Re: [Emc-users] Suggestions for cutting an odd little thread.

[Moses McKnight]

A quick search for #10-30 turned up several links in the US, but I assume 
shipping to the UK should not be too bad?


https://www.victornet.com/detail/TAST-10-30.html
https://www.biscotoolsupply.com/10-30-special-hand-taps


On 5/11/23 12:01, Peter Hodgson wrote:

You might like to give:

tracytools.com

a call. They are in the UK and list a 3/16 x 30 UNS on their site although 
currently no stock. They’re generally very helpful.



On 11 May 2023, at 17:16, andy pugh  wrote:

The Rivett 608 lathe has knurled screws to lock the micrometer dials.
These are quite long, going down the centre of the feedscrew and
pushing out a radial wedge.

I am making some new feedscrews and have realised that these screws
are threaded 0.190" x 30

This is probably #10-30 though 3/16 is possible. However I have never
found a screw to be _above_ nominal diameter, so think it is #10-30.

#10-30 is listed as an old ASME (pre-war) standard. But finding the
taps in the UK seems about as easy as you would expect.

So, how else to cut the thread? Maybe a very tiny thread mill?
Single-point cutting might work, but it's a rather deep thread for the
diameter. And I don't have a suitable tool (such as
https://www.ebay.com/itm/383646508366 ). Thread-milling would be an
excuse to add live tooling to the lathe, and an almost-suitable cutter
is affordable: 
https://www.shop-apt.co.uk/single-tooth-thread-mills-for-general-use-internal-60-partial-profile/internal-partial-profile-60-thread-mill-05-08mm-pitch.html

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Re: [Emc-users] OT - Thoughts on making SheetCam open source

[Moses McKnight]

SheetCAM is WELL known among LinuxCNC and Mach3/4 users - especially in plasma 
cutting.  It works quite well and has more flexibility than many other CAM 
programs of a similar nature.


I would be quite interested in helping maintain and improve it.  Time to work on 
it is the only problem, but I think that I could work on it a little here and 
there.  I suspect there are others who would be quite interested in helping and 
would have a little time as well.


On 2/23/23 11:25, Chris Albertson wrote:

The problem with SheetCam is that I had to use Google to find out what it
is.Then I found the website and it is still not clear how I would use
it to convert my CAD files into g-code or if it would work for that.   You
might want to describe the use cases and sample workflows that go from an
idea to a finished part and where SheetCam fits into that.

Yes "Dumping it on Github" is required but not even close to sufficient to
make it into a successful project.   You will need to put all the above
information in the README.MD file.  The documentation has to be open source
too.

I think the easiest projects ones to get started are software tools because
all your users are software developers and have the skills to modify your
open source project.   But a product targeted to machinists means that the
vast majority of your users are not software developers and would lack the
skills required to contribute.   You have to solve that problem.

Finally, the platform matters a lot. Is it written in something
obscure?  An open-source CAM system written in Haskell is not going to take
off.But if written in Python you have 1,000 times more potential
contributors. What is the run-time platform?   Windows users almost
never contribute to Open Source projects.  It needs to be multi-platform.

So, ...  I idea would be...

I think the best way to transition this is to change just a little at a
time, first move the code github and drop the price to zero.   Then offer
to sell technical support contracts that include pre-compiled binary
files.   If you are lucky, dropping the price will dramatically increase
"sales" and with a much larger user base, you will be as busy as you want
to be doing support.   You can control the number of hours you work by
adjusting the price of the contract.   Others will see they can make money
by consulting and will compete with you, then you can drop out  or just
work less. Getting machinists to contribute will be hard, better I
think to give them some incentive by encouraging them to compete with your
tech support business.   But this depends on a MUCH larger user base.   You
get that by dropping the price to zero and improving the technical
documentation and quite a lot of self-promotion.

About self-promotion.  It should be easier with an open source product.
You will be asked to leave many forums if you are selling something but
giving something away is different.

In short:  Do a smaller transition.  Continue to "sell" it but drop the
price to zero, offer a new service for X dollars per year and yes, do put
it all in Github  Later you stop doing the sales and consulting and
leave it on GitHub.   The point is that there is no "hard" transition.

Also you might work on showing how SheetCam works with the CAD programs
people are using.   Perhaps FreeCad is a good starting place.

On Thu, Feb 23, 2023 at 5:27 AM Les Newell 
wrote:


Hi all,

I'm intending to retire some time this year and I am trying to decide
what to do with SheetCam. One option that I'm seriously considering is
making SheetCam open source (GPL). If this is too off topic for this
list please tell me.

I really want to see SheetCam continue to be developed and improved. My
accountant thinks I'm nuts to even consider going open source but my
biggest concern with selling it is that I don't want to see it get
turned into a cash cow with very little development, pretty much the way
Mach3 ended up.

While I have contributed to a few open source projects including
LinuxCNC I have never started one. To be successful an open source
project needs a strong leader or team of leaders. I don't want to be a
leader. I don't expect to just dump it on Github and walk away but I
also don't want to end up doing just as much work as I'm doing now. My
ideal scenario would be to recruit a team of core developers then
gradually reduce my involvement. The question is, am I likely to be able
to recruit those developers?

Basically at the moment I'm looking for advice and opinions.

Les





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Re: [Emc-users] MESA 7i92H Power

[Moses McKnight]

jlcpcb.com
pcbway.com

I've used pcbway a lot and jlcpcb once now.  Pcbway is good but sometimes the 
solder mask seems a bit thin.  The jlcpcb boards I got are good and I've seen 
them recommended elsewhere so they are probably pretty consistent.  Both offer 
24 hour turn time on small boards really inexpensively.  jlcpcb was better for 
my last batch because the boards were a little longer than 100mm.  10 boards for 
$9.70, $18.xx shipping with a $8 first time rebate so I paid about $18 for 10 
boards and had them in my hands in less than a week.


Moses

On 9/13/19 12:28 PM, John Dammeyer wrote:

Where's an inexpensive place to get a couple of small 2.85" x 3.5" double sided 
PC boards made?

I've designed a small interface board that will optically isolate the 
step/dir/enable signals before they become differential RS422 for the STMBL AC 
Servo Drive.  Along with 5V for the MESA 7i92H and a couple of optically 
isolated transistors to reset the HP_UHU DC Servo drives.
The board also can be jumpered instead to provide RS422 for step/dir but Open 
Collector drive for Enable and receiving and isolating Open Collector Fault 
from the Bergerda AC Servo Drives.
So a whole bunch of features in one small DIN rail mountable board.
  
Thanks

John



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Re: [Emc-users] ConFusion 360

[Moses McKnight]

On 3/23/19 1:16 PM, Gene Heskett wrote:


...  Gotta learn geda and friends I guess.


If you're trying EDA software, I found Kicad to be far easier to learn and use 
than Eagle or Geda - and it's quite powerful these days.


Moses


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Re: [Emc-users] I wonder if this would be a good LinuxCNC candidate?

[Moses McKnight]

That's a good price.  I have tested a NUC with the N3050 cpu and it had good 
latency under PREEMPT-RT, but the processor is just a tad slow.  In my opinion 
it would be fine for linuxcnc but might not like doing other things very well 
while linuxcnc is running.  I think you will need a newer kernel and all than 
wheezy in order to support the hardware properly as well - jessie might work.


On 08/07/2018 08:22 AM, andy pugh wrote:

https://www.mini-itx.com/~EL-20-3050-32GB

(Reduced to £100, UK seller, so likely only of interest in the EU)

Dual LAN might make it a nice fit for the the 7i80 and friends.



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Re: [Emc-users] USB wifi dongle

[Moses McKnight]

I thought I sent this a couple of days ago but it only went to Andy because I 
forgot this list does not set the Reply-to to the list address (annoying it is!)


The problem with Debian and wireless is that they don't include firmware for the 
wireless chipsets by default (non-free etc), so you have to install the firmware 
package for your chipset.


Here are a couple of sites with adapters that should work with about any linux 
distro, although debian may require firmware install for some of them.  I 
haven't tried any of these myself!  I did get a panda pau05 and it seems to work 
well in ubuntu 14.04, but I did not try in Debian.


https://www.thinkpenguin.com/catalog/wireless-networking-gnulinux
https://zsecurity.org/product/mini-atheros-ar9271-2-4-ghz-usb-wifi-wireless-adapter/
https://zsecurity.org/product/atheros-ar9271-2-4-ghz-usb-wifi-wireless-adapter/

On 03/22/2018 09:37 PM, andy pugh wrote:

On 23 March 2018 at 01:29, jeremy youngs  wrote:

Something like this ?


Yes, very similar.

But I would suggest waiting in the hope that somone knows of a Wifi
dongle that works :-)



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Re: [Emc-users] GladeVCP Hal_LightButton widget

[Moses McKnight]

Hi Ralph, I wrote the widget but have mostly used it from glade.  I'll try and 
dig up some examples when I get a chance!


Moses

On 02/06/2018 02:34 PM, Ralph Stirling wrote:

Anybody have an example of using the LightButton widget?
I can't find any documentation on it, and haven't been able
to get it to work in Axis.

Thanks,
-- Ralph
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Re: [Emc-users] Avoiding probe crash

[Moses McKnight]

I perhaps have a little different perspective since we use probe moves with 
plasma systems where the "probe" is the torch tip and is either ohmic sensing or 
a switch mechanically activated when the torch is pressed against the metal.


2.7 does not ignore all spurious trips, because it will abort if probe is 
tripped during a jog or homing.  I am using a patch I made which adds two INI 
settings to disable each of those behaviors, although we pretty much only ever 
disable probe aborting during homing for our setups.


I do think it should be "abort" instead of e-stop on spurious trips.

I like the idea of a HAL pin to disable the behavior because I think that might 
make it easier to do more complex disabling of probe aborts - such as ignoring 
probe trips while homing, or restoring the 2.7 behavior where spurious probe 
trips are ignored except while homing or jogging.


Moses

On 12/05/2017 03:28 PM, Sebastian Kuzminsky wrote:

Les Newell's use case (where the "probe" is a tool length sensor permanently 
mounted to the table) shows the problem with my "what's in the spindle"-centric 
proposal.


I like part of Christian's proposal, where the user can configure HAL to 
enable/disable the "E-stop on unexpected probe trip" behavior.


I'm also sympathetic to Jon Elson's opinion that a spurious probe trip is 
essentially a misconfigured/glitchy machine, and it's the user's job to fix it 
somehow (possibly using some HAL logic to control the signal that Christian 
proposed).


So I propose this:

* Define a "probe trip" to be a positive edge on the motion.probe-input pin.

* A probe trip during G38 (ie, when motion.motion-type == 5) is handled just 
like now.


* A probe trip at any other time causes E-stop.

* A user with a glitchy probe can restore 2.7's behavior ("ignore probe trips 
when not probing") by setting up HAL logic like this:


     motion.probe-input = probe-input-pin AND (motion.motion-type == 5)


In brief, this is a proposal to change the behavior from 2.7's "ignore spurious 
trips" to a new "E-stop on spurious trips", and a suggestion of a simple 
user-level configuration work-around to restore the old behavior by masking the 
probe input.  Other HAL circuitry is of course possible too, depending on what 
the user wants.





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[Emc-users] The "joints-axes" project has been merged into master - REQUIRES updates to configs!

[Moses McKnight]

Hi all,

The joints-axes branch has now been merged into master!  Joints/axes was a 
project to separate "joints" from "axes" in order to better support machines 
where a single motor does not directly drive motion along an axis, such as 
gantry machines, robot arms, hexapods, and similar.

Anyone running the development branch of LinuxCNC will need to update your 
configs.  Details on the changes needed are in the documentation here:

http://linuxcnc.org/docs/devel/html/getting-started/updating-linuxcnc.html

Many thanks to all who worked on this project!
In particular:
Alex Joni, Andrew Kyrychenko, Andy Pugh, Chris Radek, Dewey Garrett, Jeff 
Epler, 
Kim Kirwan, Michael Geszkiewicz, Sam Sokolik, Sebastian Kuzminsky, and Stephen 
Wille Padnos - not to leave out others who may have helped but did not directly 
commit code.

Moses

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Re: [Emc-users] Any Interest or Ideas for a Linuxcnc Fest 2016 ?

[Moses McKnight]

I'm definitely interested.  I could not make the one in TX, but I will try and 
make this one.  The time frame is fine with me as well.

On 06/14/2016 03:24 PM, Stuart Stevenson wrote:
> Gentlemen,
> I have a 12 foot conference table and another long table in a large room.
> We can easily seat 16-20 people.
> Air conditioned and plenty of power and internet.
> Any time would work but for playing in the shop and being cooler late
> September or early October is probably the best time.
> We can do it any date or I can set the date. Someone start the ball rolling.
> I am about a mile from MPM so it is close to where it was before.
>
> 3434 West Harry is the address
>
>
> On Tue, Jun 14, 2016 at 1:35 PM, Sebastian Kuzminsky 
> wrote:
>
>> On 05/02/2016 12:17 PM, Stuart Stevenson wrote:
>>> If there is no interest or opportunity somewhere else you are all welcome
>>> here.
>>> I am in a shop of my own now. It may not be as interesting.
>>> I am no longer associated with MPM in Wichita, Kansas nor EMI in
>> Eminence,
>>> Missouri.
>>>
>>> I think sometime in the next few weeks or sometime early fall would be
>> the
>>> best time to be here.
>>>
>>> If we have interest shown we can set a date and let it happen.
>>
>> Thanks for the offer.  I think it's better than the offer I made on IRC
>> for a meeting in Boulder, CO.
>>
>> Do you have something like the conference room at MPM, where we can all
>> sit comfortably around a table with power and internet?  If so I think
>> we'll gratefully accept your offer!
>>
>> Since the next few weeks came and went, we're looking at some time in
>> early fall.  September?  October?  When works for everyone?
>>
>>
>> --
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>>
>>
>> --
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Re: [Emc-users] Rewire Question?

[Moses McKnight]

This may sound simplistic, but mount a control box on the machine with and main 
disconnect and breakers in it, and just one set of larger wires out to the main 
power box.  The control box could even just be a breaker box.

On 02/05/2016 04:22 PM, Todd  Zuercher wrote:
> We have an old machine that through the years has become an ungainly ball of 
> wires. Currently with OSHA regs and all lockout tagout is a real pain as it 
> is on this machine.
>
> It is a gang router (didn't start out as one), and is connected to 9 
> different single phase 110v breakers. One for each of the six 15amp routers 
> plus 3 more for the control, and motion. (that stuff totals at most another 
> 15amps.)
>
> Any suggestions for slimming this down so it could run off one set of wires 
> with a single disconnect at the machine?
>

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Re: [Emc-users] One config for simulation and real machine

[Moses McKnight]

Take a look at haltcl - HAL files written in TCL

On 01/28/2016 04:54 AM, Marius Alksnys wrote:
> How to make one LinuxCNC config suitable in both cases: real and sim?
> I face this often trying to config, tune, program machines being at the
> field and away.
>
> One example could be alter start of lines in hal files like:
>
> # Will work only with real hardware:
> [SIM](REAL) net some-signal my-hardware.port.pin...
>
> # Will work only in sim:
> [SIM](SIM) net some-signal simulated-feature.pin...
>
> And in ini file, [SIM] section specify skipping depending on scenario:
>
> For simulation:
> [SIM]
> REAL = skip
> SIM =
>
> For real hardware:
> [SIM]
> REAL =
> SIM = skip
>
> The problems I face now that there is no such dedicated halcmd command
> to skip a line (or I can't find it). Comment symbol is not accepted too.
> And I don't know a way to give an empty line. Maybe this could be easily
> implemented?..
>
> What I tried and works:
>
> [SIM]
> REAL = show param
>
> It would be even better to be able to skip from the middle of the hal line.
> More ideas:
> use exit
> use IF or GOTO in HAL files
>
> Your thoughts?
>
>
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Re: [Emc-users] Desktops and OS's

[Moses McKnight]

To speak of Ubuntu vs. Debian is irrelevant when speaking of the user 
interface. 
  You can run Xubuntu and it will have the same user interface as the one used 
in the linuxcnc version of debian wheezy.  The differences are mostly minor in 
how they are set up.

That said, I have generally found *buntu to be easier to install and to have a 
nicer and easier to use default setup than Debian, but Linux Mint is even 
better 
than *buntu in those things.

On 11/03/2015 07:12 AM, Bruce Layne wrote:
> I last tried Debian when picking a distro when switching to Linux a very
> long time ago.  I've been using Ubuntu on my CNC tools and my desktop
> for the last few years and have converted some friends and family to
> Ubuntu... because I don't do Windows.  I tried Debian again recently
> when it was part of the installation ISO for the latest version of
> LinuxCNC.  I liked it better than Ubuntu, which seems a bit too Mac-like
> for my tastes.  I haven't used Debian on the desktop yet and haven't
> really used it much with LinuxCNC either, so I can't give it my
> endorsement, but I am very inclined to switch my desktop to Debian when
> I get a new PC.
>
> I should probably stick to the devil I know.  There are all of the
> hidden problems when switching to a new distro.  For example, printing
> US Postal System shipping labels (via PayPal, via Pitney Bowes, using
> their Java craplet) is fraught with peril.  Dragons be here!  But who
> knows?  It might work in Debian... for a week or two.
>
> At this point, I guess I'm basically adopting whatever distro LinuxCNC
> uses in the ISO for my desktop as well.  So far, from the little I've
> seen of it, I like the clean look of Debian, and it works the way my
> brain wants it to work.  Ubuntu seemed too clever for its own good
> sometimes, like the Mac, with things hidden where they are intuitive to
> everyone but me.  User interfaces are very subjective.  YMMV.
>
>
>
> On 11/03/2015 06:18 AM, John Thornton wrote:
>> My search is for one that is less annoying than any that I have tried in
>> Debian
>
>
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Re: [Emc-users] Linux Mint

[Moses McKnight]

What kind of realtime kernel do you want?  I have a couple of PREEMPT-RT 
kernels 
built, but have not worked with RTAI kernels for it.

On 11/02/2015 02:26 PM, John Thornton wrote:
> I have Linux Mint 17.2 and like the interface, are there any
> instructions on how to patch the kernel for real time? I ran uname -r
> and it reports 3.16.0-38 generic in 17.2. Cinnamon and Mate seem to be
> the best for me, I could not figure out where the turn off button was in
> XFCE lol. Finally found it and the name choice was poor.
>
> I've done a lot of things on computers but building or patching a kernel
> is not on that list so any advice is appreciated.
>
> Thanks
> JT
>
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Re: [Emc-users] Rookie question - what to get to run LinCNC easily/inexpensively

[Moses McKnight]

It may depend on several things.  I got an HP 7800 SFF and the latency looked 
pretty good, until I started using a custom usb device with it (necessary for 
my 
setup), and then I started getting realtime errors while running linuxcnc. 
Switched to a Dell 745 and have had no such problems.

Moses

On 10/12/2015 11:16 AM, Kirk Wallace wrote:
> On 10/12/2015 08:57 AM, Claude Zervas wrote:
>> Um, no, that HP 7800 SFF has *terrible* latency - it will spike up to
>> 133,000 after 20 minutes or so.
>> Based on Kirk's recommendation I bought the same one on ebay and installed
>> LinuxCNC 2.7 but the latency was really bad. I tried turning off every
>> power saving features in the bios and all the tricks listed in the LinuxCNC
>> wiki without success.
>> If someone has information about what can be done to fix the latency
>> problems on these machines I would really appreciate it! So far this
>> machine is basically an ugly door stop.
>>
>> thanks,
>> - Claude
>
> Sorry if the HP didn't work for you. Mine are still working very well.
> Peter has been using these too. You might check with Peter Wallace at
> Mesa to see how his are working.
>
>

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Re: [Emc-users] possible to have BOTH a glade side panel AND embedded tab?

[Moses McKnight]

Well, it looks to me like you need to change the name of the component to 
something other than 'gladevcp'.  I think the panel gets the name 'gladevcp', 
so 
the tab must have a different name.

Try something like this
EMBED_TAB_NAME=Cycles
EMBED_TAB_COMMAND=halcmd loadusr -Wn cycles gladevcp -c cycles -u 
lathehandler.py -x {XID} lathemacro.ui

See also section 3.6 here: 
http://www.linuxcnc.org/docs/2.7/html/gui/gladevcp.html#cha:glade-vcp

Moses

On 06/29/2015 09:26 AM, Tom Easterday wrote:
 I should add that with this config:

 GLADEVCP = EMCO120p.ui -d
 EMBED_TAB_NAME=Cycles
 EMBED_TAB_COMMAND=halcmd loadusr -Wn gladevcp gladevcp -c gladevcp -u 
 lathehandler.py -x {XID} lathemacro.ui

 I get this message when Axis comes up and while my side panel is there and 
 works, the tab is empty:

 LINUXCNC - 2.7.0~pre6
 Machine configuration directory is
 '/home/tom/linuxcnc/configs/EMCOturn120p-glade'
 Machine configuration file is 'EMCOturn120pGlade.ini'
 Starting LinuxCNC...
 .
 Found file:./EMCOturn120pGlade.hal
 Found file:./custom.hal
 spindle-vfd: device='/dev/ttyS0', baud=9600, parity='N', bits=8,
 stopbits=2, address=1, enabled=0
 INFO CLASSICLADDER-   No ladder GUI requested-Realtime runs till HAL closes.
 Toolerator3000 Firmware Version: Toolerator 3000 version 1.3 Burping Badger

 Xlib.protocol.request.QueryExtension
 Xlib.protocol.request.QueryExtension
 Waiting for component 'gladevcp' to become
 ready./home/tom/linuxcnc-dev/bin/gladevcp:185: GtkWarning: GtkSpinButton:
 setting an adjustment with non-zero page size is deprecated
   builder.add_from_file(xmlname)
 Waiting for component 'gladevcp' to become ready.

 /home/tom/linuxcnc-dev/bin/gladevcp:185: GtkWarning:
 IA__gtk_radio_button_set_group: assertion `!g_slist_find (group,
 radio_button)' failed
   builder.add_from_file(xmlname)
 HAL: ERROR: duplicate component name 'gladevcp'
 *** GLADE VCP ERROR:Asking for a HAL component using a name that
 already exists.
 /home/tom/linuxcnc-dev/bin/gladevcp:295: GtkWarning:
 gtk_widget_size_allocate(): attempt to allocate widget with width -5 and
 height 15
   gtk.main()
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Re: [Emc-users] Where does the default jog speed definition live?

[Moses McKnight]

Look for DEFAULT_LINEAR_VELOCITY in the [DISPLAY] section of your ini file.
If that does not exist, then there is also DEFAULT_VELOCITY in the [TRAJ] 
section which apparently does the same thing, but I think it has a lower 
priority

http://www.linuxcnc.org/docs/2.7/html/config/ini_config.html#_display_section

On 06/29/2015 01:21 PM, Marcus Bowman wrote:
 Sorry; I know this is an elementary question, and I have probably failed to 
 notice it when consulting the documentation (can't see the wood for the trees 
 etc).
 I want to alter my defaults so that when LinuxCNC starts up it has a jog 
 speed  which I have defined. The normal default is way too slow for me. I 
 need to set it to around 1500mm/min or thereabouts. But I can't find where 
 the variable lives. I don't see it in the set-up file.

 Marcus


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Re: [Emc-users] New Debian install does not include Gedit

[Moses McKnight]

That is interesting, because I use Gedit a *lot* - multiple instances running 
with multiple files open in each instance - and I have never had it trash a 
single file or ever even crash.

Moses

On 04/01/2015 08:33 AM, Gene Heskett wrote:
snip
 It can be used on limited resource machines, but gedit, or geany has a
 much nicer interface.  Gedit I have had trash several files however, so
 while geany doesn't have all the syntax hylighting gedit has, its
 commands are nearly identical so if used to one you are used to the
 other.  And geany hasn't yet ever trashed a file for me, gedit has
 several times, and when it happened for about the 10th time while doing
 that 400 line hal for the lathe, that was the back breaking straw for
 me.

 Nano has not ever trashed a file, but I find its command interface clumsy
 and a bit prehistoric.  If nano has a search (and replace) function,
 I've not figured out how to use it.

 My distaste for gedit is because gedit probably cost me 2 extra weeks
 getting my lathe running with a 5i25 card because of its propensity to
 copy a line, or several lines of .hal stuff, into the middle of other
 lines of .hal stuff, caused me so much grief with the pure gibberish it
 created that I was ready to shoot all the neighborhood cats.  So I went
 looking for an editor that worked, and geany was it. With geany, and
 some help from rockhopper, I huge breath of fresh air for me.

 On 4/1/2015 4:30 AM, Belli Button wrote:
 New Debian install CD does not include Gedit (even though it's the
 preferred LCNC editor)?

 Bellisimo

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Re: [Emc-users] Oscilloscope + logic analyzer (PC based)

[Moses McKnight]

It says it runs in Linux on the dangerousprototypes site.

I have a Logic 8 from https://www.saleae.com/  When I got it a few years ago 
they were $149.  It has linux software and has been a very nice and handy 
little 
tool.

That OpenBench Logic sniffer looks pretty nice though - and cheap!

Moses

On 10/07/2014 10:50 AM, Jon Elson wrote:
 On 10/07/2014 05:55 AM, bruno wrote:
 for logic analyzer, I use the Open Bench Logic sniffer.
 Extremely capable:

 * Capture 50MHz+ waveforms on 32 channels
 o 200Msps captures up to 100MHz waveforms on 16 channels
 o 100Msps captures up to 50MHz waveforms on 32 channels


 open source and very cheap: 50$

 quick spec and price here:
 http://www.seeedstudio.com/depot/Open-Workbench-Logic-Sniffer-p-612.html

 much more information:
 http://dangerousprototypes.com/docs/Open_Bench_Logic_Sniffer


 Looks QUITE interesting!  I have several big logic analyzers
 available, but it might be nice
 to have something like this to keep in the toolbox.  I see
 it mentions Java, but does the
 software run under a Linux environment?

 Thanks,

 Jon

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Re: [Emc-users] LinuxCNC Fest - Houston, LODGING?

[Moses McKnight]

I booked a room at Baymont Inn  Suites Houston Hobby Airport through Expedia 
for $42 a night.  Unfortunately I may need to cancel and stay home as my wife 
will be 8 months pregnant.  Now that I look at the reviews more carefully 
though, I'm not seeing anything positive about that motel.

Moses

On 10/03/2014 11:30 AM, John Kasunich wrote:
 I just made my reservations (plane, hotel, rental car) last night.
 I'm staying at Candlewood Suites Houston I-10 East.  It is 9
 miles and about 15 minutes from TxRx according to Google
 Maps.

 It's a roughly $100 a night place.  The down-town hotels that
 are closer are also much more expensive: $150 to $300.
 Reviews for the sub $100 places in Houston are pretty bad.
 With more local knowledge I could have probably found a
 cheaper place that is OK, but after a couple hours online I
 just made a decision.

 I'm arriving around 5pm Friday the 17th, and leaving
 early on Wed the 22nd.  Looking forward to seeing
 everybody.

 John Kasunich


 On Fri, Oct 3, 2014, at 11:58 AM, Jon Elson wrote:
 OK, where are people staying?  Not that it is critial we all
 stay the same place,
 but where are a majority of people staying?  Can the locals
 recommend a
 decent place, maybe with a breakfast included?  (If we have
 to go out
 to eat every morning, we end up eating too much...)

 I gotta book the room soon!

 Jon

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Re: [Emc-users] Feed control

[Moses McKnight]

On 06/10/2014 04:40 PM, a k wrote:
 interesting point Viesturs Lācis
 https://plus.google.com/u/1/110435321687535631572?prsrc=4about giving a
 man a fish versus teaching him, how to catch
 a fish.
 i can recommend you to use it when you next time need to see doctor or go
 to hospital.
 point - you can learn how to fix yourself - be your own doctor.
 you can save a lot medical expense. if doctor can do so you can do also.
 a lo of logic in and common sense in it.

Speaking of expense, how much are you paying the folks here?  Nothing?!? 
  I counted 116 posts in this thread, but it seems like you won't even 
do basic reading that is pointed out to you to understand the system 
better.  That is like going to the doctor, demanding a free 
consultation, and then not taking the medicine he prescribes for you! 
What was that you were saying about logic and common sense?

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Re: [Emc-users] LinuxCNC on Ubuntu Precise 12.04 with RTAI

[Moses McKnight]

I can't tell if you figured out how to change the boot order or not, but 
just in case and for anyone else with this issue, here is a link which 
will tell you several ways of doing this.

http://askubuntu.com/questions/100232/how-do-i-change-the-grub-boot-order

Probably the quickest is to edit /etc/default/grub and change the line 
that says GRUB_DEFAULT=0 to GRUB_DEFAULT=x, with x being the number of 
the kernel you want as default -1.  So if you want the 4th kernel to be 
default then x=(4-1)=3

On 01/04/2014 10:22 AM, JohnBannister wrote:
 Hi
 I did a clean install of lubuntu 12.4 had the same problem with Grub the
 rtai kernal was 4th on the grub list which was soon sorted.
 Thankyou for the  work you have done on giving us this upgrade it works
 perfectly on my home built mill.
Is it my imagination but my stepper motors seem to run smoother.
 John

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Re: [Emc-users] Perceived issues with LinuxCNC

[Moses McKnight]

Not quite wasted I don't think, because the extra power gives you more 
acceleration which is important for keeping your speed up on corners and 
smaller arcs for plamsa cutting.

On 10/16/2013 11:48 AM, Marius Liebenberg wrote:
 Yes Ricardo, mostly cost and simplicity.
 I love servos but if I quoted servos for every machine I would be very
 hungry and weight a lot less than what I do now. :)
 I have never set up a machine with steppers that is not as accurate as
 any servo. The only big downside with steppers for me is the speed does
 not compare to servos. The last plasma I built with LCNC does 20m/sec on
 the X and Y axis and about 8m/sec on the Z. The fastest that the machine
 ever cuts is 8m/sec. The rest is wasted.


 On 2013/10/16 05:20 PM, Ricardo Moscoloni wrote:
 Hi Marius, did you say that about cost reasons of steppers against servos?
 regards
 rick

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Re: [Emc-users] running a DOS cam program in linux

[Moses McKnight]

I would try DOSbox first.  I used it for a program that had to 
communicate via serial port and it worked great.  It's nice because it's 
small and you don't need a VM.

On 08/04/2013 04:45 PM, Chris Morley wrote:
 I have a cam program - SMARTCAM turning V7.5- that runs in dos.
 Currently on a very old laptop under win 95

 The floppy drive is hooped and there is no network port or USB.

 I would like to run it under linux. Is there any suggestions on what to use
 to try this?
 Should I run win95 in a VM or something like DOSbox?

 It uses a parallel port dongle for copy protection.

 Does anyone else have any smartcam products of about this era?
 Like advanced turning or milling?

 Chris M
   
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Re: [Emc-users] LinuxCNC with CandCNC hardware?

[Moses McKnight]

On 04/04/2013 02:54 AM, Gregg Eshelman wrote:
 Anyone using LinuxCNC with a CandCNC Dragon Cut system? That hardware
 looks like the perfect setup for a large plasma table, provided I can
 keep the gantry weight down. Would definitely save a lot of time
 making bits and pieces from various sources work together.

 I still want to make a few pennies scream by using free software
 instead of Mach3. ;-)

 What bugs me about it, and many other kits for plasma tables, is the
 motor for the Z axis is wy overpowered. 620 oz-in for moving
 the gantry, but for raising and lowering a torch head that only
 weighs a few pounds?

 The only other motor option they show is all motors at 300 oz-in.
 That's still using a sledgehammer to crack eggs for the Z axis.

 Now if I could come up with a way to use all that excess power,
 perhaps a second head fitting with a drill chuck and its own spindle
 motor, use the 620 oz-in grunt to push it down.

Don't be so sure it's excess power!  The biggest thing is that you need 
to be able to accelerate the Z quickly for direction changes.  The 
faster the X/Y axes move, the faster the Z has to accelerate.  In order 
to get the best cut on thinner metal (which is mainly where you need a 
THC), you have to move the gantry quite fast, and so the Z has to be 
able to keep up.  For instance, the Hypertherm manual calls for a rate 
of 350 in/min in 16 guage mild steel with a 45A shielded tip for best 
quality, and 400 in/min for production.

I have seen tables that were able to move at the speeds required for the 
material thickness, but the Z limited it so the whole thing had to be 
slowed down.

Moses

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Re: [Emc-users] For anybody considering upgrading their motherboard in the next few months.

[Moses McKnight]

I have started using XFCE since ubuntu 12.04 came out, and it find it 
quite usable.  Easiest way to get it is Xubuntu.  Linux Mint has and is 
actively developing Cinnamon and MATE that are very nice options.  I 
suspect that Gnome3 will die, and Unity may wind up adding back features 
that make it more usable for the desktop.  Some of the features they 
have are pretty nice for small screens.


On 09/17/2012 10:15 AM, Les Newell wrote:
 I am afraid I gave on on Gnome a long time ago. KDE works quite well if
 you turn off some of the more silly animation stuff such as wobbly windows.

 Les

 On 17/09/2012 15:21, Eric Keller wrote:
 I have been using both Fedora and Ubuntu, and the desktop decisions that
 they have forced on us are really annoying.  Of course, Windows has done
 the same thing.  You are definitely removed from the file system more than
 I like.  On Ubuntu 12.04, I am using the 2d desktop, which does improve the
 experience a little.

 The sad part is this will probably further divide the developer community
 by spawning a Gnome-2 clone.
 Eric



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Re: [Emc-users] Surface-Mount

[Moses McKnight]

On 01/02/2012 09:46 AM, Peter C. Wallace wrote:
 A hair dryer is close but a little too cool. A hot air gun (the type used with
 heat-shrink tubing) will work.

An inexpensive source for one of these is a paint remover heat gun.  I 
bought several at Lowes (Lumber/Building supplies) for $25 each.  The 
ones I got are made by (or labeled anyhow) Wagner.  Has a couple of 
heat/fan levels and works great for heat shrink.  I wouldn't recommend 
giving it to your wife as a hair dryer though ;)

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Re: [Emc-users] Open letter to the EMC Board of Directors

[Moses McKnight]

On 01/24/2012 12:36 PM, Jon Elson wrote:
 John Thornton wrote:
 Why on earth would you want to close down the LinuxCNC forum and shift
 to a commercial laden for profit forum? There is nothing more annoying
 that waiting for all the commercials to load and clutter up your screen
 at the zone. Do you work for or derive profit the zone?

 Oh, that's a different story.  The performance of CNCzone was never
 great, but
 tolerable.  NOW, it is EXECRABLE!  I have a 20 MB/s internet, and I
 often have
 to wait a MINUTE for the ads to load before I can see some discussion.
 Their
 server is massively overloaded, but they don't care as long as it brings
 in cash.

 Jon

Adblock Plus is your friend.  I never leave home... uh, get on the net 
without it.  I forget that ads even exist on most sites.

http://adblockplus.org/

Moses

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Re: [Emc-users] Next distribution after Ubuntu 10.04 LTS is no longer supported?

[Moses McKnight]

On 11/25/2011 01:11 PM, Eric Keller wrote:
 On Fri, Nov 25, 2011 at 7:51 AM, andy pughbodge...@gmail.com  wrote:

 On 25 November 2011 10:51, Peter Blodowp.blo...@dreki.de  wrote:
 Andy, you hit me severely there. My respect to all developers and
 programmers of EMC, but I am sure there is a large silent majority of
 EMC users who participate without writing to the list, just reading and
 enjoying.

 Indeed, my point is that those are the people who we should consider
 when choosing an OS to base the LiveCD on.

 I have been a fairly hardcore user of Linux, RTAI, realtime linux, and for
 that matter emc from back in the old source tarball days.  My preference is
 to continue using Ubuntu for the livecd unless there is a real crisis.  As
 Andy says, it's not that hard to install emc2 on another machine if you are
 moderately skilled at using Linux.  I have really gotten used to apt-get
 installs, and I hate building from source.  Even the most minimal source
 build seems to require ridiculous dependency hassles that just aren't worth
 it to me any more.  Unless you get the source package from a distribution,
 of course.
 Eric

I don't believe the goal is to make anything harder, or to go away from 
the debian packaging system (apt-get etc).  I think the problem is that 
the newest version of Gnome (v3) is more bloated and less usable than ever.

   Xubuntu is a complete Ubuntu system but it uses XFCE for the desktop 
instead of Gnome.  Lubuntu is Ubuntu with LXDE.  Both of these require a 
lot less system resources than Gnome or KDE, but are fully functional 
and nice enough looking.

   And of course Debian is what Ubuntu is based on but it tends to be 
more stable.  It has not historically had as good hardware and media 
format support out of the box as Ubuntu partly due to a more strict 
adherence to an open-source-only policy.  That may have changed a little 
now, but I don't know since I haven't used it much for a while.

Moses

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Re: [Emc-users] Next distribution after Ubuntu 10.04 LTS is no longer supported?

[Moses McKnight]

Another option to consider is not using Unity or Gnome3 but maybe LXDE 
or XFCE instead.  Both of these are quite adequate for a machine control 
and general desktop use.  I used Xubuntu on my router table because it 
took less resources, and it works just fine.

Another thing I thought of last time and it may be a good idea still, is 
to have a UP kernel and a SMP kernel and people could chose the one that 
works best for their computer.  There may be a way to have the liveCD 
install pick the right kernel, but if not at least it could be an option 
in the repository for after the install.

I'm willing to help work on the next release again btw if I can carve 
out a little time.

Moses

On 11/24/2011 12:55 PM, Karl Schmidt wrote:
 In the long run, I think it would be MUCH better to target Debian stable. 
 There is no need for most
 of the bleeding edge issues that come with Ubuntu for an application like 
 EMC.  The stable dist of
 Debian is really stable and used by many as servers.  The only things that 
 change have to do with
 security issues.

 For a 'live' edition, Debian live could be tweaked with a realtime kernel.

 Ubuntu is really Debian with some rather ugly hacks to make it easy for 
 desktop users (to play flash
 etc.)





 
 Karl Schmidt  EMail k...@xtronics.com
 Transtronics, Inc.  WEB http://xtronics.com
 3209 West 9th Street Ph (785) 841-3089
 Lawrence, KS 66049  FAX (785) 841-0434

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 There is nothing wrong with this,
 except that it ain't so.
 --Mark Twain

 

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Re: [Emc-users] unexpected realtime delay

[Moses McKnight]

On 03/23/2011 12:52 PM, Fred Kehler wrote:
 great list!
 I have had this error popping up all the time since I upgraded to the 10.04
 distribution ( seldom on the 8.04, same computer)

 and the isolcpu=1 seems to have solved it...

 does it follow then that the second cpu in this case is not being managed by
 the realtime kernel?

No, the second cpu is *only* running the realtime kernel (I think unless 
an application explictly uses it), and everything else is put on the 
first cpu.

 I am currently running my emc on the second core 'taskset 2 emc ***.ini',
 and it seems impervious to the dreaded error message, regardless as to what
 else I run on the machine...
 but am I safe in running this way?  am I still getting realtime performance
 on the core that has been isolated on bootup?

 thank you to all the contributors!

You should be getting better realtime performance on that core now, 
since nothing else should be using it.  The realtime stuff only uses one 
core anyhow (someone correct me if I'm wrong), but with isolcpu it gets 
the core to itself.

Moses

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Re: [Emc-users] Guidance on usb comp

[Moses McKnight]

On 02/28/2011 07:37 AM, Mark Wendt wrote:
 On 02/28/2011 08:19 AM, Dave wrote:
 Siemens DriveCliq works the same way.   Everything is point to point.
 No external hubs or switches.
 I think the controller I was using recently had 6 or 8 Ethernet jacks.
 The drive module had 3, one for the connection to the controller and two
 for encoder connections.
 I think the line module (Ac to DC smart power supply) had 3 Ethernet
 jacks. Hooking everything up was very quick.

 Dave

 Looking again at the Sercos3 implementation, each host requires at
 least a two-port network interace.  That's how they implement either the
 Line, Ring or other network topology.  Each host has to process
 the data and then pass it on to the next host in a host 2+n topology.

 The Ring topology looks to be the most efficient, since two channels
 are being used to move the data around the circuit, and the second
 channel offers a bit of redundancy of the primary channel goes down.

 For environments that have multiple machines, this could be an issue
 with multiple, long network cables going from the master controller to
 the slave boxes.  With that in mind though, it's kind of hard to imagine
 multiple instances of EMC2 running on one controller PC controlling
 different machines.  For a single control PC sending data to a single
 control box, this shouldn't really be an issue.

 Interesting also how the protocol utilizes multiple length packets (or
 as they call them, Telegrams), anywhere from 84 bytes to 1538 bytes in
 length.

 Mark

Sounds like standard ethernet frames.  I would imagine they would use 
standard frames because ethernet hardware is expecting that.

http://en.wikipedia.org/wiki/Ethernet_frame

Moses

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Re: [Emc-users] diesel motor control

[Moses McKnight]

You got my attention with this!  I'm a diesel likin' man myself - I have
a Mercedes diesel car and an older Ford diesel pickup and a couple of
diesel tractors.  I've often thought of doing something like you're
talking about.  I'm currently using and programming PIC microcontrollers
at work, and I'd agree with Javid that a microcontroller might be a
better fit for the job.  Seems like the hardware requirements with EMC
would be kind of an overkill?

Anyhow, I'd like to hear more about your project as it comes along.  It
might inspire me to actually do a conversion like that on a diesel motor
or two I have laying around.

Moses

Stuart Stevenson wrote:
 Gentlemen,
 This doesn't have anything to do with machine tools. I am starting
 another project. I have retired my 1984 Mercury Lynx diesel. The body
 rusted out and the car is not drivable. I bought a 1991 Mazda 323.
 Alas, this is a gas motor car. I like diesel. I want to put the Mazda
 diesel out of the Lynx into the 323. It will bolt up to the bell
 housing. But, prior to installing it into the 323 I want to modify the
 diesel motor. I want to install common rail injection. This will
 require electronic control of the injectors and injector timing. This
 is where EMC comes in. I want to have an embedded EMC control that
 boots in 3 seconds or less and will control the injectors. I think EMC
 should be able to do this easily and control other functions as well.
 My goal is to have this modified and installed by next summer.
 Stuart
 
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Re: [Emc-users] Gene Heskett - Surface probe In User digest DTD Apr 24 2007

[Moses McKnight]

 But, just to put that in perspective for both of us, I was out to see Doc 
 Blake 2 weeks ago as I pick up scraps I can use from his shop floor from time 
 to time.  It was about 7pm and he hadn't quit for the day yet, so I asked him 
 when he was going to retire as I know he has a few years on me, but give him 
 a chair at a pickin session and he can still start a fire on the fretboard of 
 a banjo or mandolin doing real justice to some bluegrass at least as good as 
 you'll hear on Mountain Stage, the radio program on NPR.  He could sit in 
 with Ricky Skaggs and be right at home anytime.  Anyway he said he was too 
 young to retire, he was only 78.  And he said it with a straight face.  
 Knowing Doc, he will probably fall over while tending his power hacksaw, 
 making parts to fix a broken well tender rig.  He and his son turn away work 
 all the time.

Did I hear BANJO!?  :-)  I've built banjos for several years now.  I
don't have a CNC machine yet but when I do I'll use it for some of my
banjo work.  I'm currently working for CandCNC (www.candcnc.com) part
time putting together, testing, and repairing all our CNC electronics.
I helped with the design for our latest pendant and wrote all the
firmware and the Mach3 plugin for it.

We currently only support Mach3 but I'm hoping to get some time to work
on EMC (I've been a linux guy for about 8 years now) and get our
products working with it (some work already but others will need some
extra work).

I'm still a little wet behind the ears though at 31 :-)

Moses McKnight
www.mcknightinstruments.com

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