:
Our 501, C-19 non-profit, veteransinitiatives.org, is a small school,
composed of MilVets who have defended this priceless Nation.
Our backrouinds include : Machining, Founding, Patternmaking,
Metallurgy, Physical Chemistry, Heat Treat, Ceramics: a bunch of reprobate
motor-heads, hot-rodders & gear-heads, who remain convinced, even in our
advanced state of degradation, that we shall continue our mfg school to
place our warriors in our Nation's mfg sector.
We purchased one of these splendid, STG motion boards some years ago to
update the control of a 12klb, 1978, 4-axis Monarch VMC; worked like a
champ!
This STG board was capable of 8-Axis with a servo update time of 1 ms.
we retained the original thyristor amplifier which could output ~400 A &
300 V on start-up. the worktable capacity was ~1600lbs!  our for-profit
side regularly whittled out SAE- 4000 series steels for industry.
We sold that VMC to some DisAbled American Veterans (DAV's) we had
trained in our NP & started farming-out work to them, mostly DoD forgings &
castings.
We are now primarily a non-profit helping our warriors find meaningful
employment in our Nation to bring mfg back to the USofA.
Now we find that the STG firm went out of biz, with the un-fortunate
death of its inventor & mfg. now whattarwegonnado?

We got us 2 plans: purchase several used  STG boards to continue
teaching digital control & machine tool rebuilding to our most deserving
citizen, our DAV's. we have also interviewed some ambulatory paralyzed
veterans (PVA's) to join in.
The other crazed choice, is to start mfg the STG board from scratch.
some of our volunteers have experience in industry mfg circuit boards. we
could whittle-out frames to silk screen the traces & set up one of our
small mills to NC the holes.
We have mfg about 50 small circuit cards for the thyristor amps. these
control the beefy thyristors: zero-crossing detector, gate control,
switching, BEMF damping & small-signal routing when reversing the axis
(S-curves on start-up & when approaching the end of axis & corners).
Some of the EMC crew out there may have some suggestions on another
control board (or combination of control cards) we could mfg.

We are committed to mfg a motion control system. just think of what our
warriors could learn in this esoteric atmosphere; consider their employment
choices!

We hope to hear from you EMC, LINUX.org & CNC.org participants in this
technical worthy endeavor.


 May God protect our valiant
warriors,

don anders
patrick callahan
giovanni bertoni
  nora o'neille
sean finnegan

df.milv...@gmail.com
veteransinitiatives.org








































































































































+

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Re: [Emc-users] Because I can't seem to finish anything... Nebel lathe conversion.

[Ralph Stirling]

Sam, when you finish the lathe project we'll give you the Nebel prize.

-- Ralph

On Mar 18, 2022 7:33 AM, Sam Sokolik  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Thought about it...  :)

On Fri, Mar 18, 2022 at 4:50 AM andy pugh  wrote:

> On Fri, 18 Mar 2022 at 03:11, Sam Sokolik  wrote:
> >
> > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dmes7pFZ90Fgdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C8d6e90e3bcac4a82508b08da08ec387c%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637832107926025651%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=oPrGMdVC%2BNxOQEWA3q8SROJWCwju8%2BTSFUUK3JVYtFY%3Dreserved=0
>
> If you fitted linear scales you could potentially have manual rapids
> by disengaging the half-nuts.
>
>
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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Re: [Emc-users] step/dir driven spindle and rigid tapping

[Ralph Stirling]

Well, after fooling with it for a couple of hours, we decided
a 5i25 would be a good investment that will eliminate a
number of issues including this one.  Thanks for the insight
though.

-- Ralph

From: andy pugh [bodge...@gmail.com]
Sent: Sunday, March 6, 2022 4:57 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] step/dir driven spindle and rigid tapping

CAUTION: This email originated from outside the Walla Walla University email 
system.


On Sun, 6 Mar 2022 at 22:31, Ralph Stirling
 wrote:

> plain parallel port stepper control.  I'm setting up the
> spindle as step/dir, since he doesn't have analog output.
> He especially wants to be able to do rigid tapping.
>
> I believe I can use the stepgen counts or position-fb
> in place of a spindle encoder

You sort-of can and sort-of can't.

It really ought to work, but threading relies in position zeroing at
the index. Encoders just do this, but stepgens don't AFAIK.

Basically the lack of index-enable in stepgen causes a problem with
this configuration.

I think that this has been solved on the forum, and I can think of
ways to do it in HAL, but it rather feels like something that should
be built in to stepgen.

If there is an actual one pulse-per-rev signal provided by the machine
then it's not so hard. Otherwise it is easier with 1:1 gearing and a
bit of a puzzle with not-1:1

This is all as I remember it, there might be things that I am unaware
of that are relevant.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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[Emc-users] step/dir driven spindle and rigid tapping

[Ralph Stirling]

I'm helping a friend with a TMC1000 retrofit, and we
put a nice brushless servo on the spindle instead of
the old universal motor.  He is using LCNC with
plain parallel port stepper control.  I'm setting up the
spindle as step/dir, since he doesn't have analog output.
He especially wants to be able to do rigid tapping.

I believe I can use the stepgen counts or position-fb
in place of a spindle encoder, since his parallel port
won't count pulses from the 10k/rev encoder on the
motor very well.  My question is about scaling.

I have set the servo drive to be 3600 pulses/rev.
I put the stepgen into velocity mode, then net
stepgen velocity-cmd to motion.spindle.speed-out.
Now I need to connect the stepgen position to
motion.spindle.revs, but what scaling is needed?
Should I set stepgen position-scale to 3600 and
net stepgen position-fb to motion.spindle.speed-out?

Will this work, or are there other problems I haven't thought of?

Thanks,
-- Ralph

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Re: [Emc-users] Auxiliary axis DRO only

[Ralph Stirling]

You don't need a joint at all.  You can just have an encoder
channel that doesn't connect to any joint.  You can then
net encoder.xx.count to your display widget.  You could also
net a button widget to encoder.xx.reset to reset the count.
If you are wanting to scan into a point cloud, you could use
halsampler to capture the x, y, z encoder or stepgen counts
and probe encoder counts to a file.

I used this method to map errors of a stepper leadscrew actuator
with a 1um linear encoder borrowed out of an ancient manual
CMM.

-- Ralph

From: Thaddeus Waldner [thadw...@gmail.com]
Sent: Thursday, February 24, 2022 8:43 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Auxiliary axis DRO only

CAUTION: This email originated from outside the Walla Walla University email 
system.


> That is likely because motion is aware its moving, but there is no
> feedback of a signal showing that it has moved to show motion it is
> following orders.  I have a pair of 100 ppr dials on my sheldons
> replacement apron, which I use to drive it since there are no cranks on
> mine, motors having replaced the cranks.  And I just spent 20 mins
> studying my hal file to find that coupling, but that hal file is now
> several years old, and apparently not well enough commented to let me get
> my ancient head back into what I was thinking back then. At 87, can I
> plead oldtimers?

I suspect you connected them as MPGs, as that would be the most logical thing 
to do. I don’t think I want MPGs because the axis need to move during NC moves.

Perhaps if I were more clear as to what the purpose is of this axis …

I plan to use this axis with the linuxCNC probe features to automatically 
record the profile of a surface as the Y axis moves across that surface. The 
probe will have a roller on the end, which will be held in contact of the 
surface by gravity or a spring.

At this point, I am trying to find the correct hook to feed the 
position/velocity from the encoder into the joint, as Gene suggested, to get 
rid of the following error. Do I even need the stepgen? Can I have a joint 
without a motor? Can I configure the joint to ignore the following error and 
still get good position feedback?

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Re: [Emc-users] F-Engrave and LinuxCNC scripting

[Ralph Stirling]

If you wanted totally automated, you could use linuxcncrsh.
Ngcgui or pyngcgui sound like they might be useful for this
too.  Otherwise, overwriting the single file (or copying over)
doesn't sound like that bad of an idea.

-- Ralph


From: andy pugh [bodge...@gmail.com]
Sent: Wednesday, February 23, 2022 2:33 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] F-Engrave and LinuxCNC scripting

CAUTION: This email originated from outside the Walla Walla University email 
system.


On Wed, 23 Feb 2022 at 17:58, mar...@r-bechtold.de  wrote:
>
> in the past I programmed single letters as gcode.

Yes, I have done the same thing for numbers to engrave scale rings.

This time I am using F-engrave and a cxf font that I created
specifically for the job at hand.

(CXF is easy, just a set of lines and arcs:
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FLinuxCNC%2Fsimple-gcode-generators%2Fblob%2Fmaster%2Fengrave%2Fcxf-fonts%2Fnormal.cxfdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cf83c84f6aef04a4ec2ff08d9f71c97e8%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637812524470660244%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=YRyLEKxM0r7xljmcRnN7o0rwSpGnG81wg9ISlUnQZZc%3Dreserved=0
)

(note how this is part of the LinuxCNC code base already)

My questions are around how best to throw G-code at LinuxCNC and have
it do the job. I think I want my Python script to be in charge, ]

The simple option is to just keep overwriting a single file, then
reload that file and run it from the LinuxCNC GUI. But in some ways I
would prefer LinuxCNC to be entirely controlled by the Python script.
That is the part I am asking about. ie how to tell LinuxCNC to load a
file and then run it. part of this can be done in the _Axis_ interface
with axis_remote
(https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flinuxcnc.org%2Fdocs%2F2.8%2Fhtml%2Fman%2Fman1%2Faxis-remote.1.htmldata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cf83c84f6aef04a4ec2ff08d9f71c97e8%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637812524470660244%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=7%2BnWb3wRTjW8Si362CY9uJbsgnHLJTD9dYnImd2PaDs%3Dreserved=0
 ) But
I am using Touchy. I was looking for a non gui-specific hook.


atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] F-Engrave and LinuxCNC scripting

[Ralph Stirling]

Are you going to engrave one part at a time, or hold them
in some array fixture?

Either way, I would probably have the python script
add preamble and postamble to initialize everything,
and in the second case, add indexing logic to step
from part to part in the array.  G-code variables and
looping make this easy enough, or the python can
do it all and just generate G0 and G1 moves for the
entire array.

-- Ralph

From: andy pugh [bodge...@gmail.com]
Sent: Wednesday, February 23, 2022 8:20 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] F-Engrave and LinuxCNC scripting

CAUTION: This email originated from outside the Walla Walla University email 
system.


So,  have a spreadsheet of words to be engraved on several dozen
identical parts.

I am pretty sure that I can write a Python script to convert the words
to G-code using F-engrave in batch mode (I have done it from the CL,
so Python parsing CSV would just be a layer on top of that).

But what's the best way to get that G-code in to LinuxCNC and
executed? F-engrave can be used as an input filter, but I don't think
that is useful here.

I think I want to parse together a G-code program using output from
F-engrave, then push that to LinuxCNC (Touchy interface, to make it
more difficult :-)

Thoughts?

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] FW: [MachCNC] Mach4 teach/record

[Ralph Stirling]

I do wish that Ethercat was truly open source from the ground up.
Beckhoff holds all the copyrights, and has an annoying association
that holds all the docs.  Membership is free, but a hassle.  I am
jumping through the hoops to join, but haven't finished yet.  A
real open source vhdl module for FPGA's would be really nice, to
avoid single source chip risks.  There are a couple of projects on
Github, but both are empty of actual source code.

What I like about Ethercat is it is truly real-time, whereas Ethernet/IP
does not guarantee timing.  The two-port daisy chain approach of
Ethercat is also very handy.

Actually, you made another suggestion that has me thinking again.
The Mesa LBP16 protocol over ethernet is typically just used to
connect a host pc to a single fpga card, which has i/o and possibly
sserial links to additional i/o.  The sserial i/o has some limitations
on speed and is best suited to pendants and coolant or tool changer
type use.  I'm wondering if a reasonably fast pc with GigE and a GigE
switch could have a number of LBP16 devices running full speed, one
device per port on the switch.  Hostmot2 already supports multiple
devices, although I've never tried using more than one per pc.

-- Ralph

From: John Figie [zephyr9...@gmail.com]
Sent: Tuesday, February 22, 2022 4:40 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] FW: [MachCNC] Mach4 teach/record

CAUTION: This email originated from outside the Walla Walla University email 
system.


Actually What I described is not exactly Ethercat but more similar to
Ethernet/IP with CIP Motion. Ethercat is not standard Ethernet and that is
why the slave requres the mictochip interface device. But if open source
master and slave implementations are available maybe that would be a good
possibility. Since an Ethercat slave does not use standard ethernet I
believe that the master tunnels other protocols through the eterncat
networks, although I think in theory both protocols might be able to exist
since Ethercat is its own ethertype so that packets can be separated form
ethernet protocols. Anyway, for a dedicated network of just I/O Ethercat
works very well. On the othehand the problem with using CIP Motion is that
you need to belong to ODVA and pay a fee to get the specification so
although they claim it is open it really doesn't seem so and I am not sure
if it could be used in an open system because then the specifications would
also be public. It would be nice if there were a simple and free open
protocol and if it were based on standard ethernet then it could be long
lasting and would be extensible to faster ethernet speeds and IP-6 if
needed.

John Figie


On Tue, Feb 22, 2022 at 5:35 PM Ralph Stirling <
ralph.stirl...@wallawalla.edu> wrote:

> I think you have just described Ethercat.  There are open source Ethercat
> master and slave implementations (soem and soes).  The slave requires a
> Microchip interface device (LAN9252).  I would like ethercat interface to
> steppers of various sizes, and may work on that this summer.
>
>

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Re: [Emc-users] FW: [MachCNC] Mach4 teach/record

[Ralph Stirling]

I think you have just described Ethercat.  There are open source Ethercat 
master and slave implementations (soem and soes).  The slave requires a 
Microchip interface device (LAN9252).  I would like ethercat interface to 
steppers of various sizes, and may work on that this summer.

-- Ralph

On Feb 22, 2022 2:42 PM, John Figie  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Interesting video and an impressive amount of work done.

I have some comments:
I think it would be nice if all of the LinuxCNC I/O could be connected
using standard ethernet and IEEE1588 for time synchronization. This means
that a servo drive needs to be developed
that has an ethernet connection to LinuxCNC. Ideally - but not necessary -
each I/O device would include an embedded switch so that 2 ports are
available and allow daisy chaining of the
I/O devices. LinuxCNC could then be run on any computer that supports
IEEE-1588 on its ethernet including the rpi4 ? It seems like there are a
lot of pieces that could be taken and then
improved on to reach this goal. There is the STMBL servo drive, Mesa
already has a simple LBP16 protocol that could be used as a starting point.
Maybe the protocol could be similar to
ODVA Ethernet/IP with CIP motion but simplified and without all of the
legacy baggage. To me it would be an interesting project to work on but
maybe too much for someone like me to do
alone.

John Figie


On Tue, Feb 22, 2022 at 1:46 PM John Dammeyer 
wrote:

> I wish I had the space to play with one of those...
>
> > -Original Message-
> > From: Martin Dobbins [mailto:tu...@hotmail.com]
> > Sent: February-22-22 10:06 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] FW: [MachCNC] Mach4 teach/record
> >
> > Hi John,
> >
> > I am a member of the Mach group from Yahoo times, I don't have the
> rights to post (don't want them either) but sometimes? the
> > discussions are interesting.  I do know the original poster has a robot
> but didn't want to use it because it is too expensive for the
> > task.
> >
> > With that in mind maybe a robot would be the best thing for this
> project- but not an expensive one:
> >
> > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DP2O8KCmVjU0data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C16ab152ac7534a4abdf808d9f6548b8d%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637811665259793423%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=OMnG80k3Gyqs2aJToWeswO97cvq3U%2BOk%2FZEYvKOzkAQ%3Dreserved=0
> >
> > Martin
> >
> > 
> > From: John Dammeyer
> >
> > Thanks Martin,
> > His question and the subsequent discussion on the MACH group has morphed
> in now discussions on whether to use closed loop
> > steppers and ethercat.   Not sure why everyone is so fond of leadshine
> closed loop steppers but what do I know.  I like my AC servos.
> >
> > A decade or more ago it was MACH3 and the ESS or USB smooth stepper or
> the EMC as it was then called.  Now it seems there are a
> > lot more CNC solutions around and the number of people even considering
> LCNC seems to have dropped.
> >
> > I'm also surprised there isn't some sort of teaching module ready to go
> for LCNC although again, really, how many even want
> > something like that.
> >
> > Much as Brian Barker might want to create a module the ultimate issue
> isn't the starting point but support a year or so later.
> > Without sales to support the work that only one client wanted that may
> leave him hi and dry.  At least a DIY LCNC solution is always
> > open source with more than one clever person ready to help.
> >
> > And since there are versions of the MESA that close the loop for servo
> control on each axis I'd think that a training version with
> > servos would be pretty easy.  But again I may be simplifying all this.
> >
> > Before I send the original poster a link to this group along with the
> say the MESA site are there any other hardware solutions that
> > would also be suitable?
> >
> > John
> >
> > > -Original Message-
> > > From: Martin Dobbins [mailto:tu...@hotmail.com]
> > > Sent: February-22-22 6:31 AM
> > > To: Enhanced Machine Controller (EMC)
> > > Subject: Re: [Emc-users] FW: [MachCNC] Mach4 teach/record
> > >
> > > John,
> > >
> > > No, the video isn't relevant to the original question, the attitude
> expressed in the video may be.  "I figured it out, it took me 5
> > > seconds, 5 months, and after I did I wondered why it took so long
> because it was so easy" . I think I know why he does that ??
> > >
> > > Some folks like figuring things out, others want someone else to do it
> for them.  The fact that you also wrote that Brian Barker
> > > (MACH4 support) is interested in writing a module that does it, along
> with the tenor of the original post might suggest that this isn't
> > a
> > > "teach a person to fish" 

Re: [Emc-users] need gcode maker

[Ralph Stirling]

I won't promise it does.  It's been a while since I last played with it.  Even 
if it doesn't, it may be possible to pretend you are machining a slot in the 
X-Z plane and use that for a lathe profile.

-- Ralph

On Feb 13, 2022 2:37 PM, Chris Albertson  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Sun, Feb 13, 2022 at 10:42 AM Ralph Stirling <
ralph.stirl...@wallawalla.edu> wrote:

> Freecad "path" workbench generates g-code toolpaths.  You can paste your
> openscad source code into freecad with the openscad workbench.
>

Will it handle this part, a lead screw?  Last I looked, Path Workbench only
did 2.5D milling.  It would be great if it would do this.  I assume you
have to use a 4-axis machine to mill a leadscrew or a CNC Lathe.It it
has been upgraded, I'll download it again and test it ou

>
> --

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] need gcode maker

[Ralph Stirling]

Freecad "path" workbench generates g-code toolpaths.  You can paste your 
openscad source code into freecad with the openscad workbench.

-- Ralph

On Feb 13, 2022 8:54 AM, gene heskett  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Greetings all;

I have composed a simple butress thread in OpenSCAD, which can save many
formats besides the .stl's I feed cura with. Those choices are shown in
this list:
STL
OFF
WRL
AMF
3MF
DXF
SVG
CSG
PDF
image (png)

The latter being what you see in the attached png images.

What is out there that can make gcode out of one of those formats,
assuming I can do some creative editing to make the bolt code carve an
18" bolt from a hard maple 2x2 being spun by a B axis as Y slowly
advances with aux tables to make the Y axis long enough on both ends on
my 6040 mill, and I till use a 60 degree engraving mill in it with a 30
degree wedge under the motor mount to tip it to make the 0 degree load
face of the thread with the side of the tool's V. I intend to make the
wedge as a hinge if I can print it rigid enough. And PETG seems like it
could be the Right Stuff.

The target of all this tom-foolery is a wood workbench vise screw. The
2nd half nut is about half done on my BIQU HX printer as I send this. So
its beginning to look do-able.

I faintly recall that inkscape had a gcode generator plugin at one time,
does anyone have a clue how well it works or if it even exists today?

Synaptic does not look promising but I installed inscape and friends
anyway, and of coarse pycam, and I just found dxf2gcode, so that got
installed.

Does anyone else have a better idea?

Thanks All;
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] who has used thin client pcs

[Ralph Stirling]

Report back on what you got and how well it works after you have it installed.  
I think a lot of people may be interested.

-- Ralph

On Feb 10, 2022 12:15 PM, andrew beck  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Yep pleased to say i got a itx fanless pc from ali

And cost was 136usd



On Fri, 11 Feb 2022, 09:10 Chris Albertson, 
wrote:

> Yes, "Mini ITX" is just a shape and a standard for where mounting holes go
> but it is a shape that is sold to a cost-sensitive market where low power
> ususage and low cost maters.  The ITX market is large enough that mass
> production drives prices down.  So it is a good fit to hobby-level machine
> control.   I would think a good place to look as Aliexpress as most of this
> stuff ships from China at very low cost.
>
> If you are never going to use the computer as an interactive desktop you
> could use a Raspberry Pi4.Then use any standard PC notebook to remote
> log-in and run the display from the notebook over WiFi.   A Pi4 is 1/2 the
> cost of the cheapest ITX board.
>
> On Thu, Feb 10, 2022 at 5:57 AM andy pugh  wrote:
>
> > On Thu, 10 Feb 2022 at 03:04, andrew beck 
> > wrote:
> > >
> > > Its just kinda hard to ship to New Zealand from UK.
> > > Anyone got a oceania source or asia
> >
> > Mini-itx is just a motherboard standard.
> >
> > mini-itx.com just happens to be a UK supplier. I often suggest using
> > their board finder, but then you can hopefully find a local supplier.
> >
> > --
> > atp
> > "A motorcycle is a bicycle with a pandemonium attachment and is
> > designed for the especial use of mechanical geniuses, daredevils and
> > lunatics."
> > — George Fitch, Atlanta Constitution Newspaper, 1912
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-usersdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C70b199fa5d204495844e08d9ecd20840%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637801209104288380%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=np9MxLvbmTwN0l%2FaG%2BA%2B6FJUP4MsIebpnhYmdf4taVY%3Dreserved=0
> >
>
>
> --
>
> Chris Albertson
> Redondo Beach, California
>
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>

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Re: [Emc-users] who has used thin client pcs

[Ralph Stirling]

Aliexpress seems to have lots of fanless mini pc's at modest
prices, so that is a possibility.  Can you get Advantech products
down there?  They have been making industrial pc's for many
years and have a decent reputation.  I think they may be Taiwanese.
A quick check on them shows their prices are kind of high though.

https://www.aliexpress.com/wholesale?SearchText=industrial+pc+fanless=true

https://buy.advantech.com/

-- Ralph

From: andrew beck [andrewbeck0...@gmail.com]
Sent: Wednesday, February 9, 2022 7:45 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] who has used thin client pcs

CAUTION: This email originated from outside the Walla Walla University email 
system.


Yeah don't that several times.  Got nothing

On Thu, 10 Feb 2022, 16:39 Ralph Stirling, 
wrote:

> Personally, I have come to like Intel NUC micro pc's, but haven't used
> them in a shop environment yet to give an unqualified endorsement.
>
> I would suggest a google search for "industrial pc fanless" and see what
> is available in your area.  Nothing magic about mini-itx, as it is just one
> of many form factors available.  Pick your i/o preference (ethernet,
> pci-e), type of ssd (sata, m2,pci-e), and see what's available to you.
>
> -- Ralph
>
>
> On Feb 9, 2022 7:00 PM, andrew beck  wrote:
> CAUTION: This email originated from outside the Walla Walla University
> email system.
>
>
> Its just kinda hard to ship to New Zealand from UK.
>
> Anyone got a oceania source or asia
>
> On Thu, 10 Feb 2022, 15:44 Chris Albertson, 
> wrote:
>
> > A CNC controller is an "off label" use case for a thin client machine.
> >  What you should be looking for is a "mini ITX" motherboard designed for
> > industrial embedded processing.   these sell new for just about $200
> with a
> > CPU soldered (not socketed) to the board.  The Intel Celeron processor
> > usually does not use a fan, except for the case fan.
> >
> > That said, these Mini-ITX board are many times what you find inside a
> "thin
> > client" PC.   The Celeron is a powerful CPU if you don't need graphics
> >
> > On Wed, Feb 9, 2022 at 6:13 PM andrew beck 
> > wrote:
> >
> > > thanks chris
> > >
> > > specifically i am thinking of running my cnc machines on them.  they
> are
> > > cheap fanless and seem to be pretty solid.
> > >
> > > but just seeing who else has gone down that way
> > >
> > > On Wed, Feb 9, 2022 at 5:58 PM Chris Albertson <
> > albertson.ch...@gmail.com>
> > > wrote:
> > >
> > > > They work well for their intended use case.   We used them at one
> > place I
> > > > worked.  All the data and the user sessions were kept on a server and
> > > then
> > > > any employees and sit down at any computer and sign-in and get back
> to
> > > the
> > > > desktop he left.   Also if one failed, there was no data loss as
> there
> > > was
> > > > not data on the PC.
> > > >
> > > > I would not use this for 3D CAD or video editing or gamming but for
> > > normal
> > > > office work and web rowing they are good.
> > > >
> > > > The trick is to match the PC to these case. I've typing this on a
> > > > "workstation" class PC, 16-cores and a decent Nvidia GPU but I only
> > have
> > > a
> > > > 256GB SDD drive installed.  All the data lives on a network storage
> > > > device.   I use this for 3D CAD, robotic simulations and  other big
> > > compute
> > > > jobs
> > > >
> > > > But of late the "thin Client" PC is become obsolete.   What we use
> now
> > at
> > > > Apple iPad.  For most people these can replace a notebook computer
> > > > especially if you have a little iPad sized keyboard for when you need
> > to
> > > > type more than a few lines of text.The iPad connects to the same
> > > > network storage (NAS) and if needed I can run an instance if
> Microsoft
> > > > Windows 10 in the NAS with the Windows desktop exported to the iPad
> > > screen
> > > >
> > > > A $200 Chromebook can work just like the iPad but is slightly less
> > > > portable.The "Thin Client" is a desktop, non-portible version of
> > > this.
> > > >
> > > > A very w-cost chin client PC can be made by attaching a Raspberry Pi4
> > to
> > > > the back of any flat screen monitor with some double s

Re: [Emc-users] who has used thin client pcs

[Ralph Stirling]

Personally, I have come to like Intel NUC micro pc's, but haven't used them in 
a shop environment yet to give an unqualified endorsement.

I would suggest a google search for "industrial pc fanless" and see what is 
available in your area.  Nothing magic about mini-itx, as it is just one of 
many form factors available.  Pick your i/o preference (ethernet, pci-e), type 
of ssd (sata, m2,pci-e), and see what's available to you.

-- Ralph


On Feb 9, 2022 7:00 PM, andrew beck  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Its just kinda hard to ship to New Zealand from UK.

Anyone got a oceania source or asia

On Thu, 10 Feb 2022, 15:44 Chris Albertson, 
wrote:

> A CNC controller is an "off label" use case for a thin client machine.
>  What you should be looking for is a "mini ITX" motherboard designed for
> industrial embedded processing.   these sell new for just about $200 with a
> CPU soldered (not socketed) to the board.  The Intel Celeron processor
> usually does not use a fan, except for the case fan.
>
> That said, these Mini-ITX board are many times what you find inside a "thin
> client" PC.   The Celeron is a powerful CPU if you don't need graphics
>
> On Wed, Feb 9, 2022 at 6:13 PM andrew beck 
> wrote:
>
> > thanks chris
> >
> > specifically i am thinking of running my cnc machines on them.  they are
> > cheap fanless and seem to be pretty solid.
> >
> > but just seeing who else has gone down that way
> >
> > On Wed, Feb 9, 2022 at 5:58 PM Chris Albertson <
> albertson.ch...@gmail.com>
> > wrote:
> >
> > > They work well for their intended use case.   We used them at one
> place I
> > > worked.  All the data and the user sessions were kept on a server and
> > then
> > > any employees and sit down at any computer and sign-in and get back to
> > the
> > > desktop he left.   Also if one failed, there was no data loss as there
> > was
> > > not data on the PC.
> > >
> > > I would not use this for 3D CAD or video editing or gamming but for
> > normal
> > > office work and web rowing they are good.
> > >
> > > The trick is to match the PC to these case. I've typing this on a
> > > "workstation" class PC, 16-cores and a decent Nvidia GPU but I only
> have
> > a
> > > 256GB SDD drive installed.  All the data lives on a network storage
> > > device.   I use this for 3D CAD, robotic simulations and  other big
> > compute
> > > jobs
> > >
> > > But of late the "thin Client" PC is become obsolete.   What we use now
> at
> > > Apple iPad.  For most people these can replace a notebook computer
> > > especially if you have a little iPad sized keyboard for when you need
> to
> > > type more than a few lines of text.The iPad connects to the same
> > > network storage (NAS) and if needed I can run an instance if Microsoft
> > > Windows 10 in the NAS with the Windows desktop exported to the iPad
> > screen
> > >
> > > A $200 Chromebook can work just like the iPad but is slightly less
> > > portable.The "Thin Client" is a desktop, non-portible version of
> > this.
> > >
> > > A very w-cost chin client PC can be made by attaching a Raspberry Pi4
> to
> > > the back of any flat screen monitor with some double sided mounting
> tape.
> > >
> > > But, bottom like is these are CLIENT side devices.  The compete and
> > storage
> > > is some place else.  Thee mostly provide screen and keyboard and very
> > > limited local computing.
> > >
> > >
> > > Al that said.  it is very easy to getcome spoild with "my screen and
> data
> > > follows me" style computing
> > >
> > > On Wed, Feb 9, 2022 at 4:05 PM andrew beck 
> > > wrote:
> > >
> > > > hey everyone
> > > >
> > > > just wondering who has used the thin client computers
> > > > i am looking for a fanless pc that i can buy in oceania
> > > >
> > > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DtVXn_fEbDTsdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cfea26bc2297042a4174408d9ec418470%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637800588405689506%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=V%2FmWo6LXCmOf2rZnYNtx5oBUpqxzQ47p758QDbYgdtE%3Dreserved=0
> > > >
> > > > ___
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> > > > Emc-users@lists.sourceforge.net
> > > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-usersdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cfea26bc2297042a4174408d9ec418470%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637800588405689506%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=pJqbTFpNi1ubleguKkhjkiMN1QBAM8YbtTEJsIm%2Fgcg%3Dreserved=0
> > > >
> > >
> > >
> > > --
> > >
> > > Chris Albertson
> > > Redondo Beach, California
> > >
> > > ___
> > > Emc-users mailing list
> > > 

Re: [Emc-users] can I hide the nativecam interface

[Ralph Stirling]

Well, I suspect what Andrew was asking was whether Native CAM will generate 
toolpaths and g-code for lathes.  There seems to be a lot of discussion about 
nativecam on the forum, and I see mention of lathe mode, so I think "yes".

-- Ralph

On Jan 27, 2022 1:07 PM, fxkl47BF--- via Emc-users 
 wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Fri, 28 Jan 2022, andrew beck wrote:

> Hey can you use native cam on a lathe??
>
> On Fri, 28 Jan 2022, 07:03 fxkl47BF--- via Emc-users, 
>  wrote:
>   I started playing with nativecam.
>   It's pretty neat.
>   With linuxcnc running is there a way to "hide" the nativecam interface?

As far as I know it can only be used on a computer.



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[Emc-users] miniature taper-lock type pulleys

[Ralph Stirling]

I had some problems today with a small XL timing
pulley slipping on a NEMA17 stepper shaft due to
the set screw loosening after running for long
periods (multiple days).  I drilled and tapped a
second set screw hole, and I can probably apply
some thread locker, but I got to wondering if it
would be possible to make a miniature taper lock
type bushing and pulley to clamp onto a stepper
shaft.  Anybody ever seen anything like that?

The original taper lock system has a split bushing
with an 8 degree taper against the pulley.  They
also have a clever set screw arrangement to tighten
the pieces together and to jack them apart when
removing.  If you haven't used them before, a video
is the best way to understand them:
https://www.youtube.com/watch?v=-3K_vf_7fhM

I like to 3d print my timing pulley perimeters, but
a metal hub is nice (as has been discussed on here
in the past).  I'm pondering how I could make hybrid
pulleys with a taper locking hub.  Threading the holes
in the plastic pulley wouldn't work so well.  Perhaps
some threaded metal insert can be incorporated from
the back side.

Enough of my musings.  Looking forward to hearing
other ideas and suggestions.

-- Ralph

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Re: [Emc-users] 60's vintage position feedback.. (GE Accupins)

[Ralph Stirling]

I would suggest starting with a more capable microcontroller.  I like the $15 
Adafruit ItsyBitsy M4 modules, which are programmable with the Arduino IDE, but 
have a 120MHz clock, 32 bit timers, floating point hardware, and two 1Mhz 12bit 
adc's.  Their processor is an ATSAMD51 (Cortex M4).  The original Uno is very 
limited for precision timing.

-- Ralph

On Jan 21, 2022 6:02 AM, Sam Sokolik  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


My plan is to use the 16 bit timer on the arduino to trigger on the input
square wave rising edge and then count until it see's the return wave
form rising edge. (the return waveform will get converted to a square
wave)  Atleast that is the plan...

SO - I guess it comes down to how accurate the phase relationship is
between the 2 signals and how high a frequency you are using to count
between edgees...

On Fri, Jan 21, 2022 at 3:00 AM andy pugh  wrote:

> On Fri, 21 Jan 2022 at 08:54, andy pugh  wrote:
>
> > You might be able to do a lot better than that if you can find a way
> > to have the Arduino set timers on interrupts.
> > (How fast does the Arduino run a polling loop?)
>
> I haven't watched the video yet (I am in a meeting :-) but I am not
> clear on how the sampling rate relates to the positional accuracy.
>
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and Stepper motors.

[Ralph Stirling]

Linuxcnc with the bldc component can certainly drive an induction
motor or other 3-phase motor as a variable frequency drive, but I
have never heard the term "VFD" used for driving two-phase steppers
before.  What Andy was suggesting, and what I looked up, was doing
the full FOC drive of steppers (or 3-phase motors for that matter)
with Linuxcnc directly.  The bldc hal component does the relevant
calculations already.  The only slightly tricky part is measuring
phase current.  You could use an A/D converter with SPI interface
to the Mesa FPGA, but it is still harder than grabbing analog values
in a microcontroller.

Personally, I am more interested in the approach you've been
advocating for years, of having a microcontroller per motor handling
commutation and drive, with the Linuxcnc/Mesa setup sending
step/direction pulses or communicating via sserial or Ethercat with
each motor.  I've built a number of mosfet bridge boards for 2 or 3-phase
drive of small motors which have been good enough for in-house use,
and it isn't too difficult.  Making them bullet-proof for other end-users
to connect to their own motors and power supplies would require some
design hardening.

The bldc hal component is great for experimenting with driving brushless
motors, though, if you don't need phase current feedback in your control
scheme.

-- Ralph

From: Chris Albertson [albertson.ch...@gmail.com]
Sent: Wednesday, January 12, 2022 6:57 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and 
Stepper motors.

CAUTION: This email originated from outside the Walla Walla University email 
system.


Thanks, this might be of value to someone who wants a VFD for the cost of a
few h-bridges.

On Wed, Jan 12, 2022 at 6:35 PM Ralph Stirling <
ralph.stirl...@wallawalla.edu> wrote:

> The bldc.c component computes the two-phase sin/cos
> terms from phase angle, but I don't think it outputs them,
> so a very slight modification would be necessary.  The sin/cos
> output values would be connected to PWM inputs in hostmot2,
> which would generate the actual signals for two H-bridges to
> switch the motor phases.  The Mesa card generates the high
> speed PWM.  A 1kHz servo thread should be sufficient for
> computing the sin/cos values.  Here are the relevant lines in
> bldc.c:
>
> sintheta = sin(phase_angle * pi2);
> costheta = cos(phase_angle * pi2);
> A_value = out_abs * costheta;
> B_value = out_abs * (costheta * cos120 + sintheta *
> sin120);
> C_value = out_abs * (costheta * cos120 - sintheta *
> sin120);
>
> The sintheta and costheta are appropriate for two-phase steppers,
> and the A, B, and C_values are for three-phase bldc motors.
>
> The sintheta and costheta values could be multiplied by the output
> of a PID loop to adjust the amplitude based on torque or velocity
> requirements.  Bldc connects to an encoder counter to track rotor angle.
>
> -- Ralph
> 
> From: Chris Albertson [albertson.ch...@gmail.com]
> Sent: Wednesday, January 12, 2022 5:41 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC
> and Stepper motors.
>
> CAUTION: This email originated from outside the Walla Walla University
> email system.
>
>
> So how would I connect the four wire stepper motor to my PC to allow for
> software commutation and continuous rotation of a stepper?
>
> If this works, it could save people money by eliminating the need for a VFD
> spindle drive and also
> People are paying quite a lot for these self-contained "closed-loop
> steppers"If this can already be done in software how?
>
> But I have serious doubts a Linuc PC has good enough timing even with an RT
> kernel.   But in theory, how to connect the stepper?
>
>
> On Wed, Jan 12, 2022 at 1:26 AM andy pugh  wrote:
>
> > On Wed, 12 Jan 2022 at 01:28, Chris Albertson  >
> > wrote:
> >
> > >   This library would allow the stepper to be commanded
> > > as if it were a serial interfaced servo motor.
> >
> > In principle so does LinuxCNC HAL and the "bldc" HAL component.
> >
> > --
> > atp
> > "A motorcycle is a bicycle with a pandemonium attachment and is
> > designed for the especial use of mechanical geniuses, daredevils and
> > lunatics."
> > — George Fitch, Atlanta Constitution Newspaper, 1912
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> >
> https://nam12.safelinks.protection.

Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and Stepper motors.

[Ralph Stirling]

The bldc.c component computes the two-phase sin/cos
terms from phase angle, but I don't think it outputs them,
so a very slight modification would be necessary.  The sin/cos
output values would be connected to PWM inputs in hostmot2,
which would generate the actual signals for two H-bridges to
switch the motor phases.  The Mesa card generates the high
speed PWM.  A 1kHz servo thread should be sufficient for
computing the sin/cos values.  Here are the relevant lines in
bldc.c:

sintheta = sin(phase_angle * pi2);
costheta = cos(phase_angle * pi2);
A_value = out_abs * costheta;
B_value = out_abs * (costheta * cos120 + sintheta * sin120);
C_value = out_abs * (costheta * cos120 - sintheta * sin120);

The sintheta and costheta are appropriate for two-phase steppers,
and the A, B, and C_values are for three-phase bldc motors.

The sintheta and costheta values could be multiplied by the output
of a PID loop to adjust the amplitude based on torque or velocity
requirements.  Bldc connects to an encoder counter to track rotor angle.

-- Ralph

From: Chris Albertson [albertson.ch...@gmail.com]
Sent: Wednesday, January 12, 2022 5:41 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and 
Stepper motors.

CAUTION: This email originated from outside the Walla Walla University email 
system.


So how would I connect the four wire stepper motor to my PC to allow for
software commutation and continuous rotation of a stepper?

If this works, it could save people money by eliminating the need for a VFD
spindle drive and also
People are paying quite a lot for these self-contained "closed-loop
steppers"If this can already be done in software how?

But I have serious doubts a Linuc PC has good enough timing even with an RT
kernel.   But in theory, how to connect the stepper?


On Wed, Jan 12, 2022 at 1:26 AM andy pugh  wrote:

> On Wed, 12 Jan 2022 at 01:28, Chris Albertson 
> wrote:
>
> >   This library would allow the stepper to be commanded
> > as if it were a serial interfaced servo motor.
>
> In principle so does LinuxCNC HAL and the "bldc" HAL component.
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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--

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

[Ralph Stirling]

That is a great video.  I may have to assign that to future
manufacturing classes to watch.  Quite a collection of
AutomationDirect servos he has there.  I hope they are
sponsoring him.

-- Ralph

From: John Dammeyer [jo...@autoartisans.com]
Sent: Thursday, January 6, 2022 12:29 AM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

CAUTION: This email originated from outside the Walla Walla University email 
system.


Anyone looked at this guy and his robot arm etc.  Nice to see someone else 
makes almost as many mistakes as I do.
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DT3fl1FIKEQodata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C3089a4c0b4604dbe31ff08d9d0eec008%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637770546129586569%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=RwA%2BbY152sk4UwK9c3PSuZd9vr%2F8cXY9HTqEjrYBBRc%3Dreserved=0


> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: January-05-22 5:58 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC 
> bridge.
>
> The current repository is "machinekit-hal".   They only work on HAL.  There
> are no CNC apps in the current repository. All the stuff for running CNC
> equipment is removed now.When the developers moved from "machinekit" to
> "machinekit-hal" they abandoned all the CNC-related stuff.  It is all on
> GitHub, go look.
>
> But it does seem to be actively developed although the last update was
> almost two weeks ago.   I think someone took a Christmas break.
>
> If I had to guess what Tormach does, it would be to use their own
> closed-source "Path Pilot" app along with HAL from Machine kit.   But I'm
> guessing.They are funding the ROS2 work.
>
> Someone asked, "What is ROS2?" It is the planner and motion controller
> that is now probably the most-used.The part of ROS used for
> manipulators (arms) is called "MoveIt" and a Google search will turn up
> information on MoveIt.Motion planning is harder with a robot arm
> because they don't usually run pre-programmed code.   In the CNC world the
> motion path is designed when the g-code is written.  But robot controls
> have to do this in real time as the world around them changes.
>
> When the palletizing robot lifts a box to be placed on a pallet the box
> might be in a different location and of course the pallets are placed more
> or less randomly wherever the human forklift driver left it.  Even a pick
> and place robot has to find the parts which might be loose-packed in a open
> bin.   Moveit is open source and integrated with ROS.   ROS is larger
> "Robot Operating System" that includes things for communications, driving
> wheeled robots and other stuff like MoveIt.
>
> Not using MoveIt to move a robot arm is like saying  "LCNC is too complex,
> I'll just write my own code on an Arduino to read g-code and generate steps
> for my 4-axis mill."  You could, maybe, but it would take more than a few
> days.
>
> For those who like looking at interesting robots here is a video from 2019,
> these have been improved but are not moving boxes in warehouses.  You can
> see that the task they are doing can't be pre-programmed.   Really this is
> not much more than a CNC mill.  The wheels but the machine in (X,Y and the
> orange suction cup-thing is like a spindle that moves in Z, it just
> operates in a larger space than a mill table
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2F5iV_hB08Unsdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C3089a4c0b4604dbe31ff08d9d0eec008%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637770546129586569%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=r5AL1TZ8n0IqFWJabDRC0jGMKUK657NxrlPXaJNzA88%3Dreserved=0
>
>
>
>
> On Wed, Jan 5, 2022 at 11:49 AM Ralph Stirling <
> ralph.stirl...@wallawalla.edu> wrote:
>
> > The newest version of Machinekit separates "emc" from hal,
> > and permits their hal to compile with standard Linuxcnc 2.8
> > if I recall correctly.  Their focus has always been on the
> > hal end of things rather than gui's and cnc machining.
> >
> > I can't find the email post that explained this, and the machinekit
> > documentation is rather sparse, so how one actually installs
> > things with current LinuxCNC high level code and Machinekit
> > hal code, I couldn't tell you.
> >
> > -- Ralph
> > 

Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

[Ralph Stirling]

The newest version of Machinekit separates "emc" from hal,
and permits their hal to compile with standard Linuxcnc 2.8
if I recall correctly.  Their focus has always been on the
hal end of things rather than gui's and cnc machining.

I can't find the email post that explained this, and the machinekit
documentation is rather sparse, so how one actually installs
things with current LinuxCNC high level code and Machinekit
hal code, I couldn't tell you.

-- Ralph

From: Rob C [rclandro...@gmail.com]
Sent: Wednesday, January 5, 2022 10:53 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

CAUTION: This email originated from outside the Walla Walla University email 
system.


I was also confused by machine kit reference from tormach.  I thought
tormach was based on linuxcnc and not the machine kit branch/fork

although I guess if Tormach are running a 2.7 linuxcnc version I guess you
could say they have their own branch/fork

I would have thought that since the change to python 3 with linuxcnc that
will be quite a divergent change to linuxcnc that will make it difficult to
integrate any items pushed back to 2.7

On Wed, 5 Jan 2022, 18:38 John Dammeyer,  wrote:

> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> >
> > On Wed, Jan 5, 2022 at 3:29 AM Gregg Eshelman via Emc-users <
> > emc-users@lists.sourceforge.net> wrote:
> >
> > > That repeatability is plenty good enough to drop work into an automatic
> > > holding fixture (which does the final precision positioning) then pick
> the
> > > pieces out for transfer to another manufacturing stage or into a box.
> > >
> >
>
> > As it turns out, for all the really hard tasks, +/- a quarter-inch
> (0.25")
> > is accurate enough.  You only need 0.001 inches for the simple no-brain
> > jobs.   So my point is that you can do a LOT with the cheaper 3D printed
> > plastic version of this robot.
> >
> > I'm surprised there are not more people here working on robots.  hey are
> > very much like CNC tools but more interesting.
> >
>
> I'm headed in that direction once I get the power drawbar working to my
> satisfaction.  I had considered using one of the Size24 Steppers with 50:1
> planetary drives to replace the butterfly impact wrench.  Easy enough to
> track turns with an encoder on the back of the motor and let it stall when
> target torque is reached with software control of motor torque.  Then to
> remove use full torque for required number of turns.
>
> Then the tool changer.  To me a robot arm seemed more useful since I'm
> using TTS and R8 tooling.  Lining up the R8 is possible because the spindle
> has step/dir so the spindle could be rotated until the R8 tool slips up the
> key.
>
> Anyway, my Ball Bearing Jacobs Chuck with R8 weighs in at 1.7kg without
> tooling so I think a 3D printed version of this arm is probably just a bit
> undersize along with the planetary gearboxes not being 0 backlash.
>
> You're right.  His software is minimal but still the entire project as
> open source is impressive.  Few people are doing it to that level even if
> he's earning income off the metalwork and part sets which comes to over $1k
> if you buy his metal and bearing and parts sets along with the
> StepperOnline motors and gearboxes.
>
> But still it's interesting other than I'd much rather dedicated a Pi4 and
> LCNC to it.  With no idea where to start since I don’t' even know what
> ROS2 is and am confused as to why Tormach is using the MachineKit version
> instead of LCNC.  I thought MachineKit had stalled and was no longer used.
>
> John
>
>
>
>
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Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

[Ralph Stirling]

That AR3 robot is indeed interesting.  In the event
that anyone else wants to know the specs on the
robot, here is what I found on page 298 of the manual:

Reach – 24.75 inches (62.9cm)
Payload – 4.15 lbs (1.9kg)
Repeatability - .2mm
Robot weight (aluminum) – 27lbs (12.25kg)
Enclosure weight – 12.5lbs (5.6kg)
Max Power Consumption – 8.25amp (198 watts)

Reach and payload are decent, but repeatability is 10x
worse than typical industrial arms.  Still a very intriguing
system.  Not sure I envy the designer trying to support
buyers of his kits though.  There are an awful lot of bits
and pieces and assembly steps.

-- Ralph

From: Rob C [rclandro...@gmail.com]
Sent: Tuesday, January 4, 2022 10:25 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

CAUTION: This email originated from outside the Walla Walla University email 
system.


Interesting looking at the AR2/AR3
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.anninrobotics.com%2Fdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cc2fc608fe31b49905c3e08d9cfaf96e2%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637769175325588286%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=1OEAmYT8Al3yGr6i5FuTXiRgXEF2oNOsibOvSqLdrTg%3Dreserved=0

On Tue, 4 Jan 2022 at 18:14, andy pugh  wrote:

> On Tue, 4 Jan 2022 at 17:41, Robin Szemeti via Emc-users
>  wrote:
> >
> > Out of interest, how is PathPilot related to LinuxCNC?
>
> It's LinuxCNC with their own GUI on top. But maybe v2.7 as I don't
> _think_ that they have the joints-axes changes in.
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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Re: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

[Ralph Stirling]

Tormach has an interesting 6-axis robot fully controlled by ROS,
and multiple CNC machines running Linuxcnc/Machinekit, so it
makes perfect sense for them to integrate the two worlds better.

I also find this to be an excellent development.  Frankly, I'd enjoy
trading our two Yaskawa Motoman robots for a couple of these
new Tormach arms to get that ROS integration.  Yaskawa has a
very tortuous and limited solution for ROS that we never got to
work.

-- Ralph

From: Chris Albertson [albertson.ch...@gmail.com]
Sent: Sunday, January 2, 2022 7:26 PM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Tormach writing open sorce ROS2/Machiekit/LCNC bridge.

CAUTION: This email originated from outside the Walla Walla University email 
system.


Has anyone else noticed the activity on Tormach's Git Hub repository.
 There seem to be multiple commits each day to
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftormach%2Fhal_ros_control%2Ftree%2Ffoxy-develdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C2cb70e771b614bbd867d08d9ce68e5aa%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637767772215404228%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=sP5t%2FV3obq1Z6YWdI3gnSuhW6xiUeg35znj%2BUCSoei4%3Dreserved=0

In a nutshell, they are making HAL a ROS2 node.From a LNCN user's view
point this means machine tool can become part of a larger automated robotic
system and from the robotic engineer's view this means he can use the HAL
infrastructure to control robot parts.

Interesting because it is Tormach not some hobby user working part-time.
It is in Tormach's github.

I can imagine a work cell where robots load and unload milling machines or
move parts between machines and then pack the finished parts in boxes.
Then palletize the boxes and load them onto self-driving trucks that carry
them to a "lights out" factory where they make robots.   We all become
redundant.

More seriously,  this about doubles what each group can do.  And Tormach
seems to be investing real money in this.







--

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] Harmonic Drive

[Ralph Stirling]

The secret to importing scad files into FreeCAD is to go
to the OpenSCAD workbench, click OpenSCAD -> Add OpenSCAD element,
paste in the text from the scad file into the dialog box,
and click "Add".  From then on it is just a FreeCAD model.

-- Ralph

From: John Dammeyer [jo...@autoartisans.com]
Sent: Monday, December 20, 2021 10:53 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] Harmonic Drive

CAUTION: This email originated from outside the Walla Walla University email 
system.


I installed Gene's CAD program and exported as STL because FreeCAD didn't 
recognize the format.  Or I did something wrong.  The generated STL file 
wouldn't export as a STEP file in either FreeCAD nor Fusion360.

John

> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: December-20-21 10:29 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Mon, Dec 20, 2021 at 5:35 PM gene heskett  wrote:
>
> > On Monday, December 20, 2021 7:03:21 PM EST John Dammeyer wrote:
> > > Perhaps save it as a step file or iges.  I can't read that scad file.
> >
>
> > I don't think it can output those non-free formats.
> >
>
> STEP is an ISO standard and
> IGES is a U.S. National Bureau of Standards format.
>
> Of the two, STEP is more widely universal as "everyone" can read STEP files.
>
> Also, as said, FreeCAD can import and run SCAD and then can do things like
> add fillets and report or even, generate code for milling.
>
> I think SCAD is great for making parts that can be algorithmically
> defined.   But I'd
> hate to have to make an organic shape like a automotive body or a power
> tool.
> o it's good to be able to move designs between tools.   STEP is the best
> for that.
>
> Chris Albertson
> Redondo Beach, California
>
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Re: [Emc-users] Harmonic Drive

[Ralph Stirling]

FreeCAD can input OpenSCAD files and then export
step or iges files.  Before I got more comfortable with
FreeCAD, I would design my part in OpenSCAD, read
the scad file into FreeCAD and then apply fillets before
exporting.  Fillets have historically been a real pain in
OpenSCAD (not sure if they have new methods).

-- Ralph

From: gene heskett [ghesk...@shentel.net]
Sent: Monday, December 20, 2021 5:32 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Harmonic Drive


On Monday, December 20, 2021 7:03:21 PM EST John Dammeyer wrote:
> Perhaps save it as a step file or iges.  I can't read that scad file.

I don't think it can output those non-free formats.

OpenSCAD exports an .stl, ready for cura.. And if you go clear to the bottom
of the downloads page the December release is available as an AppImage which
doesn't need anything else to run except in this case, the latest glibc. There
are earlier versions in case your install is buster or older. Runs on mac's
and winderz too. I don't think there's anything in my code that won't run on
the earlier January 2021 AppImage though. OpenSCAD is under steady
development, getting faster and better with each new release. The .scad file
is pure text, editable in any editor worth calling an editor. That leaves
gedit out, but geany works well as does its own editor.


> > -Original Message-
> > From: gene heskett [mailto:ghesk...@shentel.net]
> > Sent: December-20-21 3:10 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Harmonic Drive
> >
> > On Monday, December 20, 2021 1:49:18 PM EST Chris Albertson wrote:
> > > Yes, he used maybe 30 pounds of metal parts.   And I only saw a few
> > > degrees
> > > of rotation in the video, run it for 100 hours and see what happens.
> > > Flex
> > > is what kills the plastic so after 100 hours it will have had a few
> > > million
> > > cycles.   But still it is 99% made of metal.
> > >
> > > I want to see a 100% plastic unit stand up to 100 hours of use.  It can
> > > be
> > > done but not if the plastic parts flex.
> >
> > Yes it can be done, the drive I posted the openscad file for last week,
> > made out of petg, has been sitting on my kitchen counter, running at 400
> > to 600 rpms input, since the middle of September.  How many hours is that
> > assuming a 24 hr day?
> >
> > > On Mon, Dec 20, 2021 at 10:39 AM Sam Sokolik  wrote:
> > > > Did you watch this video til the end?  I time stamped it.
> > > >
> > > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2FeW1GGI55Epc%3Ft%3D878data=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cc48b8062a70346cc9c6e08d9c421c8eb%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637756471663573305%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=ctfixojKZGmwad6Y00oNXojrOy4V4zok470xvKgpGRY%3Dreserved=0
> > > >
> > > > sam
> > > >
> > > >
> > > >
> > > > On Mon, Dec 20, 2021 at 12:26 PM Chris Albertson <
> > > > albertson.ch...@gmail.com>
> > > >
> > > > wrote:
> > > > > On Fri, Dec 17, 2021 at 6:05 PM Sam Sokolik 
wrote:
> > > > > > Hmm - seems we are making things a bit more complicated than they
> > > > > > need
> > > >
> > > > to
> > > >
> > > > > > be..  Why didn't the simple flex gear work ok?   You need to make
> > > > > > the
> > > > > > system with fine enough splines that the flexure is at a
> > > > > > minimum...
> > > > >
> > > > > You
> > > > >
> > > > > > can lower the backlash to a minimum by applying a small amount of
> > > > > > pressure to the system.
> > > > >
> > > > > The problem with small splines is that he is making this with
> > > > > printed
> > > > > plastic.   There is a minimum feature size that works.  Seriously
> > > > > you
> > > >
> > > > want
> > > >
> > > > > to stay above module 0.5 and bigger if you can.   Mod 1.0 is more
> > > > > realistic  There are two reasons.  (1) plastic is not very strong
> > > > > unless
> > > > > you make the parts big and (2) the printer makes parts with
> > > > > dimensional
> > > > > tolerances of about 0.4 mm so if your parts have 1mm features you
> > > > > can
> > > > > expect 50% dimensional errors.  That said, modulo 1.0 gears work
> > > > > really
> > > > > well.  Smaler ones have a short life.
> > > > >
> > > > > Finally ANY flexing at all is the death of printed parts.  They fail
> > > > > by
> > > >
> > > > the
> > > >
> > > > > failure of interlayer adhesion.  Think of printed plastic like it is
> > > > > soft
> > > > > pine wood.  When making gears from yellow pine, the direction of the
> > > >
> > > > grain
> > > >
> > > > > matters a lot and no one would think of making module 0.5 gears with
> > > >
> > > > pine.
> > > >
> > > > > I've been able to build an entire CNC conversion kit for a mini-mill
> > > > > from
> > > > > printed plastic.  The stuff is VERY rigid and strong if you make the
> > > >
> > > > parts
> > > >
> > > > > large enough
> > > > >
> > > > > 

[Emc-users] Prox sensors and wiring

[Ralph Stirling]

I have finally started stripping out the control cabinet on my cnc mill in 
preparation for my retrofit.  The brushed servos and mechanical limit and home 
switches were wired up with crimped "bullet" quick connect pins.  I'm replacing 
the servos with brushless servos, and am considering replacing the mechanical 
switches with inductive prox sensors (pnp, nc type).  All the old wires are 
sticky with coolant and metal chips.

So, I am interested to hear what other lcnc retrofitters have found works well 
for modest priced coolant proof connectors (3 or 4 pin), and opinions on cheap 
Chinese prox sensors (since the name brand ones are so expensive, even on 
ebay).  An example is: 
https://www.ebay.com/itm/US-5Pcs-NC-PNP-LJ18A3-8-Z-AY-Inductive-Proximity-Sensor-Switch-DC6V-36V-/143861840692

Photos (rather unorganized) of the retrofit are at: 
https://photos.app.goo.gl/yBSRVf3QAVUK39PC7

Thanks,
-- Ralph

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Re: [Emc-users] Mesa 7i90 as remote sserial

[Ralph Stirling]

Am I once again trying for something untested?
Is it possible to use a 7i90hd as a high speed
sserial remote (2.5Mb, not the 115kb) with
configurations other than straight gpio?

Thanks,
-- Ralph

From: Ralph Stirling
Sent: Sunday, October 24, 2021 11:11 AM
To: emc-users@lists.sourceforge.net
Subject: Mesa 7i90 as remote sserial

I'm interested in using the 7i90hd as an sserial remote, 
but am having trouble pulling all the pieces together to 
build a configuration.  I will ultimately need four servo 
channels (encoder and pwm), three MPG channels, and 
a bunch of discrete i/o.  I may split this up into two or 
three 7i90 ssremotes for the cleanest system organization, 
but one sample config should give me enough information 
to make the others.  In addition to making the bitstream, I 
need to make a hal file, and haven't seen quite enough 
documentation to do that either.

Thanks again,
-- Ralph


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[Emc-users] Mesa 7i90 as remote sserial

[Ralph Stirling]

I'm interested in using the 7i90hd as an sserial remote, but am having trouble 
pulling all the pieces together to build a configuration.  I will ultimately 
need four servo channels (encoder and pwm), three MPG channels, and a bunch of 
discrete i/o.  I may split this up into two or three 7i90 ssremotes for the 
cleanest system organization, but one sample config should give me enough 
information to make the others.  In addition to making the bitstream, I need to 
make a hal file, and haven't seen quite enough documentation to do that either.

Thanks again,
-- Ralph

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Re: [Emc-users] Panasonic serial encoder interface

[Ralph Stirling]

Hi Chris,

My student originally bought two of these Denso robots to improve his 
production line for 3d printer filament.  Spool handling and the like.  His 
filament business was very busy, and then it tanked.  He is now back in school 
to finish the engineering degree he started 15 years ago or so.  He is taking 
my Manufacturing Systems class right now.  He is an EE, and this class is 
geared to ME's.  There is another EE in it too, so I was going to have them do 
a bit different project than the 12 ME's.  My student had the idea to drag in 
his Denso, and getting it going should be a great project for them.  Two ME 
teams are using Yaskawa Motoman arms. The project for the ME's involves 
uncapping, filling, and recapping glass vials, a process inspired by some of 
our bioengineering work.  If we get the Denso going soon enough, they may be 
able to apply it to this project too.

-- Ralph

On Oct 22, 2021 8:35 PM, Chris Albertson  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Just curious, what will this robot do when it is finished?

On Fri, Oct 22, 2021 at 10:20 AM Ralph Stirling <
ralph.stirl...@wallawalla.edu> wrote:

> They are in a Denso robot, and the robot controller directly
> reads the encoders.  Several fpga's on the main board.  We
> don't have the big cable that connects the controller to the
> arm, unfortunately, but may try to cobble together one
> channel to see if we can capture communication between
> the controller and the encoder.  All the batteries were dead,
> so all stored info is gone.
>
> -- Ralph
> 
> From: Todd Zuercher [to...@pgrahamdunn.com]
> Sent: Friday, October 22, 2021 6:44 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Panasonic serial encoder interface
>
> Are you using the Panasonic servo drives that go with the motors and
> encoders?  How are you commanding them?  Depending on the command interface
> you may not need to deal with reading the encoders directly or even at
> all.  The drives will do that for you and maybe even send out a position
> signal linuxcnc is capable of reading for feedback.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: Ralph Stirling 
> Sent: Thursday, October 21, 2021 11:14 PM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Panasonic serial encoder interface
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> We are digging into a 2002-vintage Denso 6-axis robot, with a Linuxcnc
> conversion in mind.  The joint motors on this robot appear to have
> Panasonic encoders with a four wire interface and a fair amount of
> circuitry inside each encoder.  I suspect that these are the same as the
> ones in this EEVblog thread:
>
>
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Fprojects%2Finterfaceprotocol-to-encoder-on-panasonic-servo-motor%2Fdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C169b8dac86224119ea1608d995d61ba0%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637705569101438469%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=m0nfs2Z%2BkuQFy8E6DjAqxlQUh4ASIK0VUE2xchqn1oY%3Dreserved=0
>
> A rather terse comment at the end of that thread suggests that these are
> 2.5Mbaud async RS485 communications:
>
>2.5MBps RZ 8N1 RS485
>0x52 comes from drive - seems encoder reset.
>changes afterwards to 0x2a - read encoder command
>
> We already determined that ours are using RS485, so this seems to confirm
> we are looking at right things.  Anybody ever tried interfacing such
> encoders to LCNC?
>
> Thanks,
> -- Ralph
>
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>


--

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] Panasonic serial encoder interface

[Ralph Stirling]

They are in a Denso robot, and the robot controller directly
reads the encoders.  Several fpga's on the main board.  We
don't have the big cable that connects the controller to the
arm, unfortunately, but may try to cobble together one
channel to see if we can capture communication between
the controller and the encoder.  All the batteries were dead,
so all stored info is gone.

-- Ralph

From: Todd Zuercher [to...@pgrahamdunn.com]
Sent: Friday, October 22, 2021 6:44 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Panasonic serial encoder interface

Are you using the Panasonic servo drives that go with the motors and encoders?  
How are you commanding them?  Depending on the command interface you may not 
need to deal with reading the encoders directly or even at all.  The drives 
will do that for you and maybe even send out a position signal linuxcnc is 
capable of reading for feedback.

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Ralph Stirling 
Sent: Thursday, October 21, 2021 11:14 PM
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Panasonic serial encoder interface

[EXTERNAL EMAIL] Be sure links are safe.

We are digging into a 2002-vintage Denso 6-axis robot, with a Linuxcnc 
conversion in mind.  The joint motors on this robot appear to have Panasonic 
encoders with a four wire interface and a fair amount of circuitry inside each 
encoder.  I suspect that these are the same as the ones in this EEVblog thread:

https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Fprojects%2Finterfaceprotocol-to-encoder-on-panasonic-servo-motor%2Fdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C665f7f0c23a742ef04e708d9956f225a%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637705126827244953%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=RYymtPoDjeH8QREN4liUgmrumfSUAtmFaHB3rvb4Bmg%3Dreserved=0

A rather terse comment at the end of that thread suggests that these are 
2.5Mbaud async RS485 communications:

   2.5MBps RZ 8N1 RS485
   0x52 comes from drive - seems encoder reset.
   changes afterwards to 0x2a - read encoder command

We already determined that ours are using RS485, so this seems to confirm we 
are looking at right things.  Anybody ever tried interfacing such encoders to 
LCNC?

Thanks,
-- Ralph

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[Emc-users] Panasonic serial encoder interface

[Ralph Stirling]

We are digging into a 2002-vintage Denso 6-axis robot,
with a Linuxcnc conversion in mind.  The joint motors
on this robot appear to have Panasonic encoders with
a four wire interface and a fair amount of circuitry
inside each encoder.  I suspect that these are the same
as the ones in this EEVblog thread:

https://www.eevblog.com/forum/projects/interfaceprotocol-to-encoder-on-panasonic-servo-motor/

A rather terse comment at the end of that thread
suggests that these are 2.5Mbaud async RS485 communications:

   2.5MBps RZ 8N1 RS485
   0x52 comes from drive - seems encoder reset.
   changes afterwards to 0x2a - read encoder command

We already determined that ours are using RS485, so this
seems to confirm we are looking at right things.  Anybody
ever tried interfacing such encoders to LCNC?

Thanks,
-- Ralph

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Re: [Emc-users] Shortening motor shafts

[Ralph Stirling]

I'll be doing the clamp shaft/cut shaft approach.  I don't
want to do the adapter plate, because the face of the
motor is already exactly right for the holes and precision
bore.  I will need to make some new shaft couplers though,
as the only shaft was 14mm and the new one is 19mm,
and the shaft coupler clamp screws won't permit reboring.
It is a rigid coupler, so should be easy to make new ones.

Thanks for all the ideas everybody.

-- Ralph

From: andrew beck [andrewbeck0...@gmail.com]
Sent: Monday, October 18, 2021 2:21 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Shortening motor shafts

CAUTION: This email originated from outside the Walla Walla University email 
system.


Same here

 yeah clamp shaft.  Cut with cut off blade, done. 5 min job.

Or make a 5mm thick adapter plate.  And rotate holes 10 degrees. Also very
easy.   This is probably what I would do unless the motor pcds are already
fitting to motor frame which is unlikely.

On Tue, 19 Oct 2021, 03:39 dave engvall,  wrote:

> I use 1/16" grinding discs all the time for such. I think I'd arrange to
> clamp the shaft  not the motor frame so as to
> reduce vibration on the bearings. It it amazing what those discs will do
> at reasonable speeds.
>
> Dave
>
> On 10/17/21 10:27 PM, andrew beck wrote:
> > Quick and easy way is to use a 1mm cutting disc on a angle grinder.
> >
> > Slightly harder option is put it in a mill,
> >
> > clamp the shaft and cut 5mm off
> >
> > Just don't bang on shaft and you will be sweet.
> >
> > I would definitely not take them apart that's a headache
> >
> >
> > On Mon, 18 Oct 2021, 18:12 Ralph Stirling, <
> ralph.stirl...@wallawalla.edu>
> > wrote:
> >
> >> I just got a great deal on three 750w brushless servos and drives to
> >> upgrade my cnc mill.  They have the same face dimensions, but the shafts
> >> are 5mm longer than the old brush servos. There was no clearance between
> >> the motor shaft and ball screw inside the coupler, so I need shorten the
> >> 32mm long 19mm diam shafts by 5mm.  Can this be done without damage to
> the
> >> motor from heat or vibration?  I don't want to have to pull the ball
> screws.
> >>
> >> Thanks,
> >> -- Ralph
> >>
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[Emc-users] Shortening motor shafts

[Ralph Stirling]

I just got a great deal on three 750w brushless servos and drives to upgrade my 
cnc mill.  They have the same face dimensions, but the shafts are 5mm longer 
than the old brush servos. There was no clearance between the motor shaft and 
ball screw inside the coupler, so I need shorten the 32mm long 19mm diam shafts 
by 5mm.  Can this be done without damage to the motor from heat or vibration?  
I don't want to have to pull the ball screws.

Thanks,
-- Ralph

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Re: [Emc-users] Replacing a handle.

[Ralph Stirling]

I wish that the polyjet resin printer technology would
reach the consumer market.  We were given a Stratasys
Eden 500V polyjet printer last year (originally a $200K
machine), and it lays down 16 micron thick layers with
42 micron horizontal resolution.  Parts are solid.  Build
envelope is huge (500 x 400 x 200mm), but resin is $0.20/g.
Post processing is just scraping and washing off support
material (with water).  No goosebumps from model supports
to remove.  Support material is also $0.20/g.  Resin comes
in 3.6kg cartridges, so I don't stock multiple colors...  It
is amazingly fast though.  One small part was 38min to
print one, and 2hr45min to print 40 more (as a batch).

-- Ralph

From: Bruce Layne [linux...@thinkingdevices.com]
Sent: Wednesday, October 13, 2021 10:58 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Replacing a handle.

CAUTION: This email originated from outside the Walla Walla University email 
system.


On 10/13/21 12:03 PM, Martin Dobbins wrote:
> Bruce Layne wrote:
>
> Someone needs to make an upgraded MSLA printer that automates the post
> processing operations.
>
> I'll pull the trigger when they do, Bruce.

I think of the current state of resin 3D printing as similar to the
early days of photography - nearly magical, but there is some
inconvenient slopping of chemicals to make the magic work.  We need the
3D printing equivalent of digital photography with all of the magic,
instant gratification, and without the messy chemicals.

However, a little rinsing with isopropyl alcohol, air drying, and UV
exposure to cure the surface is a minor price to pay for the resin 3D
printing magic.  It's SO much easier to CAD a structural part and resin
print it than it is to use CNC to make the part.  I complain about the
IPA rinse, but it's much faster and easier than cutting raw stock,
fixturing, breaking end mills, tool changes, clearing chips, multiple
fixture setups, tumble deburring, etc.   As an added bonus, I can 3D
print parts that can't be made by CNC or injection molding.  Small parts
can be arrayed and they 3D print as quickly as a single part when using
MSLA where the entire layer is exposed. Resin printing is an incredibly
powerful tool in my engineering toolbox.

> Do you have an MSLA right now? What model?

I have a Qidi Shadow 5.5S and a Qidi S Box.  Both are budget resin
printers that do a good job, but there are probably better options now.
We're still fairly early in the MSLA technological development.  Prices
are falling as the quality and features improve.

I've had good results with Saraya Tech ABS-Like resin.  It prints well
at the printer's default settings.  I hung some parts outside in direct
sunlight all summer and there was no degradation in strength or loss of
aesthetics.  The quality of the available resins is quickly improving
too.  I'm hoping the supply catches up to the increasing demand and the
prices fall to a penny a gram.

Resin printing is enabling a lot of small businesses to make great niche
products that wouldn't be viable if they required expensive high volume
injection molding.

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Re: [Emc-users] Square holes

[Ralph Stirling]

That's Sam Sokolik's specialty.  He has a number of amazing
youtube videos of his experiments.  Here is his channel:

https://www.youtube.com/user/samcoinc/videos

-- Ralph

From: ken.stra...@gmail.com [ken.stra...@gmail.com]
Sent: Monday, September 20, 2021 11:38 AM
To: 'Enhanced Machine Controller (EMC)'
Subject: [Emc-users] Square holes

CAUTION: This email originated from outside the Walla Walla University email 
system.


Recently (a nebulous concept as one gets older) there was a thread about
milling square and other shaped holes using synchronized motion of the
spindle and X/Y. I tried searching the list archive but am obviously not
using the right search terms. Help, please?



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Re: [Emc-users] Heidenhain IBV 610 troubles

[Ralph Stirling]

A lot of very high resolution, and older encoders have
sine wave gratings, which give sine and cosine waveforms
on the A and B channels.  These are connected to an
interpolator box that contains A/D converters and logic
to generate quadrature pulses.  The higher the interpolation
ratio, the lower the max velocity allowed.

-- Ralph

From: Gene Heskett [ghesk...@shentel.net]
Sent: Saturday, September 18, 2021 5:22 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Heidenhain IBV 610 troubles

I don't think you have an encoder, but a resolver. If you are getting one
sinesoid per full turn, its a resolver.

> Anyhow it doesn't work and I'm not sure how to troubleshoot the black
> box. I have the manuals and I have tried various combinations of the
> dip swithches inside.
>
> does anyone have any troubleshooting tips or stories about their use
> of an interpolater box?
>
>
> Thanks,
>Curt
>
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Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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[Emc-users] 7c81 vhdl questions

[Ralph Stirling]

I'm having trouble figuring out which FPGA I/O pins
are connected to tx0, rx0, tx1, and rx1 for the two
RS422 connectors on the 7c81.  I don't see any of
those pins in the UCF file, so they must be tied to
gpio somewhere else.  Grepping for TX0 in the *_34.vhd
pin files seems to give a variety of I/O pins assigned
to sserial tx0 pins (IO 04, 05, 10, 15, 21, 27 according
to the comments).  I'm missing a link in the chain somewhere.

Thanks,
-- Ralph

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[Emc-users] New zero backlash gearbox

[Ralph Stirling]

This might inspire some of you.

https://www.wittenstein-us.com/zero-backlash-galaxie-gearbox/

-- Ralph



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Re: [Emc-users] splicing teeny wires

[Ralph Stirling]

This may not help you in this situation, but for connecting wiring
in the #26-#22 range, especially small steppers, I like using
TE/Amp MTA-100 IDC connectors.  I watched ebay for a while
to get a crimper at a reasonable price, but these have been
reliable for me and super fast to install.  The connectors are
cheap.  I use extended length 0.1" headers to join cables.  The
mta-100's also plug right onto standard headers on pcb's.

https://gab.wallawalla.edu/~ralph.stirling/projects/linuxcnc/photos/IMG_20210820_092102762.jpg

https://gab.wallawalla.edu/~ralph.stirling/projects/linuxcnc/photos/IMG_20200427_114032797.jpg


-- Ralph

On Aug 20, 2021 8:41 AM, Gene Heskett  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Friday 20 August 2021 10:50:29 andy pugh wrote:

> On Fri, 20 Aug 2021 at 14:53, Gene Heskett 
wrote:
> > If you know of an even smaller splice, and the tool for it, I'd sure
> > appreciate being advised.
>
> When space is tight I use solder and heat-shrink.

I do too Andy, but there might be 30 such joints in a 2" cube so I need
something really miniature. Too many times the heat shrink has slid off.
After seeing how prusa makes an umbilical cord out of theirs, with good
anchoring on both ends, and the creality haveing very poor anchoring, as
in none on the carriage originally, I'm trying to improve it a bit at
the same time. The CR10-S Pro V2 does very nice work, for about half an
hour at PETG temps, then starts leaking because the hot end of the
capricorn bowden tube is going away. So I'm putting a volcano version of
the E3D V6 hotend on it, with a Sherpa direct drive on top of the
volcano. Had to design and make a mount, for both that and the BLTouch.
OPenscad feeding to a MK3S Prusa makes that easy peasy.

Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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Re: [Emc-users] jerk control

[Ralph Stirling]

I've also been hoping to see this appear in a Linuxcnc update,
as it has been worked on by a number of people for years.
Here are the most recent threads about jerk-limited trajectory planning:

https://forum.linuxcnc.org/24-hal-components/40152-jerk-limited-trajectory-planner-hal-component

https://forum.linuxcnc.org/38-general-linuxcnc-questions/34666-c2-smooth-velocity-profile?start=0

-- Ralph

From: David Berndt [ber...@uberwin.com]
Sent: Tuesday, August 17, 2021 9:01 AM
To: Enhanced Machine Controller (EMC); andrew beck
Subject: Re: [Emc-users] jerk control

CAUTION: This email originated from outside the Walla Walla University email 
system.


I don't have a great need for it with my machines, or the time/brains to
implement it. It just seems like a feature we really should have.

  I'd be willing to participate monetarily in some sort of system to
incentivize the inclusion of jerk control. Perhaps an open-source feature
bounty? Does the community want to consider that sort of thing?

-Dave

On Mon, 16 Aug 2021 23:06:05 -0400, andrew beck 
wrote:

> hey guys
>
> I am sitting here watching my cnc mill atm its shaking quite a bit
> acceleration is 600mm/sec2  which is not that high i think.  compared to
> every other cnc mill i have used with a commercial controller.  they have
> jerk control and work much better.  so looking forward to when we get
> jerk
> control here on linuxcnc!
>
> but in the mean time i need a poor mans jerk control and thinking of a
> limit on the pid output to chop down the initial acceleration for the
> first
> moment in time just so little moves don't shake it to death
>
> andy mentioned that I could maybe use a limit component to limit the
> initial acceleration for the first tiny moment in time to cut down on the
> vibrations.
>
> how do you guys think that could work?
>
> Regards
>
> Andrew
>
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Re: [Emc-users] M62/M63 with a pwm output possible?

[Ralph Stirling]

I'm also an EE.  Class D audio amplifiers are filtered PWM.  A motor inductance 
also filters pwm to an analog value.  Your laser modulation input likely low 
pass filters the pwm as well.

-- Ralph

On Aug 13, 2021 2:25 PM, Dave Matthews  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


I come from an electronics background and am used to looking at a scope so
have always considered PWM as a digital control mode.  I'll take a look for
examples of how to set up a pwm pin in HAL.  My initial setup was done with
StepConf so I let it do all of the work to set up a spindle pwm pin.

Thanks.

Dave

On Fri, Aug 13, 2021 at 5:21 PM Ralph Stirling <
ralph.stirl...@wallawalla.edu> wrote:

> PWM *is* analog (0 to 1.0).  In hal, you would connect motion.analog_out
> (syntax likely wrong, going by memory) to a pwm value input.  That would
> feed the M67 value to your pwm.
>
> -- Ralph
>
> On Aug 13, 2021 2:09 PM, Dave Matthews  wrote:
> CAUTION: This email originated from outside the Walla Walla University
> email system.
>
>
> I saw a lot of references to using the M67 but couldn't see how it would
> apply as it is for analog outputs.  I thought that would be for something
> like the 0-10 volt spindle control.  I was looking at the M62 because I
> thought a PWM output would be considered a digital pin.  Am I looking at it
> wrong?  The laser is PWM between 0 and 5v.
>
> Dave
>
> On Fri, Aug 13, 2021 at 4:34 PM Todd Zuercher 
> wrote:
>
> > You might need to use M67 to set the PWM value and M62 to turn it on/off.
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.
> > 630 Henry Street
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
> >
> > -Original Message-
> > From: Dave Matthews 
> > Sent: Friday, August 13, 2021 4:16 PM
> > To: Enhanced Machine Controller (EMC) 
> > Subject: [Emc-users] M62/M63 with a pwm output possible?
> >
> > [EXTERNAL EMAIL] Be sure links are safe.
> >
> > I recently started playing with lightburn and want to do photos.  Using
> > M3/M5 Sxxx for laser control works fine for following lines but not for
> > photos.  I think that I want to use M62 along with an Sxxx for laser on
> and
> > power setting.  The laser power is controlled by PWMing the on/off pin.
> >
> > Lightburn likes to use M106 and an S number for laser control.  I think
> it
> > is coming from M106 being used for fan on a Marlin 3d printer board.
> > Find/Replace M03 in place of the M106 sort of works but It does a laser
> > on, move, laser off so there is a lot of overburn.
> >
> > Sample gcode from Lightburn:
> > ; Image @ 2500 mm/min, 20% power
> > M8
> > M106 S0
> > G0X1.8487 Y0.8204 F0
> > ; Layer C01
> > M106 S0
> > G1X0.041 F98.425
> > M106 S20
> > G1X0.29
> > M106 S0
> > G1X0.041
> > M106 S0
> >
> > From the docs it looks like M62 would do the job if I can also use the
> > Sxxx to set the pwm.
> >
> > Questions
> >
> > - Is it possible to set up the digital pin associated with the M62 to be
> a
> > PWM output?
> > - Is there an example of how to do this?
> >
> > Dave
> >
> > ___
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> >
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Re: [Emc-users] M62/M63 with a pwm output possible?

[Ralph Stirling]

PWM *is* analog (0 to 1.0).  In hal, you would connect motion.analog_out 
(syntax likely wrong, going by memory) to a pwm value input.  That would feed 
the M67 value to your pwm.

-- Ralph

On Aug 13, 2021 2:09 PM, Dave Matthews  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


I saw a lot of references to using the M67 but couldn't see how it would
apply as it is for analog outputs.  I thought that would be for something
like the 0-10 volt spindle control.  I was looking at the M62 because I
thought a PWM output would be considered a digital pin.  Am I looking at it
wrong?  The laser is PWM between 0 and 5v.

Dave

On Fri, Aug 13, 2021 at 4:34 PM Todd Zuercher  wrote:

> You might need to use M67 to set the PWM value and M62 to turn it on/off.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: Dave Matthews 
> Sent: Friday, August 13, 2021 4:16 PM
> To: Enhanced Machine Controller (EMC) 
> Subject: [Emc-users] M62/M63 with a pwm output possible?
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> I recently started playing with lightburn and want to do photos.  Using
> M3/M5 Sxxx for laser control works fine for following lines but not for
> photos.  I think that I want to use M62 along with an Sxxx for laser on and
> power setting.  The laser power is controlled by PWMing the on/off pin.
>
> Lightburn likes to use M106 and an S number for laser control.  I think it
> is coming from M106 being used for fan on a Marlin 3d printer board.
> Find/Replace M03 in place of the M106 sort of works but It does a laser
> on, move, laser off so there is a lot of overburn.
>
> Sample gcode from Lightburn:
> ; Image @ 2500 mm/min, 20% power
> M8
> M106 S0
> G0X1.8487 Y0.8204 F0
> ; Layer C01
> M106 S0
> G1X0.041 F98.425
> M106 S20
> G1X0.29
> M106 S0
> G1X0.041
> M106 S0
>
> From the docs it looks like M62 would do the job if I can also use the
> Sxxx to set the pwm.
>
> Questions
>
> - Is it possible to set up the digital pin associated with the M62 to be a
> PWM output?
> - Is there an example of how to do this?
>
> Dave
>
> ___
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Re: [Emc-users] Something went wrong.

[Ralph Stirling]

To elaborate a little more, your description sounds a bit like G42 cutter 
compensation, described in 
https://linuxcnc.org/docs/2.8/html/gcode/tool-compensation.html .

-- Ralph

On Aug 2, 2021 6:12 AM, Ralph Stirling  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Cutter compensation enabled?

On Aug 1, 2021 7:26 PM, John Dammeyer  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


The milling operation was set up to always be climb milling. Zero point for the 
center hole and the outside perimeter was the same.  And yet it milled more 
away on the LH side.

The piece was tightly clamped and did not move.  The width of the perimeter on 
the RHS is correct with the outer diameter at 45mm and the inner hole at 32.5mm.

ie. At the RHS it's 6.25mm wide and on the LHS it's 4mm so it's the milling of 
the outer that shifted.  The inner circle is pretty well round.  Not as good as 
a boring tool but still round.

The inner hole was done after the outer perimeter.

Very odd and I don't understand why.  LinuxCNC and the motor drives did not 
throw up any faults.
S1100
Feed was 307mm/min with 1/4" 2 flute cutter.
Total depth was 3.2mm and depth per pass 0.9mm.
WD-40 and compressed air.

John



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Re: [Emc-users] Something went wrong.

[Ralph Stirling]

Cutter compensation enabled?

On Aug 1, 2021 7:26 PM, John Dammeyer  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


The milling operation was set up to always be climb milling. Zero point for the 
center hole and the outside perimeter was the same.  And yet it milled more 
away on the LH side.

The piece was tightly clamped and did not move.  The width of the perimeter on 
the RHS is correct with the outer diameter at 45mm and the inner hole at 32.5mm.

ie. At the RHS it's 6.25mm wide and on the LHS it's 4mm so it's the milling of 
the outer that shifted.  The inner circle is pretty well round.  Not as good as 
a boring tool but still round.

The inner hole was done after the outer perimeter.

Very odd and I don't understand why.  LinuxCNC and the motor drives did not 
throw up any faults.
S1100
Feed was 307mm/min with 1/4" 2 flute cutter.
Total depth was 3.2mm and depth per pass 0.9mm.
WD-40 and compressed air.

John



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Re: [Emc-users] electrical inspection pain

[Ralph Stirling]

Nobody's told me I can't install a little heatpump, and I'm
not going looking.  I don't plan on messing with the
refrigerant myself though.  I have a good friend (mech engr)
that I can call on, who spent a decade or so installing and 
maintaining refrigeration systems for a supermarket.  I have
also talked to a friend that owns an HVAC company in town,
and he is willing to do the commissioning on the system
after I've installed everything (for a few hundred $ I suspect).
The system I've ordered has the refrigerant in the outside unit.

-- Ralph

From: Gregg Eshelman via Emc-users [emc-users@lists.sourceforge.net]
Sent: Wednesday, July 28, 2021 6:47 PM
To: Enhanced Machine Controller (EMC)
Cc: Gregg Eshelman
Subject: Re: [Emc-users] electrical inspection pain

CAUTION: This email originated from outside the Walla Walla University email 
system.


How picky are they in Washington about DIY HVAC? I looked up the relevant code 
for Idaho and for doing an install on your own residence you don't need a 
"certificate of competency" but may need to have the install pass a mechanical 
inspection. (But many HVAC shop techs will insist that ALL such work must be 
done by a certified technician.)

There are a couple of companies that make DIY mini split heat pumps but their 
special refrigerant line sets only come in 16 and 25 foot lengths. I need maybe 
five feet between where I want to put the inside and outside units. For the 
other makes and models they have all the refrigerant contained within the 
outside unit and the refrigerant lines use flared ends and threaded fittings. 
Assemble the system, pull a vacuum on the service port. Close the service valve 
and disconnect the vacuum pump. Remove the caps off the refrigerant valves and 
fully open them with a hex key (usually comes with the system) then reinstall 
the valve caps. Wait around 5 minites to ensure the refrigerant has distributed 
through the pipes and inside unit and you're finished, aside from setting it up 
on WiFi and installing the app on your phone, if it has such features.

The DIY kits don't need a vacuum pump because the lines are either precharged 
or vacuumed and they have valves installed on their ends which open as they're 
screwed onto the other components.
NEC code requires a disconnect near the outside unit, placed not more than 6 
feet above ground level. Curiously, there's no minimum height above ground 
level for the disconnect. Rather odd how the NEC code can be so lax and vague 
on some things but very exacting on others.

I happen to have a very good Gast rotary vane vacuum pump that can pull 29 
inches of mercury. Just need to come up with the right fitting to put on the 
end of the hose. I've used it on some vehicle air conditioners, take the car to 
an AC shop to have the r134a pulled out, bring it home, do what parts need 
replaced, pull the vacuum myself then back to the AC shop to have it refilled 
because jumpering wires to the compressor clutch is a bit of a pain to make it 
draw in from the little cans. $25 to suck the refrigerant out, $25 to put it 
back in plus whatever for additional refrigerant if needed.

I can get a 15K BTU mini split heat pump for well under $1K, shouldn't have to 
pay some guy another few hundred just to bring out a vacuum pump for a couple 
of hours then open two valves.

The heat pump currently in use for the part of the house served by ductwork was 
installed over a decade ago and all the company used was a vacuum pump to 
evacuate the lines. After a couple of hours the tech took the pump off and 
opened the refrigerant valves. It had a 10 year parts warranty and about a week 
less than 10 years later the compressor quit. Installing the new compressor was 
what required the refrigerant recovery system and weighing how much new r410a 
was put back in. Got nicked $1000 for that for labor and new refrigerant when 
they should have only charged for the labor and any additional refrigerant that 
may have been required above what was pulled out.
Automotive AC shops will at least credit the value of extracted refrigerant 
because if they don't put the same stuff back in they'll use it on another job.


   On Wednesday, July 28, 2021, 6:28:32 PM MDT, Ralph Stirling 
 wrote:
 I just got my inspection report by email.  The inspector
couldn't even remember that it was a mill, and called it
a "lathe".  He references RCW 19.28 and WAC 296-46B-903.

I think my best option is to use this as an excuse to buy
a phase converter.  It will be UL approved, and I'll connect
it to the 220 circuit.  It should serve as the "load" as far as
the inspector is concerned.  I don't want to start lying
about my machinery and intentions.  A phase converter
for testing and repairing 3ph machines is legitimate enough.
I'll either tarp my CNC mill in place as Chris suggested, or
move it temporarily ($250 for forklift rental twice).

The mill is a 1998 Frenc

Re: [Emc-users] electrical inspection pain

[Ralph Stirling]

I just got my inspection report by email.  The inspector
couldn't even remember that it was a mill, and called it
a "lathe".  He references RCW 19.28 and WAC 296-46B-903.

I think my best option is to use this as an excuse to buy
a phase converter.  It will be UL approved, and I'll connect
it to the 220 circuit.  It should serve as the "load" as far as
the inspector is concerned.  I don't want to start lying
about my machinery and intentions.  A phase converter
for testing and repairing 3ph machines is legitimate enough.
I'll either tarp my CNC mill in place as Chris suggested, or
move it temporarily ($250 for forklift rental twice).

The mill is a 1998 French Realmeca C2, with absolutely no
labels of any sort on it.  Good electrical diagram, but that
carries no weight.

Thanks for all the advice, everybody.  I'll update when I
finally pass.  I need another visit after I finish installing
my ductless heat pump anyway.

-- Ralph


From: Bari [bari00...@gmail.com]
Sent: Wednesday, July 28, 2021 3:06 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] electrical inspection pain

CAUTION: This email originated from outside the Walla Walla University email 
system.


Replace mill with UL approved saw or similar for $100 off CL (if you
don't already have one). Call for inspection.

On 7/28/21 2:14 PM, Ralph Stirling wrote:
> I'm in a bind now.  I just had the electrical wiring I put
> into my garage shop inspected.  The WA state inspector
> liked my wiring fine, but balked at the non-UL-listed
> CNC mill (the main point to my whole garage shop project).
> He insists it get stamped by one of the *seven* official
> "approved engineers" for the state of WA before he can
> sign off on my electric.  I suspect that the field approval
> would cost considerably more than my entire mill (1998
> vintage French 5hp spindle, 300x200x300mm travels,
> $5K).  Didn't matter to him that the new VFD is listed.
>
> Any other US-based, especially WA-based LinuxCNC
> retrofitters faced this problem successfully?
>
> Thanks,
> -- Ralph
>
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[Emc-users] electrical inspection pain

[Ralph Stirling]

I'm in a bind now.  I just had the electrical wiring I put
into my garage shop inspected.  The WA state inspector
liked my wiring fine, but balked at the non-UL-listed
CNC mill (the main point to my whole garage shop project).
He insists it get stamped by one of the *seven* official
"approved engineers" for the state of WA before he can
sign off on my electric.  I suspect that the field approval
would cost considerably more than my entire mill (1998
vintage French 5hp spindle, 300x200x300mm travels,
$5K).  Didn't matter to him that the new VFD is listed.

Any other US-based, especially WA-based LinuxCNC
retrofitters faced this problem successfully?

Thanks,
-- Ralph

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Re: [Emc-users] Question on how to determine tool movement direction

[Ralph Stirling]

This is like a drag knife control.  I recall people doing that
with Linuxcnc before.  I think your angle would just be
atan2(y velocity, x velocity).

-- Ralph

From: Leonardo Marsaglia [ldmarsag...@gmail.com]
Sent: Friday, July 23, 2021 10:46 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Question on how to determine tool movement direction

Hello guys,

I'm thinking about using a rotary nozzle around the tool on the router to
just follow the path the cutter is doing and vacuum clean all the dust and
swarf it leaves on the grooves so it's easier to maint the table clean for
the next job.

One quick question I want to ask is: Is there an easy way to determine the
direction of the movement vector of the tool to accommodate for direction
changes so I can align that nozzle that turns around the tool with the
direction of the cut?

My idea is to make all this mechanism as simple as possible with a 3d
printed structure and a little stepper to quickly rotate the nozzle to
follow the path of the cut.

If there's no easy or quick way of determine the direction (I thought may
be there's a debugging tool or way to read this kind of data) I plan to
make a custom component to constantly compare where the tool is going and
at wich speed so I can triangulate the angle and that way move the nozzle
in the right direction.

What do you think of this?

Thanks as always!

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Re: [Emc-users] OT Fanuc!

[Ralph Stirling]

Good to know, Phil.  I don't have any burning questions at
the moment, but they could crop up at any moment.

The NVX is mapps IV.

-- Ralph

From: Feral Engineer [theferalengin...@gmail.com]
Sent: Friday, July 16, 2021 12:53 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] OT Fanuc!

CAUTION: This email originated from outside the Walla Walla University email 
system.


I'm in New Jersey but I can help with anything applications related you may
have questions with. Is it a mapps 4 or 5 machine?

Phil T.
The Feral Engineer

Check out my LinuxCNC tutorials, machine builds and other antics at
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On Fri, Jul 16, 2021, 3:49 PM Ralph Stirling 
wrote:

> No mapps on the Dura.  The NVX has mapps.  Are you in
> Davis?  Our NVX was serial number 1, donated from Davis.
> They bought our Haas TM-1 as a trade-in and shipped us
> the NVX.  Only tech support I can get on it is from engineers
> at Mori Mfg in Davis, since the 800 tech support line has no
> information about this unit.
>
> -- Ralph
> 
> From: Feral Engineer [theferalengin...@gmail.com]
> Sent: Friday, July 16, 2021 12:22 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] OT Fanuc!
>
> CAUTION: This email originated from outside the Walla Walla University
> email system.
>
>
> Yeah we only made those for a few years. Not a big seller. Good machine but
> limited in options and the NL/NLX is just a better seller. You have the
> straight fanuc or mapps overlay?
>
> You'll never guess who I work for 
>
> Phil T.
> The Feral Engineer
>
> On Fri, Jul 16, 2021, 3:10 PM Ralph Stirling <
> ralph.stirl...@wallawalla.edu>
> wrote:
>
> > This Dura is a 2007 model.  I haven't tried G20 since
> > we first got it going, so don't recall exactly what the
> > issues were, but remember being very startled when
> > all the offsets were suddenly wrong when G20 was called.
> > Solution was instant and total metrification for cnc
> > machining in my lab :-).  Since few of my students have
> > any significant prior experience machining, they don't
> > generally grumble about giving up "thou's".
> >
> > The other Fanuc quirk that catches them is forgetting
> > decimal points on whole numbers.  X10 is 10microns
> > not 10mm, while X10.0 is 10mm.  It's turned a few
> > parts into big spiral chips on the finishing pass.
> >
> > -- Ralph
> > 
> > From: Feral Engineer [theferalengin...@gmail.com]
> > Sent: Friday, July 16, 2021 11:55 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] OT Fanuc!
> >
> > CAUTION: This email originated from outside the Walla Walla University
> > email system.
> >
> >
> > On the dura, is the issue that it just moves the decimal instead of
> > converting the values? That's just a parameter change.
> >
> > I don't recall the dura using tc controls, i thought those started with
> td?
> > I may be wrong, it's been a while since i saw one of those in the wild.
> >
> > Phil T.
> > The Feral Engineer
> >
> > Check out my LinuxCNC tutorials, machine builds and other antics at
> >
> >
> > Help support my channel efforts and coffee addiction:
> >
> >
> > On Fri, Jul 16, 2021, 2:21 PM Ralph Stirling <
> > ralph.stirl...@wallawalla.edu>
> > wrote:
> >
> > > I forbid G20 on the Mori Duraturn in my lab for that exact reason.  It
> > has
> > > a Fanuc 0i-TC.  I figure 21st century engineering students should
> develop
> > > some feel for metric measurements anyway.  Just to be safe I also
> require
> > > G21 on our Mori NVX mill even though it uses a Mits control that
> handles
> > it
> > > better.

Re: [Emc-users] OT Fanuc!

[Ralph Stirling]

No mapps on the Dura.  The NVX has mapps.  Are you in
Davis?  Our NVX was serial number 1, donated from Davis.
They bought our Haas TM-1 as a trade-in and shipped us
the NVX.  Only tech support I can get on it is from engineers
at Mori Mfg in Davis, since the 800 tech support line has no
information about this unit.

-- Ralph

From: Feral Engineer [theferalengin...@gmail.com]
Sent: Friday, July 16, 2021 12:22 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] OT Fanuc!

CAUTION: This email originated from outside the Walla Walla University email 
system.


Yeah we only made those for a few years. Not a big seller. Good machine but
limited in options and the NL/NLX is just a better seller. You have the
straight fanuc or mapps overlay?

You'll never guess who I work for 

Phil T.
The Feral Engineer

On Fri, Jul 16, 2021, 3:10 PM Ralph Stirling 
wrote:

> This Dura is a 2007 model.  I haven't tried G20 since
> we first got it going, so don't recall exactly what the
> issues were, but remember being very startled when
> all the offsets were suddenly wrong when G20 was called.
> Solution was instant and total metrification for cnc
> machining in my lab :-).  Since few of my students have
> any significant prior experience machining, they don't
> generally grumble about giving up "thou's".
>
> The other Fanuc quirk that catches them is forgetting
> decimal points on whole numbers.  X10 is 10microns
> not 10mm, while X10.0 is 10mm.  It's turned a few
> parts into big spiral chips on the finishing pass.
>
> -- Ralph
> 
> From: Feral Engineer [theferalengin...@gmail.com]
> Sent: Friday, July 16, 2021 11:55 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] OT Fanuc!
>
> CAUTION: This email originated from outside the Walla Walla University
> email system.
>
>
> On the dura, is the issue that it just moves the decimal instead of
> converting the values? That's just a parameter change.
>
> I don't recall the dura using tc controls, i thought those started with td?
> I may be wrong, it's been a while since i saw one of those in the wild.
>
> Phil T.
> The Feral Engineer
>
> Check out my LinuxCNC tutorials, machine builds and other antics at
>
>
> Help support my channel efforts and coffee addiction:
>
>
> On Fri, Jul 16, 2021, 2:21 PM Ralph Stirling <
> ralph.stirl...@wallawalla.edu>
> wrote:
>
> > I forbid G20 on the Mori Duraturn in my lab for that exact reason.  It
> has
> > a Fanuc 0i-TC.  I figure 21st century engineering students should develop
> > some feel for metric measurements anyway.  Just to be safe I also require
> > G21 on our Mori NVX mill even though it uses a Mits control that handles
> it
> > better.
> >
> > -- Ralph
> >
> > On Jul 16, 2021 9:11 AM, Todd Zuercher  wrote:
> > CAUTION: This email originated from outside the Walla Walla University
> > email system.
> >
> >
> > I need to voice some frustration.  So pardon the OT post
> >
> > Fanuc is making me pull my hair out.  You'd think a cnc control built
> > within the last 20 years could handle switching between G20 and G21
> modes!
> > It's a flippin command line code that can be issued in a file for
> goodness
> > sakes!
> >
> > We bought a used machine that was being used in G21 mode.  And I've been
> > banging my head on this thing for a week.  Can't figure out why all of
> the
> > work coordinates are so screwed up, reset them and then they are messed
> up
> > again, G91G28 commands won't work and keep over traveling (but G90G53
> does)
> > and the home positions keep moving around.  Turns out its all because a
> > stupid Fanuc 180iM control built in 2003 can't handle switching between
> G21
> > and G20 modes without 3 power cycles, a couple of parameter changes and
> > completely resetting all the work coordinate systems settings.  FOR
> > REAL!!  Even Mach3 can do this right! If this is the case why
> > even have G20/G21 available as a G-code! It should only be a parameter
> > setting that can't be changed from a file.  This is even more annoying
> than
> > G92 or jogging a paused program, at least a power cycle can fix those
> screw
> > ups.
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.<
> >
> > >
> > 630 Henry Street
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
> >
> >
> > ___

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Re: [Emc-users] OT Fanuc!

[Ralph Stirling]

This Dura is a 2007 model.  I haven't tried G20 since
we first got it going, so don't recall exactly what the
issues were, but remember being very startled when
all the offsets were suddenly wrong when G20 was called.
Solution was instant and total metrification for cnc
machining in my lab :-).  Since few of my students have 
any significant prior experience machining, they don't
generally grumble about giving up "thou's".

The other Fanuc quirk that catches them is forgetting
decimal points on whole numbers.  X10 is 10microns
not 10mm, while X10.0 is 10mm.  It's turned a few
parts into big spiral chips on the finishing pass.

-- Ralph

From: Feral Engineer [theferalengin...@gmail.com]
Sent: Friday, July 16, 2021 11:55 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] OT Fanuc!

CAUTION: This email originated from outside the Walla Walla University email 
system.


On the dura, is the issue that it just moves the decimal instead of
converting the values? That's just a parameter change.

I don't recall the dura using tc controls, i thought those started with td?
I may be wrong, it's been a while since i saw one of those in the wild.

Phil T.
The Feral Engineer

Check out my LinuxCNC tutorials, machine builds and other antics at
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.youtube.com%2Fc%2Ftheferalengineerdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cc0601cb995c746d1254208d9488b64bb%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637620585800384160%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000sdata=hi3Npyz8PDJOx5pMdcjpSmFxPqukb6BewMMBEFJTGRo%3Dreserved=0

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On Fri, Jul 16, 2021, 2:21 PM Ralph Stirling 
wrote:

> I forbid G20 on the Mori Duraturn in my lab for that exact reason.  It has
> a Fanuc 0i-TC.  I figure 21st century engineering students should develop
> some feel for metric measurements anyway.  Just to be safe I also require
> G21 on our Mori NVX mill even though it uses a Mits control that handles it
> better.
>
> -- Ralph
>
> On Jul 16, 2021 9:11 AM, Todd Zuercher  wrote:
> CAUTION: This email originated from outside the Walla Walla University
> email system.
>
>
> I need to voice some frustration.  So pardon the OT post
>
> Fanuc is making me pull my hair out.  You'd think a cnc control built
> within the last 20 years could handle switching between G20 and G21 modes!
> It's a flippin command line code that can be issued in a file for goodness
> sakes!
>
> We bought a used machine that was being used in G21 mode.  And I've been
> banging my head on this thing for a week.  Can't figure out why all of the
> work coordinates are so screwed up, reset them and then they are messed up
> again, G91G28 commands won't work and keep over traveling (but G90G53 does)
> and the home positions keep moving around.  Turns out its all because a
> stupid Fanuc 180iM control built in 2003 can't handle switching between G21
> and G20 modes without 3 power cycles, a couple of parameter changes and
> completely resetting all the work coordinate systems settings.  FOR
> REAL!!  Even Mach3 can do this right! If this is the case why
> even have G20/G21 available as a G-code! It should only be a parameter
> setting that can't be changed from a file.  This is even more annoying than
> G92 or jogging a paused program, at least a power cycle can fix those screw
> ups.
>
> Todd Zuercher
> P. Graham Dunn Inc.<
> https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pgrahamdunn.com%2Findex.phpdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7Cc0601cb995c746d1254208d9488b64bb%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637620585800394159%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000sdata=VDdiVni%2FePJD71WvCSxNoqQ1CUzEUwC%2FjrcTIU0syA8%3Dreserved=0
> >
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
>
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>
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Re: [Emc-users] OT Fanuc!

[Ralph Stirling]

I forbid G20 on the Mori Duraturn in my lab for that exact reason.  It has a 
Fanuc 0i-TC.  I figure 21st century engineering students should develop some 
feel for metric measurements anyway.  Just to be safe I also require G21 on our 
Mori NVX mill even though it uses a Mits control that handles it better.

-- Ralph

On Jul 16, 2021 9:11 AM, Todd Zuercher  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


I need to voice some frustration.  So pardon the OT post

Fanuc is making me pull my hair out.  You'd think a cnc control built within 
the last 20 years could handle switching between G20 and G21 modes!  It's a 
flippin command line code that can be issued in a file for goodness sakes!

We bought a used machine that was being used in G21 mode.  And I've been 
banging my head on this thing for a week.  Can't figure out why all of the work 
coordinates are so screwed up, reset them and then they are messed up again, 
G91G28 commands won't work and keep over traveling (but G90G53 does) and the 
home positions keep moving around.  Turns out its all because a stupid Fanuc 
180iM control built in 2003 can't handle switching between G21 and G20 modes 
without 3 power cycles, a couple of parameter changes and completely resetting 
all the work coordinate systems settings.  FOR REAL!!  Even Mach3 
can do this right! If this is the case why even have G20/G21 available as a 
G-code! It should only be a parameter setting that can't be changed from a 
file.  This is even more annoying than G92 or jogging a paused program, at 
least a power cycle can fix those screw ups.

Todd Zuercher
P. Graham Dunn 
Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031


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Re: [Emc-users] off topic: cura profile for BIQU BX 3d printer

[Ralph Stirling]

Did you get any of the options for that SV01?  I really appreciate your reviews.

-- Ralph

On Jul 9, 2021 11:14 AM, Bruce Layne  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On 7/9/21 9:05 AM, Gene Heskett wrote:
> I also priced the pro version of cura, but $750 for a years seat at that
> table is a bit steep.
>
> I am not a happy camper this morning.

SLICERS:

A month ago, I decided that the Simplify3D slicing software that I
bought with lifetime free upgrades, that seemed to become free minor
upgrades with additional fees for the upcoming major release upgrade,
which now looks more like abandonware, has fallen behind the curve and
it's time to replace it with an open source slicer. Simplify3D was the
only commercial software on my computer.  I evaluated several slicers
and chose PrusaSlicer.  Here was my ordered preferences (your mileage
may vary):

PrusaSlicer
IdeaMaker
Cura
Simplify3D

Cura and Simplify3D were approximately a tie.  I didn't like Cura's
phone-home-to-Ultimaker operation, but Simplify3D phones home too. They
both have user interfaces that don't always work the way I'd like and
are counter intuitive or even a bit buggy as Gene described in Cura's
add-a-new-printer feature.  Cura eased out Simplify3D because it's open
source.

IdeaMaker looks and works a lot like PrusaSlicer.

PrusaSlicer manages to have a lot of features but still be fairly easy
to use.  Everything is arranged logically, so even though there are long
pages of options, I can scan and find what I want.  I found it easier to
enableExpert mode.  Even though there were more options to confuse me,
at least I wasn't looking for a hidden option.  The popup help for each
item helps.  Simplify3D has a fairly logical layout too, but some things
aren't where I'd expect them to be, or aren't implemented as I'd
expect.  As an added bonus, PrusaSlicer is now slicing files for optical
MSLA resin printers.  It may only be the Prusa resin printer now.  I'm
still using Chitubox to slice my MSLA files, but hopefully soon I can
use PrusaSlicer for all of my 3D printers.  Chitubox is free, but I
don't think it's open source. It phones home, and there's no telling
what it's reporting.  I should trap some packets and try to see for
myself.   :-)



3D PRINTERS:

I also recently stopped trying to support my QIDI Tech FDM printers.  I
paid $3000 for five of them three years ago, plus spending a lot of time
and money upgrading them.  I bought them because they had dual direct
drive extruders, dual linear rods for all three axes of motion, were
enclosed so they could better print large ABS objects without
differential cooling cracks, etc.  They were abandoned by the
manufacturer, and the proprietary parts became impossible to obtain.  I
had bought common repair parts, but other items were breaking.  I was
robbing one printer to keep another going.  QIDI went so far as to use
open source stepper driver PCBs but solder the header pins on the back
side to reverse the pinout to make them proprietary so I was forced to
buy the repair parts from them if I didn't want to unsolder the pins and
solder them on backwards.  That's a customer hostile attitude.
Manufacturers should make reliable products that are cheap and easy to
maintain but QIDI deliberately made that 3D printer difficult and
expensive to maintain.

I bought a very inexpensive Sovol SV01.  It has a much larger glass
print bed (textured one side and smooth on the other).  It only has a
single extruder, but unlike the QIDI extruders, this Titan clone is jam
proof and it feeds flexible filament like a dream.  The print quality is
much better than the QIDI, which was best in class three years ago.  The
open architecture makes maintenance and repairs easy and the generic
Ender compatible parts are cheap and readily available.  3D printers
have come a long way in the last three years.  Now is a great time to
get on board with one of the inexpensive and very capable new 3D
printers.  I recommend keeping it simple and inexpensive.

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Re: [Emc-users] four axis foam cutter 2.8 config

[Ralph Stirling]

It'll be a few days, but I'll send you the original 2.7 hal file and the 
converted file, along with some notes.

Thanks!
-- Ralph

On Jul 2, 2021 5:37 PM, andy pugh  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Thu, 1 Jul 2021 at 01:38, Ralph Stirling
 wrote:
> The auto conversion doesn't seem to
> be quite sufficient for foam cutter configurations.

I wrote the conversion script, so I guess this is my fault.

If you can send me your HAL file I can try to figure out where I messed up.

I think that this is probably purely a HAL-level problem.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] four axis foam cutter 2.8 config

[Ralph Stirling]

Some developer went to the trouble to add the very nice
FOAM mode to axis, which looks great.  There just seems
to be some problem with kinematics that won't drive the
second pair of joints.  I've tried changing to joints 6 and 7
instead of 2 and 3 for the U and V axes, but that didn't
work.  There is either missing information in the docs for
making this work, or a bug, not sure which yet.  I'll keep
reading source code and experimenting.

-- Ralph

From: Todd Zuercher [to...@pgrahamdunn.com]
Sent: Thursday, July 1, 2021 2:08 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] four axis foam cutter 2.8 config

CAUTION: This email originated from outside the Walla Walla University email 
system.


I don't think there are a whole lot of foam cutters out there period.  But with 
my very limited knowledge of the subject, I would have thought the JA version 
would be better suited for it.  It is possible that some of the workarounds 
that had to be done to make the wire cutter work  with the earlier versions are 
no longer needed and causing problems in your new config.  But I really have no 
idea, what the problem(s) could be.

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Ralph Stirling 
Sent: Thursday, July 01, 2021 3:25 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] four axis foam cutter 2.8 config

[EXTERNAL EMAIL] Be sure links are safe.

I'm getting the impression that I'm the first one to actually try post-2.7 
linuxcnc on 4-axis foam cutter hardware.  I've set up 2.9-pre0 from git so I 
can start poking in the source code.  2.9-pre0 behaves the same way.  I have 
verified that axis.x.pos-cmd and joint.0.pos-cmd both change as expected, but 
axis.y.pos-cmd changes while joint.2.pos-cmd does not.  So something is broken 
in joint-axis code for the XY;UV geometry.

-- Ralph

From: Ralph Stirling
Sent: Wednesday, June 30, 2021 5:20 PM
To: emc-users@lists.sourceforge.net
Subject: four axis foam cutter 2.8 config

I upgraded our 4-axis hotwire foam cutter to 2.8 recently, and have not been 
able to get it running again yet.  The auto conversion doesn't seem to be quite 
sufficient for foam cutter configurations.

I now have homing on all four axes working (XY;UV), but once homing is finished 
I can't jog U or V.  The backplot shows motion, but the axes don't move.
X and Y jog properly.  The U and V (and joint 2 and
3) sections are copied directly from X/0 and Y/1 with only the axis and joint 
designation changing.

Does anybody have a functioning 2.8 foam cutter configuration I could look at?

Thanks,
-- Ralph


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Re: [Emc-users] four axis foam cutter 2.8 config

[Ralph Stirling]

I'm getting the impression that I'm the first one to
actually try post-2.7 linuxcnc on 4-axis foam
cutter hardware.  I've set up 2.9-pre0 from git so
I can start poking in the source code.  2.9-pre0
behaves the same way.  I have verified that axis.x.pos-cmd
and joint.0.pos-cmd both change as expected, but
axis.y.pos-cmd changes while joint.2.pos-cmd does
not.  So something is broken in joint-axis code for
the XY;UV geometry.

-- Ralph

From: Ralph Stirling
Sent: Wednesday, June 30, 2021 5:20 PM
To: emc-users@lists.sourceforge.net
Subject: four axis foam cutter 2.8 config

I upgraded our 4-axis hotwire foam cutter to 2.8
recently, and have not been able to get it running
again yet.  The auto conversion doesn't seem to
be quite sufficient for foam cutter configurations.

I now have homing on all four axes working (XY;UV),
but once homing is finished I can't jog U or V.  The
backplot shows motion, but the axes don't move.
X and Y jog properly.  The U and V (and joint 2 and
3) sections are copied directly from X/0 and Y/1
with only the axis and joint designation changing.

Does anybody have a functioning 2.8 foam cutter
configuration I could look at?

Thanks,
-- Ralph


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[Emc-users] four axis foam cutter 2.8 config

[Ralph Stirling]

I upgraded our 4-axis hotwire foam cutter to 2.8
recently, and have not been able to get it running
again yet.  The auto conversion doesn't seem to
be quite sufficient for foam cutter configurations.

I now have homing on all four axes working (XY;UV),
but once homing is finished I can't jog U or V.  The
backplot shows motion, but the axes don't move.
X and Y jog properly.  The U and V (and joint 2 and
3) sections are copied directly from X/0 and Y/1
with only the axis and joint designation changing.

Does anybody have a functioning 2.8 foam cutter
configuration I could look at?

Thanks,
-- Ralph

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[Emc-users] high speed parallel bus on Raspberry Pi

[Ralph Stirling]

I read a very interesting article on Hackaday this
morning about the "Secondary Memory Interface"
on the Pi.  This is a little-known (poorly documented)
alternative pin set on the GPIO header that enables
a bus-type i/o with up to 18 data bits, 6 address lines,
read and write, and DMA request, all with programmable
sample and hold times with nsec resolution.  This site
has lots of info and examples on using it:
https://iosoft.blog/2020/07/16/raspberry-pi-smi/

This looks to me like it could be readily used to make
a parallel interface to Mesa cards like the 7i90 and
7i43 for very low latency.

-- Ralph

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Re: [Emc-users] all the MESA cards talk made me think

[Ralph Stirling]

A 7i92 could run twelve steppers full speed.  You load the logic configuration 
you want ("bitfile") for your application.  It could have the same pinout as 
your parallel port to plug right into your existing breakout, but run your 
steppers much smoother and faster.

-- Ralph

On Jun 13, 2021 6:13 PM, R C  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


I just looked up what a PMDX132 is,  part of my problem is that the
parallel PCI card I used appears to be broken, and of course they are
harder to get.  So I wouldn't mind switching to an ethernet based
controller in the PC side (Dell T5500/T7500).

I have seen the 7i92  mentioned, and others,  can they do multiple stepper 
motors?  (right now I am using a parallel BOB,  that connects to  steopper 
drivers (ala DM542), which drive the actual steppers.)

thanks,

Ron

On 6/13/21 7:03 PM, Gerrit Visser wrote:
> I choose a 7i92 to connect my PC with a PMDX132 to run PathPilot (which has 
> LinuxCNC inside). Depending on your BOB it might be plug-play with pre-build 
> .bit files to configure the Mesa card.
> My reason for going with ethernet version was to reduce electrical grounding 
> issues. Had too many of those in the past with direct connected stuff. It 
> also expands the choice of PC to run LinuxCNC on, doesn't need a pci or pcie 
> slot this way.
>
> Gerrit
>
> -Original Message-
> From: R C 
> Sent: June 13, 2021 8:43 PM
> To: linuxcnc-users-list 
> Subject: [Emc-users] all the MESA cards talk made me think
>
> Hello,
>
>
> I have a 'desktop' mill and lathe (both Sherline),  and I am using a parallel 
> BOB and  printer ports to run  them.  Of course one of them just  gave up 
> (PCI printer card),  I do have a spare but they are harder to come by, 
> besides, the setup is not really ideal?
>
>
> What would be the best way to replace the BOB-LPT stuff?  (these things are 
> desktop CNC machines, I am playing/learning for fun, I am not trying to 
> reliably machine F22 raptor jet engine parts, I am mostly turning stock into 
> scrap).
>
>
> I see some cards that are in the $50 etc range,  and there are the ones that 
> use  ether/cat5 connections (are 'regular' ethernet cards used with
> those?)
>
>
> I am looking at a lathe that has 2 steppers, and it has a quadrature encoder, 
>  the mill has 3 steppers, and planning on adding a quadrature encoder).
>
>
> thanks,
>
>
> Ron
>
>
>
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Re: [Emc-users] Question about Raspberry Pi 4 reliability

[Ralph Stirling]

Good point.  The OpenBuilds motion controller is another $200.
That pendant Rafael linked could probably be easily interfaced
to Linuxcnc instead of the OpenBuilds motion controller if one
wanted.

The OpenBuilds motion controller  is in a nice little box with
pluggable screw terminals on the side.  I would like to see a
Linuxcnc motion controller package that is more like a typical
PLC package, with pluggable 24v compatible I/O and everything
boxed up and powered.  Might have to design it myself and see
who else is interested in it.

https://openbuildspartstore.com/blackbox-motion-control-system/

-- Ralph

From: Dr. Andreas O. Lindner [a.lind...@lindner-tac.at]
Sent: Sunday, June 13, 2021 10:05 AM
To: ra...@linwin.com; Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Question about Raspberry Pi 4 reliability

CAUTION: This email originated from outside the Walla Walla University email 
system.


Sorry to say, but here you missed something. A motion-controller is needed in 
addition. They mention something like grbl 1.1, ….

LCNC is all that together and can do a lot more. This seams to be some fancy 
pendent for grbl.

just my 2 cts.

Andreas O. Lindner

Lindner TAC


> Am 13.06.2021 um 18:24 schrieb Rafael Skodlar :
>
> On 6/13/21 1:49 AM, John Dammeyer wrote:
>>> From: Andy Pugh [mailto:bodge...@gmail.com]
 On 13 Jun 2021, at 00:28, Leonardo Marsaglia  wrote:

  I do have a Rpi3
>>> ...
 I don't know if that's a good candidate to test LCNC.
>>>
>>> I wouldn�t expect the 3B to work with Mesa Ethernet as the pre-4 Pis have 
>>> the Ethernet in the USB bus.
>> I've also read that the Pi4 8GB is not ideal for LinuxCNC.  Apparently it 
>> has issues with that much memory on the Pi.  It works best with 4GB 
>> apparently.
>> John
>
> Huh? That makes no sense. If nothing else, you can use it for fake swap if 
> nothing else.
>
> RPi is NOT good for any industrial use. This thing is for kids to learn Linux 
> and open source programming techniques. RaspberryPi PCB design is just bad 
> for industrial use: holes for mounting, using glue for CPU heatsink, 
> connectors positions and their orientation, sandwich style header connector 
> for DIO, silicon waste (for sound and video IO), etc.
>
> To execute G-code using a large footprint computer makes no sense anymore. 
> This open source based solution is gaining popularity for simple CNC:
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fopenbuildspartstore.com%2Finterface%2Fdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C7ce4fb1e23484f391e4308d92e8fd5a7%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637592017581330281%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=4Rc36AB7NWMvZcMu8igGs6%2BfttO%2FFGyesYO3OI9ZXFM%3Dreserved=0
>   and other related HW.
>
> Just the fact that Openbuilds is not using LinuxCNC is saying something. Dead 
> end: no innovations, limitation in electronics/hardware selection.
>
>
> --
> Rafael Skodlar
>
>
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Re: [Emc-users] Question about Raspberry Pi 4 reliability

[Ralph Stirling]

Don't want to fuel any flame wars, but this kind of solution is probably fine 
for generic desktop cnc routers with steppers. Grbl even has jerk limited 
trajectories.  As soon as you get out of that stock 3 or 4 axis space and want 
to have tool changers, servos, non-cartesian machines, lathes, custom logic and 
the like, Linuxcnc really shines.  For the lower end machines this package is 
aimed at, a Rpi 4B with Mesa 7i90 and Linuxcnc 2.8 works great and is price 
competitive.

-- Ralph

On Jun 13, 2021 9:51 AM, Rafael Skodlar  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On 6/13/21 1:49 AM, John Dammeyer wrote:
>> From: Andy Pugh [mailto:bodge...@gmail.com]
>>> On 13 Jun 2021, at 00:28, Leonardo Marsaglia  wrote:
>>>
>>>   I do have a Rpi3
>> ...
>>> I don't know if that's a good candidate to test LCNC.
>>
>> I wouldn�t expect the 3B to work with Mesa Ethernet as the pre-4 Pis have 
>> the Ethernet in the USB bus.
>
> I've also read that the Pi4 8GB is not ideal for LinuxCNC.  Apparently it has 
> issues with that much memory on the Pi.  It works best with 4GB apparently.
>
> John

Huh? That makes no sense. If nothing else, you can use it for fake swap
if nothing else.

RPi is NOT good for any industrial use. This thing is for kids to learn
Linux and open source programming techniques. RaspberryPi PCB design is
just bad for industrial use: holes for mounting, using glue for CPU
heatsink, connectors positions and their orientation, sandwich style
header connector for DIO, silicon waste (for sound and video IO), etc.

To execute G-code using a large footprint computer makes no sense
anymore. This open source based solution is gaining popularity for
simple CNC:
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fopenbuildspartstore.com%2Finterface%2Fdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C9377f0f2a33846d8a41108d92e8b7bf1%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637591998889297483%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000sdata=jqHDAlBt4VCbphwggl1aVHGR%2F5thbXWVtXbdSs3AF%2F0%3Dreserved=0
  and other related HW.

Just the fact that Openbuilds is not using LinuxCNC is saying something.
Dead end: no innovations, limitation in electronics/hardware selection.


--
Rafael Skodlar


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Re: [Emc-users] Question about Raspberry Pi 4 reliability

[Ralph Stirling]

It does take a bit more fiddling to get everything going on the Rpi 4B, but it 
seems to run pretty nicely once done.  I don't have experience using it with a 
7i76e, as most of us use it with the $45 7i90.  If you don't need hardwired 
ethernet for communication with the 4B, then you can certainly use it for any 
Mesa ethernet card like the 7i92 or the 7i76e (if I'm remembering what a 7i76e 
is).

-- Ralph

On Jun 12, 2021 4:25 PM, Leonardo Marsaglia  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Hello guys,

As  some of you know, I'm finishing a CNC router and I'm about to purchase
all the control hardware. I know Gene, John, and several people here are
running LCNC on the PI with success but I would like to know how much of a
pain in the ass is to get it running well with a 7i76E for controlling the
router.

I'm trying to decide wheter I purchase Rpi 4b or I use a normal PC as I've
been doing with all the other machines. I really like the idea of using
something as portable and small as the Rpi but I don't want to purchase one
just to test right now... I do have a Rpi3 with Octoprint on the ender but
I don't know if that's a good candidate to test LCNC.

What do you guys think?

Thanks as always and I hope you're all doing well :)

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Re: [Emc-users] Pi4 issues with MESA 7i92H

[Ralph Stirling]

I don't think this is his problem, since his rpi Linuxcnc talks to the 7i92 
just fine. Only mesaflash is having trouble.

Is there any difference between a 7i92 and a 7i92h?  I have a straight 7i92 
with one 2x13 and one db25.
Have you tried explicitly specifying --addr 192 168.1.121?

-- Ralph

On Jun 11, 2021 4:05 PM, Gene Heskett  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Friday 11 June 2021 15:14:07 John Dammeyer wrote:

> Gene.
> No difference with WiFi on or off.  I thought it might have mattered
> since the Beagle and the PC don't have additional Ethernet. John
>
Turning off the radio didn't help on my pi3 or pi4, avahi still pulled a
default address in the 169 block out of someplace.

Thats why I said you have to render it non-executable.

> > -Original Message-
> > From: Gene Heskett [mailto:ghesk...@shentel.net]
> > Sent: June-11-21 11:02 AM
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] Pi4 issues with MESA 7i92H
> >
> > On Friday 11 June 2021 12:05:38 John Dammeyer wrote:
> > > Sam,
> > > Here's the ifconfig output generated from putty running on my
> > > WIN-7 workstation via remote desktop from my WIN-10 ZBook.
> > > Ethernet cable from Pi4 to 7i92 is 2' long.
> > >
> > > And with or without LinuxCNC running this is what I get:
> > > pi@linuxcnc:~ $ cd mesaflash
> > > pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92
> > > --readhmid lbp16_access.send_packet: Operation not permitted
> > > Aborted
> > >
> > > John
> > >
> > > pi@linuxcnc:~ $ ifconfig
> > > eth0: flags=4163  mtu 1500
> > > inet 192.168.1.1  netmask 255.255.255.0  broadcast
> > > 192.168.1.255 ether dc:a6:32:1e:30:f1  txqueuelen 1000  (Ethernet)
> > > RX packets 29442387  bytes 2826463726 (2.6 GiB)
> > > RX errors 0  dropped 0  overruns 0  frame 0
> > > TX packets 58886151  bytes 1122489823 (1.0 GiB)
> > > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> > >
> > > lo: flags=73  mtu 65536
> > > inet 127.0.0.1  netmask 255.0.0.0
> > > inet6 ::1  prefixlen 128  scopeid 0x10
> > > loop  txqueuelen 1000  (Local Loopback)
> > > RX packets 595  bytes 40144 (39.2 KiB)
> > > RX errors 0  dropped 0  overruns 0  frame 0
> > > TX packets 595  bytes 40144 (39.2 KiB)
> > > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> > >
> > > wlan0: flags=4163  mtu 1500
> > > inet 192.168.0.97  netmask 255.255.255.0  broadcast
> > > 192.168.0.255 inet6 fe80::9d66:1b85:f539:da50  prefixlen 64
> > > scopeid 0x20 ether dc:a6:32:1e:30:f2  txqueuelen 1000
> > > (Ethernet) RX packets 9  bytes 3535970 (3.3 MiB)
> > > RX errors 0  dropped 0  overruns 0  frame 0
> > > TX packets 3108  bytes 415864 (406.1 KiB)
> > > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> >
> > I see one possibility, Ralph.
> >
> > This doesn't show the default route. But "ip r" will. You are eth0
> > at 192.168.1.x and wlan0 at 192.168.0.x. If the default route is
> > thru wlan0, mesaflash will probably fail.
> >
> > I'm using a 7i90 over spi, so my eth0 or whatever name its using
> > this week is free for normal use, but that's just one of the reasons
> > I keep the #@%## radios turned off, once avahi gets it in its mind
> > to use the radio, ip can't or won't fix it, so you have to manually
> > nuke the avahi executable and reboot. In your case, rename it to
> > rumplestiltskin or whatever so you can restore it if I'm wrong.
> >
> > Take care and stay well.
> >
> > [...]
> >
> > Cheers, Gene Heskett
> > --
> > "There are four boxes to be used in defense of liberty:
> >  soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > If we desire respect for the law, we must first make the law
> > respectable. - Louis D. Brandeis
> > Genes Web page 
> > 
> >
> >
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Re: [Emc-users] Pi4 issues with MESA 7i92H

[Ralph Stirling]

Old version of mesaflash perhaps?

On Jun 11, 2021 10:06 AM, John Dammeyer  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


> From: Ralph Stirling [mailto:ralph.stirl...@wallawalla.edu]
>
> I have no problem using 192.168.1.1 for eth0 on pi4 with 7i92.

I don't either with LinuxCNC moving motors.  But it's the mesaflash software 
that is having an issue.  But only on a Pi.  I've downloaded the software from 
github on a PC, Beagle and Pi4.  Only on the Pi4 does it have issues.

Now I can use the PC or the Beagle to flash the appropriate pin file into the 
Pi4 but that's not really the point here.  Very puzzled.

John


>
> On Jun 11, 2021 9:30 AM, Sam Sokolik  wrote:
> CAUTION: This email originated from outside the Walla Walla University email 
> system.
>
>
> That would be something to try..  Maybe mesaflash doesn't know how to
> handle the 192.168.1.1 ip address?  Set the pie to something else like
> 192.168.1.10
>
> On Fri, Jun 11, 2021 at 11:25 AM Mark Wendt  wrote:
>
> > On Fri, Jun 11, 2021 at 12:09 PM John Dammeyer 
> > wrote:
> >
> > > Sam,
> > > Here's the ifconfig output generated from putty running on my WIN-7
> > > workstation via remote desktop from my WIN-10 ZBook.  Ethernet cable from
> > > Pi4 to 7i92 is 2' long.
> > >
> > > And with or without LinuxCNC running this is what I get:
> > > pi@linuxcnc:~ $ cd mesaflash
> > > pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --readhmid
> > > lbp16_access.send_packet: Operation not permitted
> > > Aborted
> > >
> > > John
> > >
> > > pi@linuxcnc:~ $ ifconfig
> > > eth0: flags=4163  mtu 1500
> > > inet 192.168.1.1  netmask 255.255.255.0  broadcast 192.168.1.255
> > > ether dc:a6:32:1e:30:f1  txqueuelen 1000  (Ethernet)
> > > RX packets 29442387  bytes 2826463726 (2.6 GiB)
> > > RX errors 0  dropped 0  overruns 0  frame 0
> > > TX packets 58886151  bytes 1122489823 (1.0 GiB)
> > > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> > >
> > > lo: flags=73  mtu 65536
> > > inet 127.0.0.1  netmask 255.0.0.0
> > > inet6 ::1  prefixlen 128  scopeid 0x10
> > > loop  txqueuelen 1000  (Local Loopback)
> > > RX packets 595  bytes 40144 (39.2 KiB)
> > > RX errors 0  dropped 0  overruns 0  frame 0
> > > TX packets 595  bytes 40144 (39.2 KiB)
> > > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> > >
> > > wlan0: flags=4163  mtu 1500
> > > inet 192.168.0.97  netmask 255.255.255.0  broadcast 192.168.0.255
> > > inet6 fe80::9d66:1b85:f539:da50  prefixlen 64  scopeid 0x20
> > > ether dc:a6:32:1e:30:f2  txqueuelen 1000  (Ethernet)
> > > RX packets 9  bytes 3535970 (3.3 MiB)
> > > RX errors 0  dropped 0  overruns 0  frame 0
> > > TX packets 3108  bytes 415864 (406.1 KiB)
> > > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> > >
> > > pi@linuxcnc:~ $
> > >
> >
> > Do you have any other network devices on the 192.168.1.x network?  The
> > 192.168.1.1 address is usually reserved for routers in that subnet.
> >
> > Mark
> >
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Re: [Emc-users] Pi4 issues with MESA 7i92H

[Ralph Stirling]

I have no problem using 192.168.1.1 for eth0 on pi4 with 7i92.

On Jun 11, 2021 9:30 AM, Sam Sokolik  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


That would be something to try..  Maybe mesaflash doesn't know how to
handle the 192.168.1.1 ip address?  Set the pie to something else like
192.168.1.10

On Fri, Jun 11, 2021 at 11:25 AM Mark Wendt  wrote:

> On Fri, Jun 11, 2021 at 12:09 PM John Dammeyer 
> wrote:
>
> > Sam,
> > Here's the ifconfig output generated from putty running on my WIN-7
> > workstation via remote desktop from my WIN-10 ZBook.  Ethernet cable from
> > Pi4 to 7i92 is 2' long.
> >
> > And with or without LinuxCNC running this is what I get:
> > pi@linuxcnc:~ $ cd mesaflash
> > pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --readhmid
> > lbp16_access.send_packet: Operation not permitted
> > Aborted
> >
> > John
> >
> > pi@linuxcnc:~ $ ifconfig
> > eth0: flags=4163  mtu 1500
> > inet 192.168.1.1  netmask 255.255.255.0  broadcast 192.168.1.255
> > ether dc:a6:32:1e:30:f1  txqueuelen 1000  (Ethernet)
> > RX packets 29442387  bytes 2826463726 (2.6 GiB)
> > RX errors 0  dropped 0  overruns 0  frame 0
> > TX packets 58886151  bytes 1122489823 (1.0 GiB)
> > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> >
> > lo: flags=73  mtu 65536
> > inet 127.0.0.1  netmask 255.0.0.0
> > inet6 ::1  prefixlen 128  scopeid 0x10
> > loop  txqueuelen 1000  (Local Loopback)
> > RX packets 595  bytes 40144 (39.2 KiB)
> > RX errors 0  dropped 0  overruns 0  frame 0
> > TX packets 595  bytes 40144 (39.2 KiB)
> > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> >
> > wlan0: flags=4163  mtu 1500
> > inet 192.168.0.97  netmask 255.255.255.0  broadcast 192.168.0.255
> > inet6 fe80::9d66:1b85:f539:da50  prefixlen 64  scopeid 0x20
> > ether dc:a6:32:1e:30:f2  txqueuelen 1000  (Ethernet)
> > RX packets 9  bytes 3535970 (3.3 MiB)
> > RX errors 0  dropped 0  overruns 0  frame 0
> > TX packets 3108  bytes 415864 (406.1 KiB)
> > TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> >
> > pi@linuxcnc:~ $
> >
>
> Do you have any other network devices on the 192.168.1.x network?  The
> 192.168.1.1 address is usually reserved for routers in that subnet.
>
> Mark
>
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Re: [Emc-users] Pi4 issues with MESA 7i92H

[Ralph Stirling]

Did you set a static ip for the pi in /etc/dhcpcd.conf?  It worked for me after 
I did this.

-- Ralph

On Jun 10, 2021 8:02 PM, John Dammeyer  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


Peter Wallace and I have been working on getting the Pi4 to work with the 7i92 
mesaflash program.

He asked me to do this but I get the error below.
pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --readhmid
lbp16_access.send_packet: Resource temporarily unavailable
Aborted

When I do this on the PC with the same 7i92 it dumps the Pins table.  The 7i92 
is communicating with the board.  It can ping it.  It can detect what type of 
board it is.  But the --readhmid parameter always returns this 
access.send_packet error.

Any ideas on how to solve this problem?  It appears to be some sort of network 
issue.  The Pi4 has successfully run my CNC hardware through the 7i92 so 
Ethernet works.  At least from LinuxCNC to the Pi.   Clearly not from the 
mesaflash to the pi.

To get mesaflash onto the Pi4 you have to do the following.
pi@linuxcnc:~ $ sudo git clone 
https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgithub.com%2Flinuxcnc%2Fmesaflashdata=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4f063130e6174fe6087c08d92c856741%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637589773748714746%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000sdata=yZ4IL4wTuuULCOB%2Fg9S9T3q2E1szCUPkKe5gaC2oIoc%3Dreserved=0
pi@linuxcnc:~/mesaflash $ sudo apt-get install libpci-dev
pi@linuxcnc:~/mesaflash $ sudo make

Once that's all done:
pi@linuxcnc:~/mesaflash $ ./mesaflash
Mesaflash version 3.4.0~pre1
Configuration and diagnostic tool for Mesa Electronics PCI(E)/ETH/EPP/USB/SPI 
boards
Try 'mesaflash --help' for more information
pi@linuxcnc:~/mesaflash $ sudo ./mesaflash --device 7i92 --addr 192.168.1.121
ETH device 7I92 at ip=192.168.1.121

Any suggestions are welcome.
Thanks
John Dammeyer


"ELS! Nothing else works as well for your Lathe"
Automation Artisans Inc.
www dot autoartisans dot com


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Re: [Emc-users] Multiple 7i90 cards on Rpi 4b

[Ralph Stirling]

When I read to the end of the hm2_rpspi man page, I saw that it recommended 
using spi0 and spi1, so I changed my design for that.  I'll report back in a 
few weeks after I've tried it.

-- Ralph

On Jun 10, 2021 1:41 PM, "Peter C. Wallace"  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Thu, 10 Jun 2021, Ralph Stirling wrote:

> Date: Thu, 10 Jun 2021 19:22:20 +
> From: Ralph Stirling 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Multiple 7i90 cards on Rpi 4b
>
> I'm not too worried about signal integrity issues, as
> I am using a four layer board and the traces are similar
> length for the original 2x13 connector and the second
> one.  I'm more worried about whether the Rpi 4B can
> handle double the traffic, and not sure whether it is
> better to use SPI0/CE0 and CE1, or SPI0 and SPI1/CE0.
> Also whether the multiple board functionality of hm2_rpspi
> has even been tested.
>
> I guess the board won't cost much from JLC, if I combine
> the order with another board I need.
>
> -- Ralph


You are very likely the first person to try this...
the SPI0+CE0 and CE1 seems simpler but I dont know
what hm2_rpspi has implemented.

> 
> From: Peter C. Wallace [p...@mesanet.com]
> Sent: Thursday, June 10, 2021 11:56 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Multiple 7i90 cards on Rpi 4b
>
> On Thu, 10 Jun 2021, Ralph Stirling wrote:
>
>> Date: Thu, 10 Jun 2021 14:58:24 +
>> From: Ralph Stirling 
>> Reply-To: "Enhanced Machine Controller (EMC)"
>> 
>> To: "emc-users@lists.sourceforge.net" 
>> Subject: [Emc-users] Multiple 7i90 cards on Rpi 4b
>>
>> The man page for hm2_rpspi indicates that multiple SPI
>> cards may be connected to a single pi4, using the spi_probe
>> parameter to which SPI port and chip enable line should
>> be used for each card.  Has this been found to work well?
>> I have an application that needs two 7i90hd's, and I will
>> be making a small pcb to connect the 7i90hd's and the 4b.
>> My single 7i90/4b card is working fine.
>>
>> Thanks,
>> -- Ralph
>>
>
> I have not tried it. Cabling and signal integrity might be an issue.
>
> Peter Wallace
> Mesa Electronics
>
>
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Peter Wallace
Mesa Electronics

(\__/)
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[Emc-users] Multiple 7i90 cards on Rpi 4b

[Ralph Stirling]

The man page for hm2_rpspi indicates that multiple SPI
cards may be connected to a single pi4, using the spi_probe
parameter to which SPI port and chip enable line should
be used for each card.  Has this been found to work well?
I have an application that needs two 7i90hd's, and I will
be making a small pcb to connect the 7i90hd's and the 4b.
My single 7i90/4b card is working fine.

Thanks,
-- Ralph

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Re: [Emc-users] Pi4 LinuxCNC

[Ralph Stirling]

The only 64 bit OS for Rpi is still in bera, so you would have to work hard to 
find it and install it.  I dug around last week to verify that.  The "v7l" in 
the image name and in uname -a is for 32bit.

-- Ralph

On May 4, 2021 5:37 PM, John Dammeyer  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


> From: Robert Murphy [mailto:robert.mur...@gmx.com]
>
> file /bin/bash ?
>
> On 5/5/21 9:53 am, John Dammeyer wrote:
> > How can I find out if the Pi4 running LinuxCNC is an ARM64 or 32 bit 
> > version?
> > Is there a clue with uname -a?
> >
> > John


So if it says ELF 32-bit LSB executable then I'm running the 32 bit version?

The newer version of the Pi OS with uname -a says Linux raspberrypi 5.10.17-v71

The LinuxCNC version was 4.7 I think.  Not running it at the moment.
John




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Re: [Emc-users] Analog servo system

[Ralph Stirling]

I really ought to get a 7i84 as well.  The current
control uses 24 inputs and 10 outputs, although
I could make the machine work with the 16 in
and 8 out of the 7i97 if I ditched the limit switch
inputs and relied on soft limits and the home
switches, and didn't use some of the mechanical
buttons present.

I'll go ahead and place an order for a 7i84 and
you can stick the 7i97 in as well, so I'll pay for
your shipping too.  Still a fabulous deal!

Thanks again!
-- Ralph

From: Ralph Stirling
Sent: Sunday, April 25, 2021 1:35 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Analog servo system

Can't turn down a deal like that!  I only need three analog channels.

Thank you!
-- Ralph


On Apr 25, 2021 1:22 PM, "Peter C. Wallace"  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Sun, 25 Apr 2021, Ralph Stirling wrote:

> Date: Sun, 25 Apr 2021 17:43:12 +
> From: Ralph Stirling 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "emc-users@lists.sourceforge.net" 
> Subject: [Emc-users] Analog servo system
>
> Getting back to my Realmeca C2 mill retrofit now.
> I'm giving up getting the Fagor 8050 control going,
> so plan on retrofitting with LCNC.
>
> I'd like to use ethernet to a NUC-type computer.
> I'm looking at this chain of boards, but am not
> sure about compatibility of some:
>
> Mesa 7i94 eight-port smart serial to Ethernet
>   ->  7i69   48 i/o sserial   -> 7i33 analog servo (have already)
>   ->  7i84   32i/16o sserial
>   ->  7i73   pendant sserial
>
> My main concern is if the 7i33 will work with the
> 7i69, and if latency will become an issue with
> everything running over sserial and ethernet.
>
> The 7i94 is in stock at Mesanet, and the 7i69
> and 7i73 are in stock at Mesaus.  Some other
> approaches, like the 7i97, are not in stock.
>
> Thanks,
> -- Ralph
>


I have a 7I97 with one bad analog channel for free if you want it

Peter Wallace
Mesa Electronics



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Re: [Emc-users] Analog servo system

[Ralph Stirling]

Can't turn down a deal like that!  I only need three analog channels.

Thank you!
-- Ralph


On Apr 25, 2021 1:22 PM, "Peter C. Wallace"  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


On Sun, 25 Apr 2021, Ralph Stirling wrote:

> Date: Sun, 25 Apr 2021 17:43:12 +
> From: Ralph Stirling 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "emc-users@lists.sourceforge.net" 
> Subject: [Emc-users] Analog servo system
>
> Getting back to my Realmeca C2 mill retrofit now.
> I'm giving up getting the Fagor 8050 control going,
> so plan on retrofitting with LCNC.
>
> I'd like to use ethernet to a NUC-type computer.
> I'm looking at this chain of boards, but am not
> sure about compatibility of some:
>
> Mesa 7i94 eight-port smart serial to Ethernet
>   ->  7i69   48 i/o sserial   -> 7i33 analog servo (have already)
>   ->  7i84   32i/16o sserial
>   ->  7i73   pendant sserial
>
> My main concern is if the 7i33 will work with the
> 7i69, and if latency will become an issue with
> everything running over sserial and ethernet.
>
> The 7i94 is in stock at Mesanet, and the 7i69
> and 7i73 are in stock at Mesaus.  Some other
> approaches, like the 7i97, are not in stock.
>
> Thanks,
> -- Ralph
>


I have a 7I97 with one bad analog channel for free if you want it

Peter Wallace
Mesa Electronics



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[Emc-users] Analog servo system

[Ralph Stirling]

Getting back to my Realmeca C2 mill retrofit now.
I'm giving up getting the Fagor 8050 control going,
so plan on retrofitting with LCNC.

I'd like to use ethernet to a NUC-type computer.
I'm looking at this chain of boards, but am not
sure about compatibility of some:

Mesa 7i94 eight-port smart serial to Ethernet
   ->  7i69   48 i/o sserial   -> 7i33 analog servo (have already)
   ->  7i84   32i/16o sserial
   ->  7i73   pendant sserial

My main concern is if the 7i33 will work with the
7i69, and if latency will become an issue with
everything running over sserial and ethernet.

The 7i94 is in stock at Mesanet, and the 7i69
and 7i73 are in stock at Mesaus.  Some other
approaches, like the 7i97, are not in stock.

Thanks,
-- Ralph

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Re: [Emc-users] Questions about Axis tweaks with .axisrc

[Ralph Stirling]

Thank you, Andy.  Axis.tcl was the file I needed
to find.  I was able to get the .axisrc overrides
to do what I wanted once I knew what the widgets
were named.  I don't know why my grepping in
the source tree didn't turn up that file.

-- Ralph

From: andy pugh [bodge...@gmail.com]
Sent: Thursday, April 22, 2021 1:55 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Questions about Axis tweaks with .axisrc

CAUTION: This email originated from outside the Walla Walla University email 
system.


On Thu, 22 Apr 2021 at 05:10, Ralph Stirling
 wrote:
>
> I am trying to strip down Axis a bit for
> a non-machining application of Linuxcnc.

I think that the GUI is built by the axis.tcl file. You might be
better off editing that.

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] Questions about Axis tweaks with .axisrc

[Ralph Stirling]

Oh yea, and one more:

3) How do I make my new button gray out
 before E-stop is released?

-- Ralph

From: Ralph Stirling
Sent: Wednesday, April 21, 2021 8:53 PM
To: emc-users@lists.sourceforge.net
Subject: Questions about Axis tweaks with .axisrc

I am trying to strip down Axis a bit for
a non-machining application of Linuxcnc.
I have been using the web page at:
http://linuxcnc.org/docs/html/gui/axis.html

and the axis.py source from 2.8.1 to try
to figure it out.  I managed to make the
coolant and spindle sections hide, but
have two remaining unsolved problems.

1) I want to hide the Touch Off button next
to the Home Axis button, but have been
unable to figure out what that widget is
called (is there a list of widgets somewhere?).

2) I have created a Go To Axis Home button
that successfully sends the current axis
(from the radio buttons) to the homed
position, but I can't make it line up with
the Home Axis button.  Ideally, I'd like to
replace the Touch Off button with this
Go Home button, but it isn't clear to me
how to do that either.

My .axisrc file presently looks like this:

~~~
root_window.attributes("-zoomed", True)
root_window.tk.call('grid','forget','.pane.top.tabs.fmanual.jogf.zerohome.tooltouch')
root_window.tk.call('button','.pane.top.tabs.fmanual.gohome','-text','Go To 
Axis Home','-command','gohome_clicked')
root_window.tk.call('grid','.pane.top.tabs.fmanual.gohome','-column','1','-row','4')

def gohome_clicked():
axis = vars.ja_rbutton.get()
print 'axis=',axis
if s.interp_state == linuxcnc.INTERP_IDLE:
mode = s.task_mode
if s.task_mode != linuxcnc.MODE_MDI:
c.mode(linuxcnc.MODE_MDI)
c.mdi('G53 G0 ' + axis + '0.0')

TclCommands.gohome_clicked = gohome_clicked
commands = TclCommands(root_window)
~~~

I've played around with the grid call on line 4, but without
much effect.

Anybody got some tips for me?

Thanks,
-- Ralph


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Re: [Emc-users] Worn Ball Screw?

[Ralph Stirling]

Thrust bearings at the ball screw ends perhaps?

-- Ralph

From: Todd Zuercher [to...@pgrahamdunn.com]
Sent: Monday, April 12, 2021 7:48 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Worn Ball Screw?

CAUTION: This email originated from outside the Walla Walla University email 
system.


Those here who have had to deal with a worn out ball screw.  How is this 
normally manifested.  I have a machine that is only showing backlash under 
load.  Is that normally how a worn out screw shows it's age?  I was expecting 
it to be normal loose backlash that you can measure.  But this is showing up as 
springy softness that you have to give a pretty hard shove against to move the 
dial indicator, then it snaps back to zero when you let go.  Using the usual 
jogging methods to read backlash, the machine reads zero backlash and positions 
well.  But dynamically it is awful, with loud clucking noises on direction 
changes and horribly wavy marks left on the pieces milled at those changes.  
Giving a shove on the table, I can measure more than +/-0.01" of this  
"springy" backlash, but moving the screw to a normally unused position I can 
only measure about 0.001".  This is a big fixed screw (about 2" diameter and 
more than 14ft long) with rotating nut, is there any hope of fixing it?  I'm 
considering trying to send the screw out to one of those screw refurbishing 
places.  The machine manufacturer quoted us over $18,000 to replace it.

Todd Zuercher
P. Graham Dunn 
Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031


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[Emc-users] Glade/Gtk widget

[Ralph Stirling]

Now that I have GladeVCP going again on my Rpi
(after removing QtVCP and GladeVCP and
reinstalling Gladevcp), I've got a widget question.

I'm wanting a speedcontrol widget that I can either
increment/decrement the value with the arrow
buttons, or type in a new value directly.  I suspect
this could be done with a handler, but am very
fuzzy on that process.  And actually, now that I
look over all the widgets again, I don't see any that
permit typing in a value.  I'm willing to make a new
widget if I've got some template to follow.

Thanks,
-- Ralph

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