Re: [Emc-users] Carving a spiral

[BRIAN GLACKIN]

Probably way to late the discussion but….

In the wiki under O-word example, there is an example for a “Spirograph”
which if my maths are right would simply be a 2d spiral.

Here’s the actual cutting snippet from the wiki.



(here is the actual cutting - I don't have any z in it yet)
o250 do
#15=[[#1+#2]*COS[#4] - [#2+#3]*COS[[[#1+#2]/#2]*#4]]
#16=[[#1+#2]*sin[#4] - [#2+#3]*sin[[[#1+#2]/#2]*#4]]
g1 x[#15]y[#16]f200
#4=[#4+#5]
o250 while [#4 LE #14]

The only thing missing is adding in the Zed coordinate as the original
poster indicated in his comments.  It is essentially a 3d helical routine.

Sub-routines require some mental gymnastics to keep up with but can be a
“stimulating “ challenge to solve especially if it results in a reusable /
configurable tool.

Bg

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Re: [Emc-users] Not so slight problem with spindle/tools

[BRIAN GLACKIN]

The mining industry uses these washer stacks to secure replaceable wear
plates in Jaw crushers.  Twist the nut down until the compressed washers
all fit into a “cup” and viola bolt is torqued and the bolt has additional
springiness beyond just the steel of the bolt

I would agree with Todd replacement is best as these are technically “wear
parts”. But sounds like the ability to do this job was redesigned to be
costly and less repairable.

Can you add an extension the rod and add an additional stack of washers in
a more convenient location?   Got a cross section of the area?

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Re: [Emc-users] silly Q #42

[BRIAN GLACKIN]

I have a few old buckets around with brushed motors. Have replaced the
bronze bushing with sealed bearing and replacement brushes.

On Thu, Oct 12, 2023 at 1:46 PM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

>  4HP=2.9828 kW
>
> I(A) = 1 kW × 1,000 / 120 V
> I(A) = 1,000 W / 120
> I(A) = 8.33 A
>
> So, generating 1 kW of power at 120 volts will draw 8.33 amps of current.
> After looking at this, I may never run my Shop Vac again.
> Scott
>
>
> On Wednesday, October 11, 2023 at 08:07:11 PM CDT, gene heskett <
> ghesk...@shentel.net> wrote:
>
>  I blew up old bucket-vac by putting a larger diameter hose on the
> intake.  This raised the air flow and the amps it drew, and apparently
> tripped a one time thermal fuse about 9 minutes into a 12 minute job.
>
> So now I am adapting by 3d printing, all the plumbing to use a 5 gallon
> wet-r-dry as a vacuum src, but this puppy came with a different motor
> claim, 4 hp peak, and no amperage data where the decade + older
> bucket-vac claimed 6.5 amps and IIRC 2.5 hp.
>
> This one claims 4 hp peak but that is likely only for short term use and
> this may run for a day at a time, possibly even longer. Sucking up swarf
> or saw dust as my go704 works.
>
> I have no clue how to translate 4hp into the amps I'd see on an Amprobe
> which would equal 4hp on a 125 volt circuit. What I intend to do is
> restrict the size of the intake nozzle until the amps drop to whatever
> corresponds to 3.5 hp.  These things are $50 a pop at Wallies, and I'd
> like to run it at something resembling a CCS rating.
>
> Does anyone have a clue how to translate that 4hp into amperage for the
> motor?
>
> 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] Sewing Machine Stiffness

[BRIAN GLACKIN]

Very true

For the most part the knowledge was misplaced with the fall of said empire.

For over a millennia after, lime mortars were the main “cement” but was not
“hydraulic” (set under water) like the original Roman cement.  Very
important when building harbors.

More modern cements originate from work by Aspdin (sp) from Leeds in the
early 1800s.

Advances in kiln technology (rotary) in the end of the 1800s and early
1900’s is what led to wider acceptance.

The ability to manufacture cement is heavily dependent on the development
of machine tools to produce the equipment needed.

Full circle

On Tue, May 23, 2023 at 6:41 PM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

>  Practical concrete was created by the Romans and in use from around
> 600BCE.
>
> Scott
>
>
> On Monday, May 22, 2023 at 05:37:46 PM CDT, BRIAN GLACKIN <
> glackin.br...@gmail.com> wrote:
>
>  Thanks Andy
>
> The articles I knew of were of much more recent vintage.
>
> This article confirms the design was originally for “shell” lathes where
> they could manufacture a lathe in place and have it operational in 30ish
> days.  I was surprised it was WW1 as the cement technology at the time was
> rapidly evolving.
>
> By
>
> On Mon, May 22, 2023 at 4:28 AM andy pugh  wrote:
>
> > On Sun, 21 May 2023 at 23:57, BRIAN GLACKIN 
> > wrote:
> >
> > > During ww2 they made lathes bodies out of concrete with imbedded steel
> > > parts that were jigged in form or line bored for the spindle and tail
> > > stock.
> >
> > More info here:
> >
> >
> https://flowxrgdotcom.files.wordpress.com/2011/07/new-method-of-building-lathes.pdf
> >
> > (and it was actually WW1, the article is from1916)
> >
> > --
> > 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] Sewing Machine Stiffness

[BRIAN GLACKIN]

Thanks Andy

The articles I knew of were of much more recent vintage.

This article confirms the design was originally for “shell” lathes where
they could manufacture a lathe in place and have it operational in 30ish
days.   I was surprised it was WW1 as the cement technology at the time was
rapidly evolving.

By

On Mon, May 22, 2023 at 4:28 AM andy pugh  wrote:

> On Sun, 21 May 2023 at 23:57, BRIAN GLACKIN 
> wrote:
>
> > During ww2 they made lathes bodies out of concrete with imbedded steel
> > parts that were jigged in form or line bored for the spindle and tail
> > stock.
>
> More info here:
>
> https://flowxrgdotcom.files.wordpress.com/2011/07/new-method-of-building-lathes.pdf
>
> (and it was actually WW1, the article is from1916)
>
> --
> 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] Sewing Machine Stiffness

[BRIAN GLACKIN]

Epoxy is a bonding agent
Fiber (glass or otherwise) add cross linking in the resulting matrix.

Thes two Used alone, the resulting composite will be weak.

You need sized aggregate to make a much more rigid and robust structure.
The epoxy is then strongest bonding all these parts together

Sand and fines to fill the spaces between larger aggregate.   The top size
of the aggregate will depend on the thinnest portion of the structure but
generally 13-19 mm max.

During ww2 they made lathes bodies out of concrete with imbedded steel
parts that were jigged in form or line bored for the spindle and tail
stock.

https://www.engineeringforchange.org/news/the-concrete-lathe-world-war-i-technology-meets-21st-century-design/amp/


Brian
A guy that crushes rock for a living

On Sun, May 21, 2023 at 5:41 AM gene heskett  wrote:

> On 5/21/23 05:00, Nicklas SB Karlsson wrote:
> > lör 2023-05-20 klockan 23:28 +0700 skrev Thomas J Powderly:
> >>
> >> I saw an overarm router recently
> >>
> >> and wondered if a sewing machine frame was stiff.
> >>
> >> Compared to a desktop gantry mill.
> > Gantry ought to be more stiff.
> >
> >
> That depends on the gantry, my 6040's x rods could be stiffer than they
> are, so light cuts are the order for smooth finishes. as is a mist
> coolant directed at the tool.
> >
> >
> > ___
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> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> 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] Production machine running linuxcnc.

[BRIAN GLACKIN]

For some high production value machining video.  Check out “Titans of CNC
Machining” on YouTube.  These are very high impact videos that “advertise”
the capabilities.  I think these utilize all the points Chris makes and
then go well beyond.

Not suggesting you have to go to thier level but offering additional
inspiration.


On Tue, Nov 22, 2022 at 2:01 PM Chris Albertson 
wrote:

> The content looks good but if the goal is to advertise, then you need to
> "up" the production values considerably.
> This is more than good enough to show us, but "fair" video production
> quality will put the company in the wrong light.
> So in order is importance:
>
> 1) *BUY A TRIPOD.*  This is an absolute "must".
> 2) Your video has what we call "artifacts".  It is VERY compressed, perhaps
> you can change the setting. The compression artifacts are noticeable and do
> not give the "clean high precision" "look" you need.   If it means spending
> $350 on a good used camera, do it.  This work needs to be shot is a MINIMUM
> of 1080p 60 FPS with the highest bit rate you can do.
> 3) Possibly use some "EQ" on the audio. taking off some of the higher pitch
> noise is unrealistic, but more pleasant to listen to.
>
> Yes, video is an entirely different skill set than machining.  The
> current video is very good to show other machinists what you can do,
> but advertising is a whole different ball game and does not depend on
> logic,   You would think a potential customer would say "this guy is
> obviously an expert CNC machinist, but only a fair videographer."  No, they
> don't think like that, they "experience" the video and remember the
> experience.
>
>
>
> On Tue, Nov 22, 2022 at 10:30 AM andrew beck 
> wrote:
>
> > Hey guys I made this video last night of my machine running on a part
> > thought you might like it.
> >
> > Running linuxcnc and preloading tool for toolchange
> >
> > Plus 4th axis etc
> >
> > I'm hoping to start making a lot of these to both advertise for my
> machine
> > shop and to show how good Linux CNC is.
> >
> > And that you can run big machines on it.
> >
> > https://youtu.be/kzaxBU0EVr0
> >
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> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
>
> --
>
> Chris Albertson
> Redondo Beach, California
>
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Re: [Emc-users] Linuxcnc OEM?

[BRIAN GLACKIN]

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://linuxcnc.org/docs/html/common/emc-history.html


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://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftsap
> > ps.nist.gov%2Fpublication%2Fget_pdf.cfm%3Fpub_id%3D820252data=05%
> > 7C01%7Ctoddz%40pgrahamdunn.com%7C88e644dce51b4c4f1d9908da6b515c04%7C57
> > 58544c573f47cebee96c3e0806fb43%7C0%7C0%7C637940294428622958%7CUnknown%
> > 7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX
> > VCI6Mn0%3D%7C3000%7C%7C%7Csdata=kULzq7GHrdEhnT5bwkGS4m%2FJ4W7Cawt
> > 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:
> > >>
> > >> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fw
> > >> ww
> > >> .probotix.com%2Fdata=05%7C01%7Ctoddz%40pgrahamdunn.com%7C5f7b3
> > >> 42
> > >> d131c48e6d8d108da6b1e4c91%7C5758544c573f47cebee96c3e0806fb43%7C0%7C
> > >> 0%
> > >> 7C637940075123777231%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC
> > >> JQ
> > >> IjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdat
> > >> a=
> > >> oBCdxfAcAyiPorL%2FZO%2F%2Fy6b%2BgdPDg%2FPTA2K48detEGg%3Dreserv
> > >> ed
> > >> =0
> > > Which mentions that they have (amusingly) sold LinuxCNC systems to
> > > NIST. :-)
> > >
> >
> >
> >
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> > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist
> > s.sourceforge.net%2Flists%2Flisdata=05%7C01%7Ctoddz%40pgrahamdunn
> > .com%7C88e644dce51b4c4f1d9908da6b515c04%7C5758544c573f47cebee96c3e0806
> > fb43%7C0%7C0%7C637940294428622958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4w
> > LjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C
> > sdata=HM4wrZLvVA7UX5B%2BP%2BMvTn2QwKMd7VaaBBJWnAEfnng%3Drese
> > rved=0
> > tinfo%2Femc-
> > usersdata=05%7C01%7Ctoddz%40pgrahamdunn.com%7C5f7b342d131c48e6d8d
> > 108da6b1e4c91%7
> > C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C637940075123777231%7CUnkno
> > wn%7CTWFpbGZs
> > b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D
> > %7C3000%7C%7C%7C&
> > amp;sdata=74CIIufVCLVu6v6o4dJJsd5FQXhlyIRE59NmdH1u0v4%3Dreserved=
> > 0
> >
> >
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> > ddz%40pgrahamdunn.com%7C88e644dce51b4c4f1d9908da6b515c04%7C5758544c573
> > f47cebee96c3e0806fb43%7C0%7C0%7C637940294428622958%7CUnknown%7CTWFpbGZ
> > sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3
> > D%7C3000%7C%7C%7Csdata=%2BngLNqbkZPJclbYG7yPw8yivQqZvQZoklBCq%2BU
> > mq5IM%3Dreserved=0
>
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Re: [Emc-users] Clausing NC Spindle drive belt tension and noise.

[BRIAN GLACKIN]

Regarding belt tension. Goal is to get engagement with the minimum amount
of tension.  This ensures the bearings on motor and driven pulley shafts
are not overloaded.

I work with very large bearing and or bushed machines.  (Crushing
equipment). Standard rule of thumb is 1/64” of deflection per inch of
distance between the shaft centers at 22lbf

We usually avoid tensions greater than 30lbf.

With the smaller bearing diameter I suspect target force is lower.

Brian

On Mon, Jul 4, 2022 at 1:08 PM andy pugh  wrote:

> On Mon, 4 Jul 2022 at 17:04, John Figie  wrote:
>
> > > https://www.roll-ring.com/?lang=en
> > >
> > Andy, That is a nice idea. However in my case I don't think I would
> > have clearance.
>
> It could go at the bottom, nearer the drive motor.
>
> The belt on my Holbrook is a rather wide poly-vee. Very quiet. I have
> a much smaller, small pitch toothed belt to drive the encoder.
>
> --
> 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] Dynamic Soft Limits?

[BRIAN GLACKIN]

I can envision three scenarios that have to be considered from my very
limited experience.

Scenario 1 - Fixed timing - When tools are set up relative timing of the
operations do not vary.  Throughout the run of the program, the operations
will be in a coordinated dance that will be known up front and collisions
are anticipated and handshakes will be instituted for one operation to take
precedence in that collision zone/time.  Lots of setup and upfront analysis
- Once set, no changes can be allowed.  Probably what is done now if at all.

Scenario 2 - Dynamic Timing - This would be where the operation timings are
allowed to vary either by operator choice such as slowing/speeding up one
operation due to wear concerns or interruptions.  In this second scenario,
it seems you would need 3 trajectory planners  - one for each operation and
one to coordinate the "dance" between the two.

Scenario 3 - Priority - In this you would essentially have just two
machines.  When one operation first enters the overlap area, a switch flags
"I own the space".  The operation would then continue until it exits the
space where the switch flips to "space open".  If during this time, the
second machine is approaching the overlap, it would see the flag and either
slow its approach (if there is a timer associated with the flag and
communicated by the trajectory planner of first operation) or stop until it
sees the "space open" flag.   It would then resume into the overlap and
take control of that space until it exits.  Outside of the overlap area,
the operations would not be limited.

Either way, I imagine interruptions to operations/machine movements that
probably should not be interrupted.

Just some thoughts.  Your concept made my mind wander for a bit and I am
most likely all wet.


On Fri, Feb 2, 2018 at 1:06 PM, Todd Zuercher <zuerc...@embarqmail.com>
wrote:

> That was the idea.
>
> - Original Message -
> From: BRIAN GLACKIN <glackin.br...@gmail.com>
> To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
> Sent: Fri, 02 Feb 2018 12:50:03 -0500 (EST)
> Subject: Re: [Emc-users] Dynamic Soft Limits?
>
> Are you going to have multiple tools working within the same work envelope
> on the same piece?
>
>
> On Fri, Feb 2, 2018 at 11:47 AM, Andrew <pkm...@gmail.com> wrote:
>
> > 2018-02-02 16:49 GMT+02:00 Todd Zuercher:
> >
> > > For example X can travel from 0-100, and U can travel from 20-120, U
> can
> > > be located in any position in its travel so long as it is greater than
> X,
> > > and X can only go to a position less than U.
> > >
> >
> > Might be a job for inihal pins ini.N.ini_limit and ini.N.max_limit.
> > 
> > --
> > Check out the vibrant tech community on one of the world's most
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>
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> mailto:zuerc...@embarqmail.com
>
> 
>
> 
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Re: [Emc-users] Dynamic Soft Limits?

[BRIAN GLACKIN]

Are you going to have multiple tools working within the same work envelope
on the same piece?


On Fri, Feb 2, 2018 at 11:47 AM, Andrew  wrote:

> 2018-02-02 16:49 GMT+02:00 Todd Zuercher:
>
> > For example X can travel from 0-100, and U can travel from 20-120, U can
> > be located in any position in its travel so long as it is greater than X,
> > and X can only go to a position less than U.
> >
>
> Might be a job for inihal pins ini.N.ini_limit and ini.N.max_limit.
> 
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Re: [Emc-users] MachineKit on the BeagleBone Black

[BRIAN GLACKIN]

John,

Whether you think this is blown out of proportion or not, you inquiry has
led to a very vigorous discussion of how to manage settings and the vision
of software development and how that relates to this project.

I rarely post and do not have a strong code writing background but have
followed this subject over the past few days with interest.  I certainly
believe that this has sparked some of the creative juices in some of the
readers/respondents.

I certainly can appreciate your frustration with the .ini files having had
to slog through those a number of years back with EMC 2.2 or thereabouts.
The PNCConfig tool was a huge upgrade when it came out.  I for one was
unaware of the challenges of maintaining it until this discussion.  Perhaps
this and future discussions by experts with various coding techniques will
help simplify the  challenges of maintaining tools like PNCConfig and
advance this software closer to the lowly dumb users like myself.

Thanks for your inputs and questions.

B.

On Fri, Oct 13, 2017 at 2:18 PM, John Dammeyer 
wrote:

> This has been blown way out of proportion.  The only file I'd like to see
> more organized is the files like Xylotex.ini and the Xylotex.hal files.
>
> Look.  Everyone is already creating .ini files.  And they are crap.   I was
> trying to improve things.  I think there should be the ability to throw up
> a
> form on the screen and fill in the blanks rather than hunting through years
> old help messages and documents to try and figure out why something doesn't
> work and editing text files.
>
> However, few people on this list appear to be using the Beagle with
> MachineKit to run a Milling Machine so I think at this point this subject
> line is dead.
>
> John
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: October-13-17 11:00 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] MachineKit on the BeagleBone Black
> >
> > On Fri, Oct 13, 2017 at 2:48 AM, andy pugh  wrote:
> >
> > > On 13 October 2017 at 08:20, John Dammeyer 
> > wrote:
> > >
> > > > There's no reason to not have an XML file (or larger database for
> that
> > > matter) that includes min/max/default values along with several strings
> for
> > > help information.
> > >
> > > Who will maintain this XML file? PnCConf uses XML files to store the
> > > possible configurations for each card. The author ended up with an
> > > almost full-time job keeping the data up-to-date
> >
> >
> > The best solution is that the authors of the software that accepts the
> > parameters
> > each define the parameters they use. then the central database is
> > maintained by
> > scanning those definitions.   This way the database if self maintained
> and
> > kept up
> > to data.
> >
> > It is never good to define something in two places.  A central XML file
> is
> > in effect
> > keeping the definition in two places, once it it implicitly in the code
> > that uses the
> > parameter and again in the XML file Better to place the the entire
> > definition in one
> > source file.
> >
> > How to do this?  Lots of ways, macro processor, function calls or
> > specialized comments
> >
> >
> >
> > --
> >
> > Chris Albertson
> > Redondo Beach, California
> >
> 
> 
> --
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>
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Re: [Emc-users] 3 d metal printer

[BRIAN GLACKIN]

The name "concrete" is misleading.  The paste is more of a grout using fine
aggregates whereas concrete typically has coarse aggregates.  With the
absence of coarse aggregates, the vibration requirement is minimized.  As
for reinforcement, simple paste as shown would be weak indeed unless they
are adding fibers to the mix (glass, polyester, metal are typical) which
would be likely in this case although not stated.  The "laminations" would
likely impart some strength as well.

As for fireproof, the structure has little in it (other than furnishings)
that would be combustible.

A final concern is the strength of the mix.  Typical cement mixes achieve
~15% of their strength in 24 hours (full strength in 28 days).  Again
additives or high early strength mixes could be used which could solve
that.  Either way, I would want the structure to fully "cure" prior to
moving in.  That means for me waiting a month no matter how fast they print
it.

I find the technology interesting and in certain circumstances could be
useful for developing structures in remote areas where transporting
pre-engineered structures and or components might be cost prohibitive.
Apic Cor has a video of them printing a "house" and how they reinforced and
insulated the structure for -35C conditions.  Kinda smallish but it can
easily be nested with other units to create office/work and or living
spaces.



On Wed, Jun 21, 2017 at 11:49 AM, Nicklas Karlsson <
nicklas.karlsso...@gmail.com> wrote:

> > 3D concrete printing
> >
> > https://www.youtube.com/watch?v=zb3zuk1qNDk
>
> Without rebar and vibration concrete will be weak, maybe it's good enough
> for a real firewall?
>
> 
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Re: [Emc-users] Hot wire foam cutter [Was: Cast Bracket for FHA-25 Harmonic Actuator.]

[BRIAN GLACKIN]

Hot wire knives need not have all the fancy electronics.  I do a merit
badge course every winter with the local council's STEM U.  One of the
projects I have them construct a "cooler" out of the blue construction foam
insulation board using glue/tape/other means to assemble pieces of cut
foam.  Before starting, I have them construct "cutters using 2 large pop
sticks covered in aluminum foil and a piece of welding wire strung
between.  For a power source its a D cell battery.  The assembled knife is
the battery in the palm of their hand with the sticks on each pole.

Every year I say, DO NOT TOUCH THE WIRE - IT GETS HOT!  Invariably, one
scout has to "touch it".  It does not get real hot - probably up to 350 F
depending on the strength of the battery used.

I usually have to keep the kids on track because they become fascinated
with "carving" the foam with this simple tool.

bg

On Wed, Apr 5, 2017 at 10:16 AM, Gene Heskett  wrote:

> On Wednesday 05 April 2017 03:13:07 Erik Christiansen wrote:
>
> > On 04.04.17 12:29, Gene Heskett wrote:
> > > On Tuesday 04 April 2017 06:04:50 Erik Christiansen wrote:
> > > > On 04.04.17 05:00, Gene Heskett wrote:
> > >
> > > Those scraps of that blueish foam have all been binned or used years
> > > ago. And Lowes no longer carries that same board in 2" R22
> > > thickness. The current product the last time I looked is a white,
> > > larger cell product and only about R20 because of that, but its the
> > > same $35 & tax a 4x8 foot sheet.  How it would cut with a hot wire
> > > would be TBD.
> >
> > Should be good. It's when resorting to a cold sharp knife that the
> > "melded bean bag fill" crummy foam crumbles.
> >
> > ...
> >
> > > How hot does the hot wire need to be?
> >
> > Just go by feel. This one suggests 600°F (that's 315°C, which sounds
> > like a good starting point):
> > https://www.youtube.com/watch?v=3GWzHb4Hd8Y
> >
> > but with a 555 & MOSFET, you can PWM your way to happy cutting from
> > 12v with most bits of recycled nichrome wire even a foot long.
> >
> > Some make the frame from wood - that'd be more rigid than his.
> > (I've welded a couple of small bits of RHS together, added a baseplate
> > to screw to an old chipboard kitchen sink cutout (melamine topped),
> > and need to rout a slot from the edge to the base of the wire, for an
> > Al T-slot, so I can slide a vertical pin back & forth for setting
> > radii for cutting disks, rings, and cylinders.
> >
> > > Seeing as how thats best jiggered up as a wire support frame I could
> > > stick in a vise on the g0704's table and rig some sort of a sheet
> > > gripper leaving a cutaway, for the hot wire to move within, attached
> > > to the chip pan, if I get it rigid enough to keep its place as the
> > > wire moves, I could probably just write gcode to drive the cutters
> > > path. Where it needs a lid like the outside face of a belt cover,
> > > just cut the outline out and glue it on.
> >
> > Takes a while to build, though. Sketching the outline on the back of a
> > cornflakes packet, cutting it out with scissors, running around it
> > with a ballpoint pen on the foam, then carefully following it by hand
> > with the hot-wire cutter, is quicker. (I don't know of a good
> > temporary adhesive for sticking the template on the foam without
> > tearout on removal.)
> >
> > > But, I think buying the printer would get me a nicer looking belt
> > > cover.
> >
> > The printed product could perhaps be used directly, instead of then
> > making a casting, and machining it where necessary?
> >
> > Erik
>
> That would be the intention. Barring an errant hammer blow to break it,
> probably loose by snapping off a mounting tab, a lot of swarf could even
> be hot enough to stick to it, but would brush off when cooled.
>
> Without the spindle turning but the motor running at 30hz, it has set out
> there and run all night, no joint errors. So I next write an infinite
> loop, moving each axis back and forth half an inch at about 20 ipm. I
> have got to find the source of the joint errors. They hit random joint
> numbers, often both joints when only one joint is moving. I am convinced
> its a comm error as I have seen the tach dial jump to 400 or 500 rpms
> when its not turning. Not often but thats also a joint error for both
> joints.
>
> And since rockhopper is the only tool I know of that will output the
> signal path so that can be compared to the addf order, I just tried to
> install that, but apt couldn't find it in the pi's repo's. :(
>
> Time to print out the hal file and trace thru it, putting a number at
> each addf as the signals make their way thru the modules loaded. Thats
> getting complex as the hal file, with all these jog-wheel additions, is
> 19 landscape printed pages now. In the finished trace, the numbers in
> each thread should be in order. I suspect the servo-thread is not in
> order so I'll trace that first. And the spi buss is so timing critical I
> can't even hang a 10x scope 

Re: [Emc-users] Machinekit? --> NML --> Horrible procedures

[BRIAN GLACKIN]

Also consider that translation plays a role. Looking at an english "legal"
or legal like document is scary enough for regular english speakers.  Add
in translation and then compound that scary feeling.

On Mon, Oct 24, 2016 at 3:38 PM, Nicklas Karlsson <
nicklas.karlsso...@gmail.com> wrote:

> NO, I stay with Linuxcnc. I stayed at place with procedures for five years
> but once I got better economy I started to look for something else.
> Procedures is tolerable if salary is good enough and I need the money.
>
>
> This time I will look at NML as soon as there is enough time and do not
> care about the other stuff.
>
>
>
> On Mon, 24 Oct 2016 11:35:09 -0700
> Chris Albertson  wrote:
>
> > He said "horrible" not "well defined". To be horrible yo'd have to
> > find many bullets in the C4 document that are not reasonable   for
> > example he might object to"A patch MUST adhere to the code style
> > guidelines of the project if these are defined."
> >
> > I doubt anyone would call that document horrible,  All it really does
> > is but on paper what most projects try and do.  A slight disagreement
> > with some small point maybe
> >
> > If you want "Horrible" there was a rule at one Microsoft group that if
> > your contributed code broke the nightly build process you had to wear
> > the Viking helmet with horns all day the next day.   Everyone would
> > know you checked in untested code to day before. ("but I only changed
> > one line!")
> >
> > Actually is IS like working at a big company.  You have a few dozen
> > people all editing the same files at the same time.   And a few
> > thousand users who depend of your work to be correct.   It's a recipe
> > for failure if not for some rules
> >
> > On Mon, Oct 24, 2016 at 9:28 AM, John Kasunich 
> wrote:
> > > I think Nicklas might be referring to this:
> > > http://www.machinekit.io/community/c4/
> > > It's a formal sounding document
> > >
> > > On Mon, Oct 24, 2016, at 12:19 PM, Chris Albertson wrote:
> > >> On Mon, Oct 24, 2016 at 8:37 AM, Nicklas Karlsson
> > >>  wrote:
> > >> " ... horrible procedures for developers ..."
> > >>
> > >> Hard to answer your question as it depends on what you think of as
> > >> being "horrible".Can you be specific?
> > >>
> > >> They are using Git and do have some rules like your code has to
> > >> compile, pass self tests and you need to supply an explanation of what
> > >> it does and so on.  very basic stuff like that.
> > >>
> > >>
> > >> --
> > >>
> > >> Chris Albertson
> > >> Redondo Beach, California
> > >>
> > >> 
> --
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> > >> https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> > >
> > > --
> > >   John Kasunich
> > >   jmkasun...@fastmail.fm
> > >
> > > 
> --
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> >
> >
> >
> > --
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> > Chris Albertson
> > Redondo Beach, California
> >
> > 
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Re: [Emc-users] drive belt for 7x12 NOT OEM

[BRIAN GLACKIN]

Gene,

I have a 3 ton engine lift you can have to maneuver things about, but I
doubt you want to trek clear across PA to the Philly area to get it.

On Wed, Jun 1, 2016 at 2:42 PM, Gene Heskett  wrote:

> On Wednesday 01 June 2016 12:12:11 Todd Zuercher wrote:
>
> > Sorry Gene, but I have to say this.
>
> Don't be sorry Todd, I am well aware of the need, and in between
> honeytdo's and my back playing out and screaming for another pill, I am
> working on making room in the garage for the cure, with a Sheldon
> nameplate on it.  But I also have to round up a 1 ton rated or better
> crane to set it in place with when I get back with it on a u-haul
> trailer sometime next week.  But at the instant, no place to put it
> exists.  So first stop is Lowes for a set of shelves about 7' high with
> at least 7 or 8 shelves so I can sort, this hand in the trash trailer
> and that hand on a shelf for later use by a confirmed packrat. But first
> I have to clear in front of a single shelf and worktop 2' x 4' $20 thing
> and convert it to trailer filler once I've moved about a thou in clamps
> of various ancestry off its single shelf.  With my back, thats all of 2
> days work for me.  Too bad I can't replace it for the same price as this
> lathe. :(
>
> > As much as we've heard you
> > complain about how worthless your lathe is, perhaps it is (or well
> > past) time to cut your losses with that thing and move on with
> > something a little more up to the task.
> >
> > - Original Message -
> > From: "Gene Heskett" 
> > To: emc-users@lists.sourceforge.net
> > Sent: Wednesday, June 1, 2016 11:58:27 AM
> > Subject: Re: [Emc-users] drive belt for 7x12 NOT OEM
> >
> > On Wednesday 01 June 2016 11:39:21 andy pugh wrote:
> > > On 1 June 2016 at 16:19, Gene Heskett  wrote:
> > > > that lower pulley in the OEM version is abs plastic, and
> > > > I've burned up at least a 12 pack of them puppy's along with the
> > > > belt, which strips its even lower profile teeth, and by the time I
> > > > can hit the big yellow button, the pulley is burned to an
> > > > unrecognizable mess with the cogs all smeared against each other.
> > >
> > > Have you considered the use of bicycle chain?
> >
> > Even #25 is too big Andy. I have a roll of it with 4 or 5 feet left. I
> > think the same would apply to your r1's timeing chain too, in this
> > cramped space.
> >
> > Cheers, Gene Heskett
>
>
> Cheers, Gene Heskett
> --
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Re: [Emc-users] Tool Marks?

[BRIAN GLACKIN]

I concur with Nicklaus. This looks like normal wood grain (each year ring
having a harder and softer section) with the exception of the near center
of view.  In this case it looks like the grain was compressed near a
branch/knot.  This is all mute it that is not a piece of wood.

On Tuesday, May 24, 2016, Nicklas Karlsson 
wrote:

> I can see the figure but are nor sure I could see the tool marks. Is the
> wood dry? Are you feeding to fast?
>
> On Tue, 24 May 2016 10:14:17 -0400 (EDT)
> "Todd  Zuercher"  > wrote:
>
> > Anyone know the root cause of tool marks like this? Or better yet how to
> prevent them? The lines are not in a straight line or consistent angle, in
> fact there are places on this piece where they wave up and down.
> >
> > The tool is a 1/4inch solid carbide down spiral, cutting at 200ipm
> turning 17,000rpm cutting 1/2" MDF in a single pass. In the picture you can
> see about a half inch long section of the cut where the cut is nice and
> smooth, this is where the ramp in point is (start of the cut). The machine
> is a very large (5ftx10ft) moving table fixed bridge commercial router
> (Komo) with a 14KW spindle and HSK63F tooling.
> >
> > It does kind of give the piece a sort of simulated wood grain look. I've
> playing with the amount of tool sticking out of the collet can make it
> better or worse, finding the sweet spot is a bit of trial and error, and
> 0.050 can make a big difference. You can hear the difference in the sound
> when you get it right, the cut is very quiet. If it gets bad enough the
> tool will snap. Also playing with the RPM can somtimes make it better.
> >
> > It is hard to believe that a carbide tool or collet could flex that
> much, but something sure seems to be vibrating.
> > --
> >
> > 
> >
> > Todd Zuercher
> > mailto:zuerc...@embarqmail.com 
> >
> > 
>
>
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Re: [Emc-users] Cutting cast iron with a dry diamond blade

[BRIAN GLACKIN]

Diamonds will cut just about anything.  The trick is matching the matrix
holding the diamond bits to the material being cut.  I have dealt with
diamond drilling quite a bit in my profession (mining of industrial
minerals).  The harder the materials to be cut, often the better the
diamonds like it provided the matrix wears out slightly faster than the
diamonds to prevent faceting of the exposed bits.  Always want to prevent
polishing of the diamonds.  Saw this in upstate New York gneiss where a
crew drilled 300 feet in 12 hours with an NQ bit (75.7mm dia with a 10.5mm
thick annulus).  Normal rates are 100-175ft in a 12 hour shift.  This
included punching through several seams of magnetite.  I would be more
worried about trying to cut aluminum where it would likely cold weld the
bit with or without water.

In drilling rock, water is key.  While I have not seen it, I have heard the
drillers talk of welding the drillbit to the end of the hole  several
hundred to thousands of feet downhole when they lost water circulation.
When that happens the pull out whatver part of the drilling head they can,
send a new bit downhole and drill through the parts stuck in the hole and
keep on trucking.

On Tue, May 10, 2016 at 6:02 PM, Dave Cole  wrote:

> On 5/10/2016 2:56 PM, Gene Heskett wrote:
> > On Tuesday 10 May 2016 11:47:13 Dave Cole wrote:
> >
> >> I've been doing the controls for a manufacturer of large core drill
> >> machines for about 10 years. The machines are made to drill holes in
> >> concrete structures that make up sewer systems.
> >> The machines can drill up to 60" holes using diamond segmented tipped
> >> bits.
> >>
> >> Diamond bits work great for concrete and stone and they do ok when
> >> sawing through the wire reinforcement in the concrete as well (up to
> >> about 1/2" rebar reinforcement).
> >> Water is always used with those bits for maximum life.   However they
> >> don't need a lot of water.  Just enough to wash away the grindings.
> >> With smaller bits (12-24") in diameter, the machines can achieve feed
> >> rates of 4-5 inches per minute even when chewing through wire
> >> reinforcement.   Diamond tipped saw blade "teeth" are really tiny
> >> diamonds in an alloy matrix which rubs against the material to be cut.
> >> Its really more of a grinding process than a cutting process.   A good
> >> diamond tipped concrete core drill can drill through 100+ feet of
> >> concrete before needing to be re-tipped if the core drill is treated
> >> properly.
> >>
> >> I've never heard of diamond bits being used to solely cut cast iron.
> >> I would think that Carbide or HSS would be preferable.
> > Both would need large amounts of torque I don't have.  My mill spindle is
> > 1 HP, and not enough backgear to pull that off.  So slow, dry, no sparks
> > allowed, has now done the job with a $45 10 continuous edge Dewalt
> > blade.  And it seems to be taking less power to deepen its kerf now than
> > when I started. Piece is now chucked in the lathe's 4 jaw, and I'm
> > trying to make it round, but my backs stand up time has been exceeded
> > for a couple hours.  So I'm fielding email and may even see if I can get
> > some afternoon nap in since I was up, in pain, about 1/2 the night last
> > night.
> >
> > Cheers, Gene Heskett
>
> And you probably don't want to use a water hose to wet down the blade
> even if it makes the blade last longer ..  ;-)
>
> I've had good luck using 7 1/4" circular saw blades designed to cut
> steel.   They have come down in price quite a bit.   I used them to cut
> 1/2" and 3/4" plate steel.
> I used it with a worm drive circular saw.The sparks were pretty
> spectacular.   I think that first blade I bought cost $60 or so probably
> 15 years ago.I think they are about half that now.
> They also work well cutting steel angle and bar if you don't have a
> bandsaw.   Just need to feed the blade into the steel carefully so it
> doesn't grab and wear a face mask and gloves.
>
> Dave
>
>
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Re: [Emc-users] Blacklisting parts of G-code

[BRIAN GLACKIN]

I rarely chime in as I am a novice on this list, but the engineering side
of me enjoys all the discussions.

Having a tool like your CNC router is a great addition to the open
community shop.  I would love to have access to a shop like yours in my
community.  But as you have found, the law of unintended consequences  is
coming quickly into play.  Without setting some rather straightforward and
strict protocols for "novices that have no lifetime commitment to CNC" can
result in screwed up settings as you have found already or lead to serious
injury or worse.

I would hate to see someones failure to take basic precautions (because you
were not there to watch/mentor/guide) leading to the removal of the tool or
closing of this community asset due to a novice's failure to follow
established rules.

just my 2c.


On Fri, Apr 22, 2016 at 12:15 AM, Danny Miller  wrote:

> It's an open-membership community shop.  A lot of people come with only
> one or two projects as a goal, not a lifetime commitment to a CNC
> career.  And they want to be the one to use the machine.
>
> Some have used the Shopbot without problems, yet ran into stuff pretty
> quickly with LinuxCNC here.  Not too familiar with Shopbot but it seems
> to be more basic and doesn't throw more complicated concepts into it.
> Nobody I know uses tool radius compensation, CAM is entirely what works
> that out.
>
> I can only "train" people so much.  I don't have control over their
> toolpath generation, so dictating preambles really isn't gonna happen.
> Not saying preambles don't make a lot of sense.
>
> Well, we found a problem tonight- the guy's copy of Vectric Aspire, when
> you select a "linuxcnc" target, generated this:
>
> G43.1Z1.7
>
> 1.7 was listed as the safe-z height.  There's no reason I can see to put
> that into incremental Tool Offset.
>
> So then- get this- we selected "linuxcnc ARC" instead, whose only
> difference is supposed to be that circular arcs are made with G2/G3 arcs
> instead of many linear points.  Lo and behold, the G43.1 command did NOT
> end up in the output file.  Tried it several times.  Wouldn't believe it
> if I hadn't seen it.
>
> Danny
>
> On 4/21/2016 7:57 PM, Bruce Layne wrote:
> > This sounds a bit more like a philosophical question than a technical
> > question.  On one end of the spectrum are machinists, and part loading
> > monkeys are on the other end of the spectrum.  We're all somewhere on
> > that spectrum, and that's fine, as long as we operate within our
> > abilities.  It seems that your problem is that machine operators are not
> > operating within their abilities.  Maybe that's a training issue.  If
> > training doesn't work, maybe take away their keyboards and give the
> > operators a jog pendent and a user interface with CYCLE START,
> > PAUSE/RESUME, CYCLE STOP and EMERGENCY STOP.
> >
> > More to your inquiry, there are some tips and tricks that can help, but
> > not completely cure the problem you described.
> >
> > You should be able to set the privileges for each G code file or G code
> > directory so the operator can read but not write over the existing file.
> >
> > It's a good practice to have a line at the start of each G code program
> > that's similar to the startup code you listed, so every time the G code
> > is executed, it returns the machine to a known condition that is fully
> > determined so the program operates the same each time it's run.
> >
> > I'm sure others will chime in with useful suggestions, but there is no
> > such thing as foolproof.  As a manufacturing engineer, I long ago
> > learned to never underestimate the creativity and perseverance of a
> > determined fool.
> >
> > You could also post the following sign on each machine:
> >
> >  *ACHTUNG!*
> >  ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS!
> >  DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND
> >  MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK,
> >  BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKEN.
> >  IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN
> >  KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS.
> >  ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN.
> >
> >
> > https://en.wikipedia.org/wiki/Blinkenlights
> >
> > Good luck!
> >
> >
> >
> > On 04/21/2016 08:02 PM, Danny Miller wrote:
> >> We're running a manual-toolchange CNC router in an open shop with
> >> beginner users.  From Day 1, some things I thought would never happen
> >> somehow happened.
> >>
> >> Someone somehow set G64 Path Blending, and to a very high value,
> >> rounding off all the cuts.
> >>
> >> Someone managed to set Tool Length Offset, which makes no sense on a
> >> manual toolchanger.   This left the machine screwed up all day.
> >>
> >> Really there's no point in these existing.  Now I KNOW I can reset this
> >> stuff at startup:
> >>
> >> RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 G97
> G98
> >>
> >> Sure.  And I do.  

Re: [Emc-users] Wood expertise needed, on bending/flattening mahogany

[BRIAN GLACKIN]

Gene,

Two items,

First - check out http://www.leevalley.com/en/html/05F1501ie.pdf

has a nice writeup on wood bending.  You are likely to find your answers
there.

Secondly, in using the foam, a quick and airtight technique is to connect
your corners of the foam boards with the 3X expansion foam they sell at
home stores.  Once it cures, its locked in giving you a nice strong
corner.  Make sure to leave a 1/2" gap between the pieces so the foam can
expand around each of the adjoining slabs.  I have made air stoppings (in
underground mines) using styro blocks and expanding foam.  It created
surprisingly strong barriers and gave an airtight seal.

Good luck.

On Fri, Mar 4, 2016 at 1:10 PM, Gene Heskett  wrote:

> Greetings; Mouse miss-fire before;
>
> The lids for these chests were the first things I tried to make out of
> this crappy, poorly seasoned & dried mahogany.
>
> So by now they've had about 90 days to warp, and warp and wind they have
> done.
>
> Now I know its a popular thing to warm up oak in a steam setup, getting
> the lignite in the oak above 180F softens it and allows it to be bent,
> and it will retain that bend when cooled again.
>
> I'd druther not use steam as this stuff reads 5% and below for moisture,
> and if its temp alone that allows this, it stands to reason that lignite
> is lignite and I'd ought to be able to heat this mahogany, and rather
> than bending it, take the bend/wind back out of it.
>
> So obviously I have to make a chamber big enough to take these lids, all
> 3 of them, which with the bearboards ends and all are around 1 and 1/16"
> thick, around 23" wide, and about 47" long. Thats a 2x6 frame for
> height, and half a sheet of plywood for top and bottom.  But without
> some insulation, hard to heat.  So I am contemplating giveing it a wrap
> with some 2" blue styro, thats r11 by itself.  That should, because it
> reduces the cooliing at the far end away from the heat source, even the
> internal temps.  As for the heat source, I'm considering demolishing an
> old hair dryer, mainly to remove the plastic as much as possible, at
> least cutting off the handle, and doing a light dimmer type of control
> externally to set the heat. I don't care if it takes days to warm it up
> as theres probably 40 lbs of wood to heat without scorching that which
> is nearest the heater, only that it does get hot enough eventually. The
> slower the better and more evenly would seem to be best when dealing
> with 1/4 a barn door sized stuff.
>
> So my lack of info basically consists of how hot do I have to heat this
> mahogany to the point where it will sag of its own weight and flatten,
> and, how hot can I get the outside of the box before that blue styro
> starts getting soggy?  I can put a small probe thru the box resting on
> the high point, or even stack 20 some pounds on it to add some
> counterforce to the wind its taken, and by that see it start to flatten.
> But that may need 200F or a bit more inside the box. IDK about mahogany.
>
> Maybe this is something Les Watts can advise on?  Maybe, because the wind
> is direction in-consistent, I might have to heat each one by itself.
>
> Advice needed OIW.
>
> Many Thanks to the wood people I know there are a few of here.
>
> Cheers, Gene Heskett
> --
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>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page 
>
>
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Re: [Emc-users] Stake in ball screw Cincinnati Arrow

[BRIAN GLACKIN]

A note on German wiring from the early 1990's.  At that time the Green
Party came in and pushed fro higher recycling.  Many manufacturers went
with a higher recycled content in their wire insulation to meet the edict.
Mercedes Benz was one of the earliest hit by this change.  Harness in the
W124 line of vehicles in 1993-1995, were failing after 2 years in service.
The recycled content made the covering brittle with exposure to heat in the
near term and generally shorter lifetimes.  Sounds like this hit machine
parts as well from that era.

On Sun, Feb 28, 2016 at 5:22 AM, Gregg Eshelman  wrote:

> On 2/27/2016 8:04 AM, Dave Cole wrote:
> > The nut and screw are matched to each other and then they fit the nut to
> > the screw with the proper sized balls.
> > Usually they are purchased together as a set and you really don't want
> > to take them apart unless it is necessary.
> > You can have screws reground - I think that Thompson and Nook others do
> > that in the US.
> > I suspect that if you have a "standard" screw you might be able to fit a
> > new nut to it, but then if the nut is shot, generally the screw also
> > needs help.
> > So what usually needs to be done is that the nut and screw need to be
> > reconditioned as a set.
> > I worked on a machine that had a bad screw and they got a quote from
> > Thompson or Nook to have the screw and nut reconditioned and I think it
> > was about half what a new
> > set would have cost.
>
> Some of them have every other ball slightly smaller as a spacer to
> reduce turning friction. Unfortunately that also cuts load capacity.
> What some rebuilders do is replace all the balls with ones of the full
> size, or if the screw has to be ground more than usual they'll install
> larger than original balls.
>
> If you have a screw with even wear along its length and a willingness to
> experiment, and precise way to measure ball diameter, you can buy new
> balls on eBay real cheap. Choose some just a smidge larger than what was
> in it and see if the screw tightens up, without binding.
>
> There's probably some formula to select the ball size required based on
> measuring backlash etc, but the balls are cheap enough to buy more than
> one size.
>
> What I'd like to see is a precision and accuracy test of a new ground
> ball screw VS a high grade rolled ball screw VS a rebuilt with full
> grind rolled ball screw.
>
>
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Re: [Emc-users] Machine zero, fixture offsets.

[BRIAN GLACKIN]

There I'd a oword subroutine in the wiki that jepler wrote for me several
years back. Basically a rectangular array that you spec rows, columns,
offset distance s and finally the code. I tweaked a copy to read a gcode
part file.

Used numerous times to cut out Xmas ornaments several years in a row for
swmbo.

Brian
On Aug 14, 2013 4:02 PM, John Thornton bjt...@gmail.com wrote:

 I do the same thing on my plasma cutter, jog to the start point and use
 the G92 magic.

 JT
 On 8/14/2013 1:45 PM, andy pugh wrote:
  On 14 August 2013 19:16, Kenneth Lerman kenneth.ler...@se-ltd.com
 wrote:
 
  Of course, if you think like a programmer and don't want to know
  anything about G92 or stuff like that, you just write a gcode subroutine
  to make the part. The subroutine takes two arguments, the X and Y
  coordinates of the (center, edge, whatever) the part.
  I have subroutines like this for connector cutouts, but they don't
  even take a position parameter.
 
  You position the tool where you want the feature (typically with
  G-code) and then call the sub.
  The first thing that the sub does is G92 the as-called position to
  zero, then it cuts the shape, then it clears the G92 offset.
 



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Re: [Emc-users] Retrofit Candidate Advice

[BRIAN GLACKIN]

Notice the comment

Starting bid is $500

CL usually popoos those.


On Tue, Jun 25, 2013 at 1:30 PM, Jon Elson el...@pico-systems.com wrote:

 Charles Steinkuehler wrote:
  -BEGIN PGP SIGNED MESSAGE-
  Hash: SHA1
 
  Besides my 3D printing endeavors, I am involved with trying to get a
  hackerspace going here in Topeka.  Recently a CNC mill that might make
  a good LinuxCNC retrofit candidate popped up on the local craigslist:
 
  http://kansascity.craigslist.org/tls/3892182813.html
 
  Can anyone advise if this looks like it would be a good candidate for
  conversion to LinuxCNC, and what I should watch out for if I actually
  go to inspect and/or buy it?
 
 Looks fairly good.  Appears it may have SEM motors, which are quite good.
 Appears to have 5 travel on the quill, which is a limitation, but same as
 a Bridgeport.  Lots of toolholders, which are more valuable than the
 mill.  If the ways and ballscrews are in good shape, grab it.  It would be
 good to see it under power, you can detect some problems by listening.

 Jon


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Re: [Emc-users] Easy 3D Re: Correct use of subroutines

[BRIAN GLACKIN]

Google got lucky.  Sold Sketch up to Trimble (so they can generate poorly
triangulated surveyed surfaces).  Microsoft just got to abandon their
product.


On Mon, May 13, 2013 at 7:29 PM, andy pugh bodge...@gmail.com wrote:

 On 13 May 2013 23:41, Gregg Eshelman g_ala...@yahoo.com wrote:

  The real problem (and it *is* a real problem) then becomes
  generating
  the model geometry. Based on a very small sample,
  non-techies have
  trouble with 3D modeling and fancier CAD programs aren't the
  answer...

 Autodesk Inventor Fusion is pretty slick, and you can't argue with the
 price.

 I actually miss all the control that I have with the fully parametric
 modeller that is in the full version of Inventor, but I can imagine
 that if you weren't coming from that background then you wouldn't miss
 it.

 The modeller in Maya is also fairly free-form. I think that Rhino is
 too, though I have never tried it.


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Re: [Emc-users] What's the opposite of a V groove wheel?

[BRIAN GLACKIN]

How about inline skate wheels inside and upturned piece of angle iron?
Perhaps even the real hard roller skate wheels ground to fit the groove?

Just me thinking on the cheap and low tech.

Brian


On Thu, May 9, 2013 at 4:08 PM, Gregg Eshelman g_ala...@yahoo.com wrote:

 --- On Thu, 5/9/13, Drew Rogge d...@dasrogges.com wrote:

  From: Drew Rogge d...@dasrogges.com
  Subject: Re: [Emc-users] What's the opposite of a V groove wheel?
  To: emc-users@lists.sourceforge.net
  Date: Thursday, May 9, 2013, 11:30 AM
  Depending on the width of the groove
  in the 4040, one of these might work:
 
 
 http://3d.grabercars.com/?product=11-delrin-roller-with-608-bearing-fits-1515-series-extrusion-from-8020-net-copy
  http://3d.grabercars.com/?product=universal-w-delrin-roller-with-bearing

 Never thought about the outer angles of a W roller fitting the groove.
 That simplifies things.


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Re: [Emc-users] OT - help identifying machine in a collage

[BRIAN GLACKIN]

Winch seems right.  The picture appears to be similar to the lifting
assembly used on cable system for hauling logs uphill.  Take a look at old
episodes of Axmen on History Channel.

If it is one of these, it is presently stood up on end.

B


On Fri, Apr 26, 2013 at 11:06 AM, Daniel Rogge dro...@tormach.com wrote:

 To follow up on this off-topic thread, my librarian friend contacted the
 curator of the museum and got the following response about the machine in
 this collage http://www.flickr.com/photos/60584010@N00/4304142095/



  Quoting Davor Kernel :
 
  Hello!
 
  About machine in the middle of collage of Černigoj:
 
  After the conviction of the Honorable colleague, dr. Vižintin
 (University of
  Ljubljana, Faculty of Mechanical Engineering), this is a portable winch,
  which can be used for lifting loads in the construction, forestry or
  elsewhere. The winch can have inner gearwheel or belt transmision.
 
  The picture: lower, brake shaft, that juts out, is prepared to fix
 somekind
  of winding up drum, small handle in the middle is used as a handle for
 hand
  or manual drive. Regarding to the year (1925), Černigoj probably wanted
 to
  show utility for the manipulation or supply of apartments in higher
 floors
  in the neighbourhood or even on the streets.
  I hope You will be content with my expalnation.
 
  Excuse me, if some technical terms are not so clear and understandable.
 
 
  Davor Kernel
 
  -Original Message-
  From: Anna Fulton []
  Sent: Thursday, April 11, 2013 11:12 PM
  To: Davor Kernel
  Subject: Re: question about August Cernigoj image
 
  Hello Davor -
 
  Yes, please.  Thank you very much for your time!  I've asked about 10
  engineers and all of them have given me drastically different guesses.
  This piece of art has definitely piqued our interested and we're
  interested to learn more about the collage!
 
  Anna Fulton
 
 
  On 4/11/2013 4:07 PM, Davor Kernel wrote:
  Hello!
 
  Thank You for Your question. If You want to give me few days, I will
  try to find an answer. I travel around Slovenia (work). When I will
  come back, I will send You an answer.
  About Cernigoj:
 
  He was faithful to Constructivism and its principles which became his
  main direction after he completed his studies in the renowned Bauhaus
  School in Weimar. His motives include figural representations, objects
  and pure abstract works.
 
  Cernigoj was also experimenting with different kind of machinery,
  especially in the period of the Constructivism (1923 - 1929), so it is
  not unusuall to see this kind of art works.
 
  With best wishes,
 
  Davor Kernel
 
 
  - Original Message - From: Anna Fulton
  To:  
  Sent: Thursday, April 11, 2013 7:19 PM
  Subject: question about August Cernigoj image
 
 
  Hello Mr. Kernel -
 
  My name is Anna Fulton and I am a librarian at the University of
  in the US.  I have an art student who is trying to identify
  a piece of machinery located in the center of Cernigoj's La Strada
  Collage from 1925. I have asked a number of engineers at the
  university and none of them can identify the piece.   Do you know
  what it is?  I have provided a link to the image.
 
  http://www.flickr.com/photos/60584010@N00/4304142095/
 
  Thank you for your help!
 
  Sincerely,
 
  Anna Fulton
 



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Re: [Emc-users] off topic opinions

[BRIAN GLACKIN]

I recall that there is one guy that set up a very well written blog/website
discussing his shop and the purchase, initial set up, and various uses of
his own 3 in 1 tool.

Perhaps someone here will recall the site I mention.  For the life of me I
cannot recall the website and its long lost to my computer changes over
time.

If you can find that site, you will find a very well written discussion of
the pros and cons of these units, an analysis of the various manufacturers,
how to prep and set up a new machine and how to use its various
capabilities.

I will keep searching for the link as well.

Brian
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Re: [Emc-users] convert g1s to g2/3s

[BRIAN GLACKIN]

G64 does this for you without changing the code.


See
http://www.linuxcnc.org/docs/html/gcode/gcode.html#sec:G64

for more details.
On Wed, Mar 27, 2013 at 6:17 PM, Frank Tkalcevic 
fr...@franksworkshop.com.au wrote:

 Does anyone know of a script that converts G1 line segments into G2/G3
 curves?  In the src tree I found author.py which has an implementation of
 the Douglas-Peucker simplification algorithm, but I can't see where it is
 used.  Is there a script anywhere that uses it?



 I want to use this to simplify the output of the 3d printer software
 Slic3r.
 It only generates line segments which slows down my router.  Most of my
 shapes have circle shapes, so it would be nice to use G2/G3.



 I've tried a trial version of a program I found on the 'net, but it didn't
 work because there are A axis moves on each line (A = extruder).



 Frank.


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Re: [Emc-users] convert g1s to g2/3s

[BRIAN GLACKIN]

But, as you say, my fundamental issue is losing the curve information when I

 convert my CAD models to STL.  This will go into the too hard basket for
 now - the waterline processing sounds interesting, but I'm put off by
 having
 to process a CAD file.

 Thanks,
 Frank


Frank

A few random of thoughts.

First off, I expect you will be doing some projects with significantly more
complexity than the washer which will require the full power of slicr (of
which I know little other than its a cad/cam solution for reprap stuff)
including the appropriate curvature tools.

Does Slicr offer any other outputs?  In the past few days I have been
playing with inkscape and if there are lines you can get into that, you can
recreate the curves and simplify them then export G2/G3 with Gcodetools.
Its a workaround, but it will get you there.  Also for simple circles, you
could hand code those pretty easy.  I started learning how the different
gcodes work by trialing them in the air and using the MIDI command screen
in axis.

Almost everything I cut (when I get a chance too) is waterline stuff.  With
simple parts, I have gotten pretty good creating the gcode for one layer by
hand then extending it downward using Owords.  It was actually a good
intellectual puzzle working it out.

not sure this helps you much, but some random thoughts

Brian
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Re: [Emc-users] potrace output to scalable gcode. Exists?

[BRIAN GLACKIN]

I was looking at Gcodetools for inkscape last night.

Its actively supported by Nick off the russian forums.  I was looking to
import an HPGL file to eps through inkscape and out with gcodetools.  I am
not there yet but moving along.

The wiki discusses gcodetools v1.2 .  Its already upto v1.7 making the wiki
out of date.  My plan is to figure it out then see what I can do about
updating the wiki.  Gotta figure it out first.

Brian

On Sat, Mar 23, 2013 at 7:33 PM, andy pugh bodge...@gmail.com wrote:

 On 23 March 2013 21:36, Gene Heskett ghesk...@wdtv.com wrote:
  I've fixed and potrace'd to an eps file that looks ok when imported into
  gimp, of the handle outline of the cocking piece in a BP rifle.  I was
  under the impression that we had something that could take this .eps file
  and make gcode out of it, but I'll be dipped if I can recall its name.

 Gcodetools in Inkscape?
 Possibly SheetCAM (and definitely SheetCAM if you can save the EPS as a
 DXF)

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Re: [Emc-users] A Chance to Exhibit at Cabin Fever

[BRIAN GLACKIN]

I don't have anything small to show but never miss a chance to get my boys
to hang out at the indoor pond.

Looking forward to seeing what you have to display.

Brian Glackin

On Sat, Mar 16, 2013 at 7:19 PM, Matt Shaver m...@mattshaver.com wrote:

 Just FYI, if you live near the East Coast or like to travel, the Cabin
 Fever Show in York, PA is coming up on the weekend of April 12-14, 2013:

 http://www.cabinfeverexpo.com/

 I was talking with Steve Stallings on the phone today, and he's been
 talking with the show promoters about expanding the CNC part of the
 show. The promoters have agreed to provide some tables with
 electricity nearby for CNC exhibits and there's no cost to exhibit
 other than the regular entry fee of $10.00 for all 3 days (Friday,
 Saturday, and Sunday).

 I'm going to exhibit some of the stuff I'm working on and if anyone
 else wants to do the same, why not reply to this post and reserve
 yourself a little space of your own! The Mach folks will be there, and
 we can't let them have all the fun :)

 Thanks,
 Matt


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Re: [Emc-users] Teleop soft limits

[BRIAN GLACKIN]

I have a gantry style homemade machine.  2 or so years ago I went about
trying out the gantrykins to correct skew.  After fiddling with it for
awhile, one poster here said that prior to messing with a software solution
for a hardware problem, I should first go about tuning the machine and
adding shims where possible to correct the shew as much as possible, only
then should I resort to the gantrykins fix.

Fortunately, I took that advice and spent the time (less than 2 hours) and
I fixed the skew and never had to resort to using the software solution.

Are you sure that you have done all that is practical (in both a time and
materials way) to correct the hardware issue first?

Just another way of considering the problem.

Brian

On Wed, Mar 6, 2013 at 5:16 PM, andy pugh bodge...@gmail.com wrote:

 On 6 March 2013 21:15, Henrik Munktell henrik.munkt...@gmail.com wrote:

  Looking at the gantrykins code, maybe I could adopt that code to include
  the mm/mm compensating factor. But does jogging in teleop with gantrykins
  obey the soft limits? (I have not tried it)

 No, gantrykins is another non-trivial kins. But I don't know why it is
 non-trivial.

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Re: [Emc-users] OT - CNC Workshop not to be hosted by Digital

[BRIAN GLACKIN]

I used to work in York several years back.  The main hall (Toyota Hall)  is
in the middle of a parking lot and is where the Cabin Fever events have
been.

https://maps.google.com/maps?hl=enie=UTF-8q=york+fairgrounds+map+pafb=1gl=ushq=york+fairgrounds+maphnear=0x882d80261e32e589:0xc24621475022b43d,Pennsylvaniacid=0,0,4213032501882045565ei=606AUIeNHKXm2QWwsYG4CAved=0CGoQ_BIwAA

But on the east side of the lot are a number of smaller buildings that are
nicely fitted out.  The company I worked for had our christmas parties in
them.  There are also two smaller buildings adjacent to the main expo
hall.  I have never been in them, but I beleive they can also be used for
events.

Here is a link to the controlling organization

http://www.yorkexpo.com/index.html

You can see the expo space they have available.  It would be nice if they
had a more complete map of the site that could be downloaded.

As to the gripes of getting there, From the west and south, PA can be
avoided altogether by coming to york either from Baltimore or from DC and
points west entering PA near Gettysburg.  If your coming from New England,
traffic is in your blood anyway so no foul there

B.
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Re: [Emc-users] OT - CNC Workshop not to be hosted by Digital Machinist next year

[BRIAN GLACKIN]

Joining up with cabin fever could be a good move. The vendors are
already there and there are numerous buildings at the fair grounds
that could be used for seminars away from the main event. Just a
thought.

On 10/17/12, Jon Elson el...@pico-systems.com wrote:
 Dave wrote:
 Did he give any reasons as to why?

 A lack of vendor involvement was part of it, but given the space WCC was
 making available, I don't see how more vendors could have really got in
 there.  This might have been a critical mass problem, WCC wouldn't
 offer a larger space unless we had more people, more vendors wouldn't show
 unless we had more people, more people wouldn't come without more
 vendors and speakers.

 But, also he said he was completely tied up from February to
 June with logistics.  I think maybe he could have pushed back on people who
 were demanding too much of his time, or maybe hired a part-time kid
 to just field calls for him.  I am fairly sure Roland didn't devote this
 much
 time to his meetings, but then he had something like 3 full-time employees
 that he dedicated for a month before the show.

 The building at WCC was great with all the small classrooms and one
 big lecture hall, but we needed a bigger space to put the vendors/
 exhibitors.

 Jon

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Re: [Emc-users] Router speed

[BRIAN GLACKIN]

I also have a wood router.  For me, I rarely if evver burn wood.  When that
happens either I am taking too large of a cut or my endmill is dull.
Granted I am a hobby user and I am mostlly limited to 1/8 and 1/4 endmills
and limiting DOC to the diameter of the endmill.  I use the P64 with a
small amount of P.  I will typically cut air trying out different amounts
of P to see what my speeds are on tight radi and hard corners.

http://wiki.linuxcnc.org/cgi-bin/wiki.pl?GcodeInfo

B

On Fri, Sep 21, 2012 at 7:58 AM, John Thornton bjt...@gmail.com wrote:

 This is a good chapter on trajectory planning.

 http://linuxcnc.org/docs/html/common/User_Concepts.html

 and perhaps in addition to the above your acceleration might be too low
 if your doing lots of small segments.

 John

 On 9/21/2012 6:32 AM, aaron moore wrote:
  Hi EMC
I have a router running emc. Feed speed is good on straightlines,
 however curves and circles are often slow and tend to burn the wood. Can
 anyone explain how I can improve this.
Thanks in advance
Aaron
 
  Re-Form Furniture
Aaron Moore
Conileigh
Skinners Bottom
Redruth
Cornwall
TR16 5DY
 
Tel: 01209 890084
Mob: 07805686188
Email:aaronmo...@linuxmail.org
Web: www.re-formfurniture.co.uk
 
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Re: [Emc-users] Counting and saving to file

[BRIAN GLACKIN]

 snip



 We agreed that saving to a file will be done, when operator
 explicitly presses save button. So they are taking a risk that
 powerfailure will cause a loss of unsaved data. I just cannot figure
 out, how to create a reminder for operator to save data in case he/she
 is trying to close application with some unsaved numbers.
 snip


Cogoman's suggestion is the best here.

Do a file open, append line of data, file close with each reading.
THis is a trivial activity for the computer.

Then to satisfy the customer, have the save button copy the contents of
this Shift file to a final file.

That way, if there is a power failure (and the operator has not hit the
save button for 4 hours) and the customer calls you, you can tell them to
look for this shift file to get the data they thought long gone.

DUring a machine startup and or shut down, you can have the contents of the
file saved to the daily file then purge the shift file.

Brian
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Re: [Emc-users] Limestone cnc

[BRIAN GLACKIN]

You can also use a metal stencil affixed to the stone with rubber cement.
The stencil should last several goes before being too thin for another
round.

One other option would be to use a routing style tool to work the outline
of the lettering, then use an air needler to remove the stone face in the
large areas surrounding the lettering.

On Tue, Sep 4, 2012 at 7:44 AM, Erik Friesen e...@aercon.net wrote:

 Thanks all.  Seems to me that perhaps it would be easier to cut rubber with
 cnc than stone.  I haven't found a place yet that sells it outright though.


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Re: [Emc-users] rapid prototype

[BRIAN GLACKIN]

This summer's Digital Machinist magazine has an article by Dave Mauch on
both retrofitting an existing 3 axis machine and the software to slice and
dice models into gcode.  Just recived a free copy in the mail last week.

On Mon, Jul 23, 2012 at 9:50 AM, Florian Rist fr...@fs.tum.de wrote:

 Hi Aram

  Problem is in how from 3d surface/solid model generate G M code program
  to move axis and govern the head?

 That's no problem at all, Skineforge doese exactly that:

http://fabmetheus.crsndoo.com/wiki/index.php/Skeinforge


 See you
 Flo


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Re: [Emc-users] [Off] Ballscrew Support?

[BRIAN GLACKIN]

For long machines where the cutting forces are not hugely significant (such
as a wood router) could one not used a aircraft cable setup? The cable
could then be run over a motorized pulley.

Something I always thought of but haven't fleshed it out further.

Brian
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Re: [Emc-users] Plasma

[BRIAN GLACKIN]

I am a bit baffled.

Why would you add milling capacity to a plasma table (other than to say you
can do it)?  My impression of a plasma table is a basic gantry with minimal
mass.  The only resistance in the system is your slides of whatever
variation you use.  By adding milling, even with a snall router, you are
adding both mass and cutter resistance.  This significantly increases the
overall mass of the gantry and the size of the components (servos, drives,
etc) required to operate.

Since your only looking to have a small milling area, why not just build
the plasma machine, then use it to cut our parts for a smaller (and more
robust) milling gantry.  Per haps sized so that it will sit on or in the
plasma table when they are not in use.

B
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Re: [Emc-users] Plasma

[BRIAN GLACKIN]

 I don't have a downdraft table but I assume you will have to move huge
 amounts of air to capture the dust from the plasma. Quite a bit of the
 dust flies up from the cut point so to be efficient the table will need
 to be completely enclosed to capture the dust. The amount of dust
 depends on the material condition as well. It seems to me that the more
 rust, crap, and dirt on the plate the more dust I see.

 I recall reading someones build blog where they immersrsed the metal
roughly 50 mm or so below the water.  The plasma would hold the water back
during operation and the intimate water contact kept the dust to a complete
minimum.  I cannot recall who did that though

Brian
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Re: [Emc-users] cylindrical coordinate kinematics

[BRIAN GLACKIN]

 snip



 Velocity is going to be a problem I see.  You go through a singularity
 at zero radius, and the angular velocity must continuously vary to maintain
 constant linear velocity.

 snip


Rather than radius mode, can you set it up for diameter?  Your base speed
is whatever you want as a maximum over the centerpoint, then modify the
speed by a factor (factor approaches 1.0) as it reaches the singularity
point.  I cannot think of the specific math to do this at the moment as I
want to get out of the ofice and enjoy the weekend.

Brian
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Re: [Emc-users] Encoder Redundancy?

[BRIAN GLACKIN]

As I am used to saying and hearing

Strive for perfection, but done beats perfect
B
On Thu, May 24, 2012 at 1:31 PM, Kent A. Reed kentallanr...@gmail.comwrote:

 On 5/24/2012 1:13 PM, Jon Elson wrote:
  Well, not really elegant, but I think it would work, and not require
 months
  of firmware design.
 That makes it elegant, at least in my world where the perfect is not
 allowed to be the enemy of the good.

 Regards,
 Kent




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Re: [Emc-users] OT-Retrofitting machines

[BRIAN GLACKIN]

I have seen recently a local machine shop throw away an Index Vertical
Mill with a dead control for $300 on Craigslist.  I was the second
caller  THe mill was identical to one sold on government liqudators for
$2,500 several months ago with a speared control cabinet.

According to the half owner, the unit was in excellent condition but they
just couldn't figure out how to deal with the constantly dyingg control.

IMHO, many machine shop owners with older CNC setups just don't take the
time to learn the electronics and keep up in developments that might aid
thier cause.  Its thier capital they are eventually giving to another for
pennies on the dollar.

B
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Re: [Emc-users] OT-Retrofitting machines

[BRIAN GLACKIN]

 snip



 I think this has a lot to do with a focus on production and not on the
 techie side.

 Dave



I can appreciate this.  Unfortunately, this can be a blind side for the
business.  The gentleman I spoke with that had the unit said they had not
run it in three years and rather than do something to fix it, the worked
around it literally.  THe reason they were getting rid of it now so cheap
was it was collecting crap from one of the other workstations and
obstructing the redirected workflows.

There has to be a balance between production and techie sides. Imagine if
the business invested 2% of its time in techie stuff  That unit and
probably others would be up and in production since they developed the
inhouse knowledge (and valued it).

Just my own rant

B
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Re: [Emc-users] Behavior of Touch-Off Dialog (and Tool Table Editor?)

[BRIAN GLACKIN]

 snip

 I think current value and zero are the two initial values that make
 the most sense, but I don't know which one is useful MORE of the time.
 I suspect this is a matter of opinion and/or practice and opinion
 will be split.

 snip

Perhaps the desired behavior can be triggered by the INI file.  That way
someone setting up a Lathe would have it one way and a mill another.

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Re: [Emc-users] Behavior of Touch-Off Dialog

[BRIAN GLACKIN]

 snip
  John
 There is an echo in here. Maybe John and I are alone, but I think far fewer
 homing and touch off mistakes, where a previously established setting was
 in-advertantly foobared, is caused by the auto coupling between the last
 axis moved and these two functions.  I have destroyed my Z hundreds of
 times while trying to fine tune the X.  After a while, it becomes quite an
 irritant for me.

 snip


THis certainly has bitten me numerous times, but usually foobaring the X
axis when I am fiddling with the Z.  Nothing like moving the X touchoff 15
inches instead of the Z 0.015in during a series of sequential program cuts.
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[Emc-users] Open Hardware Summit

[BRIAN GLACKIN]

http://summit.oshwa.org/call/

Something that I saw pop up on one of the other lists I lurk on.  One of
the topics certainly looks to possibly fit in with one of the current hot
discussions (cad/cam).

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Re: [Emc-users] Parallel Ports, EPP, and Mesa 7I43

[BRIAN GLACKIN]

Peter,

Can you detail the difference in the example and the controller's
capabilities?  Are these two sentences the same thing?

snip

   the comments in the HAL setup for a 7I43 indicate:
 
  quote configs/hm2-stepper/7i43-small.ini
  # Step timing is 40 us steplen + 40 us stepspace
  # That gives 80 us step period = 12.5 KHz step freq
  #
  # Bah, even software stepping can handle that, hm2 doesnt buy you much
  with
  # such slow steppers.
  #
  /quote


snip

Your response...


  Because the example file is a real example file for a specific step
 drive that
 just happens to have those timings

 The actual hardware limitation on steprate is ClockLow/4 (for a 7I43 this
 is
 50 MHz/4 = 12.5 MHz)


What is the difference?  I am confused.  Is it that his step period is so
long that the performance is poor?

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Re: [Emc-users] Subject change: Linux vs Turbocnc

[BRIAN GLACKIN]

On Fri, Mar 9, 2012 at 7:21 AM, Viesturs Lācis viesturs.la...@gmail.comwrote:

 2012/3/9 charles green xxzzb...@yahoo.com:
  the fanuc machines are at work.  no desire to port them anywhere, just
 replicate the solid controller functionality for my own fun.

 Since that would provide a benefit to Your employer, it seems obvious
 to me that they should pay for that.


I do not have the same starting point since I have no previous expereince
with milling and or CNC, but it appears obvious to me after lurking in this
mailing list for 5 years + now, that LinuxCNC is a solid controller not
only for the home user but for many production shops as well.



 
  what is f6 noapic?
 

 During boot-up, press F6, some menu opens and noapic option is
 selected (at least that is how I understand it, I myself have never
 done that).

 Viesturs


As Viesturs mentioned, using the Livecd, at the opening splash screen,
there is a series of F# options with F6 allowing you to add or change the
startup command line.  Hit F6 and scroll to the end of the line and add
-noapic.  It helps with older systems - why? I haven't the foggiest but it
seems to smooth my installation efforts on these older compaqs.

Brian
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[Emc-users] Subject change: Linux vs Turbocnc

[BRIAN GLACKIN]

Changed Subject since the thread split from the original question.

From my own personal experience (hobbyist side), I found that Linuxcnc fit
the bill for me.

Why?

1. I had old computers (with blanked hard drives) lying around and did not
want to buy an OS to get operational.
2. I looked at TurboCNC and considered using freedos, but figured that
there was little to benefit me by expanding my knowledge of DOS (kinda like
learning latin - It helps some, but noone uses it any more)
3. I knew nothing about Linux and figured that it would benefit me to learn
how to use it at the same time I was learning CNC and software
4. LinuxCNC is actively supported and I found people willing to guide (and
more importantly TEACH) me how to use both Linux and LinuxCNC.

I use a 15 year old desktop (Compaq deskpro).  I ran into problems trying
to laod the CD initially but after learning the F6 - NOAPIC trick, have
successfully loaded Linux and LinuxCNC on 4-5 machines.

If your using Fanuc machines, why would you want to port them to TurboCNC?




On Thu, Mar 8, 2012 at 9:56 AM, charles green xxzzb...@yahoo.com wrote:

 that is certain to require a fresh clock battery and some floppy drive
 cleaning.  and $60?  does shareware run without registration fees?


 --- On Thu, 3/8/12, Mark Wendt mark.we...@nrl.navy.mil wrote:

  From: Mark Wendt mark.we...@nrl.navy.mil
  Subject: Re: [Emc-users] EMC2/Ubuntu updates - safe to install?
  To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
 
  Date: Thursday, March 8, 2012, 6:01 AM
   On 03/08/2012 08:55 AM, charles green
  wrote:
   It's true if all you want is a machine controller
  and
   nothing else.
  
   so, again, strictly in the capacity of a machine
  controller, turbo cnc vs linuxcnc, the comparison and
  contrast results are what?  have you a basis for
  comparison?  do not limit your scrutiny of the finest
  details.
  
  Again, who cares?  I have no use for a single-minded
  system like that.
  Since you're the proponent for machine control only, try it
  out yourself
  and make that determination.
 
  Mark
 
 
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Re: [Emc-users] Film Emulsion for Encoder Wheels?

[BRIAN GLACKIN]

One surprisingly goog utility I use for stitching photos together is M$
Image Compositing Editor (ICE).  Yes it is Microsoft and winders based, but
at least the distribute it freely and I have to use Winders for work.  I
use it all the time to composite photo images of the numerous quarries I
visit.  Have not played around with any linux based ones (yet)
Brian


On Mon, Feb 27, 2012 at 12:00 AM, gene heskett ghesk...@wdtv.com wrote:

 On Sunday, February 26, 2012 11:08:20 PM charles green did opine:

  take lots of lower quality pics, crop for the good parts, and stitch
  together.

 There is supposedly a utility to facilitate that Charles, but the one time
 I tried it, it was rather soundly defeated by the lack of true imaging by
 the lens of my then $500 Olympus camera, which until then I was not aware
 that it had _any_ barrel or pincushion distortion.  That camera was a
 really bad battery hog although its color was excellent and has been
 replaced by a Nikon L100 Coolpix which has very obvious amounts of barrel
 distortion and poorer color, so I haven't even tried to locate and build it
 again.  Maybe it has gotten smart enough to adjust for those distortions in
 the meantime.  ISTR it was called Hugin or something similar sounding.
 Yeah, pclos calls hugin the 'panorama tools' gui.  And that pulled in 6
 other packages worth of dependencies.  So I loaded up two pix of the
 kitchen cabinets I did new door panels for a couple years back and told it
 to merge them, which it did, but the result was very severely distorted
 because the camera was aimed uphill about 10 degrees, and 95% of the
 resolution of the images was lost in blending artifacts.  Now if I could
 precorrect for that tilt by essentially telling it the film was vertical
 and that the lens was slid upwards a bit applied as predistortions to
 correct that camera tilt, maybe I might get something usable.  Worth my
 time?  Not really until I have material worth fooling with, probably by
 tripod mounting the camera on a precisely leveled head and shooting a pix
 about every 20 degrees of turning the camera.  I do think its more mature
 than when I last tried it though.  At least the barrel distortion, about
 10% in that Nikon lens I expected a heck of a lot better from, didn't make
 it upchuck and complain.

 But it did throw an error and quit, some dependency it needed and didn't
 pull in when I attempted to change something and re-run it.

 Something to play with in warmer weather I believe, when I get near the
 bottom of the bucket and honeydo lists.  :)  Like that will happen soon, I
 need to put a hitch on the Toy so I can pull my trash trailer, and a fresh
 engine in my GMC, probably also hauled in said trailer once I hit the
 landfill with whats in it now, by getting something bigger than my lawn
 mower to pull it with rigged.

 [...]

 Thanks Charles.

 Cheers, Gene
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Re: [Emc-users] OT-bandsaw

[BRIAN GLACKIN]

snip

There is a 4X6 bandsaw group on Yahoo Groups that specializes in tweaking
maintaining and improving the cheap import bandsaws.  They have a very good
tuneup guide in the files which will walk you through all the maintenance
adjustments and upgrades to get your saw back in service.
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Re: [Emc-users] New dialects [Was: Do CAM instead? ]

[BRIAN GLACKIN]

One question, from someone who hasn't used CAM. The CAM package would
provide a way to specify the number of tool passes, to reach the final
depth of a machining operation?

I recently went away from redundant gcode lines with the added tool paths
for each z
by passing a file with the xy cut to a subroutine that parsed through the z
depths.  I pass to the subroutine; filename, final z, and z increment.

This means I generate more files with the single toolpath, but it is
infintely more readable to me.

Brian
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Re: [Emc-users] New dialects [Was: Do CAM instead? ]

[BRIAN GLACKIN]

Yes, much more readable. The downside is that you can't do a restart at

 line without specifying which iteration of the outer loop to restart
 from. And neither the GUIs nor the runtime support that.


For me, I simply go back to the oword call and  rerun the particular
string.  I am a hobbyist so its ok for it to cut air for several passes
until it gets back to the particular Z depth where it was stopped.

Brian
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Re: [Emc-users] OT: Possible Retrofit candidate for someone in the heartland

[BRIAN GLACKIN]

Went for $2555.  People spend more on a card game...  or kids...

On Wed, Jan 25, 2012 at 2:20 AM, Dave e...@dc9.tzo.com wrote:

 On 1/25/2012 12:31 AM, Stuart Stevenson wrote:
  since I am about 5 miles from the base a second trip would not be a
 
  problem - if I forgot some paperwork
 
 
 

 That is extremely convenient.  :-)

 The last two base visits I had the GL guy met me at the gate and I
 followed his car back to the pickup location.

 No problem.

 Dave


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Re: [Emc-users] Passing file names into a subroutine

[BRIAN GLACKIN]

THanks Michael and Dwey,

I think I failed to properly code the individual part files and that is the
probable error.  I will pluck away at it this evening and try again.

Kurt,

While that is one option, I am usually cutting out of a sheet of wood.  I
have a higher level routine that I pass the upper left coordinates of the
part then use that with a G92/G92.1   This allows me to try a couple of
placements simply by changing the coordinate positions in the call.

Thanks all for your help.

Brian

On Wed, Feb 1, 2012 at 11:35 AM, Kirk Wallace
kwall...@wallacecompany.comwrote:

 On Wed, 2012-02-01 at 10:01 -0500, BRIAN GLACKIN wrote:
 ... snip
  What I would like avoid constantly cutting and pasting code (or
  filenames) into my parts program subroutine. I thought I could send via
  the subroutine a fourth value with the file name.  The thought being
 that I
  can have a series of calls for different parts that I can cut out from
 the
  same sheet without having to mash up a massive gcode file.
 ... snip

 Why not write a g-code file for each part, then write a shell script
 batch file to execute the files in order?
 --
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 http://www.wallacecompany.com/machine_shop/
 http://www.wallacecompany.com/E45/index.html
 California, USA



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Re: [Emc-users] Passing file names into a subroutine

[BRIAN GLACKIN]

 You can pass a numeric argument. Then:
 O#4 call ...


Here is where I made a grammar error - I typed
o#4 call   [var1][var2]  instead

Got rid of the  and it passed this point of the code.  The second error
is I failed to put o1 sub and o1 endsub around my code.


BTW: That's another place where it would be nice to have variables with
 string values.


Guess thats a reason to upgrade to 2.5

 Still running 2.4.6 here.

I still have a few bugs in the while loop that increments the Z axis for
each successive pass.  I sent Linuxcnc into a infinte loop trying to load a
malformed routine.   Time to brush up on my logic statements.

Thanks all for your help.

Brian
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[Emc-users] OT: Possible Retrofit candidate for someone in the heartland

[BRIAN GLACKIN]

Kansas is just too far for me.

http://www.govliquidation.com/auction/view?auctionId=4975994

Looks like the were a litte agressive on the control system with the
forklift.
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Re: [Emc-users] OT - Die Grinder Collets

[BRIAN GLACKIN]

 snip

 You are working with a bigger gantry I assume?

 Yep, I have a 25 X 49 X 4 work envelop.  I rarely use more than 3/4
vertical.  If I ever waterline mill out some of the terrain models of mines
I am involved with the design of, then I will use the full Z and still want
more.


  My biggest problem is with the collet slipping after my first cuts.  I
  need to make sure I always snug up the collet after the few minutes of
  starting the router.

 I fight with that on this HF die grinder continuously when its in use.  A
 .250 by 1.25 long 2 flute upcut spiral, TiN coated mill will walk out of
 that collet about 5 thou for every tenon I cut on the end of a poplar
 stick.  I solved the tenon length problem by parking the head back at
 z=0.000, and run the stick up against the end of the bit, with all the
 sticks precut to the exact length + 2X tenon length.  But I still need to
 reset the mill in the collet about every 10 sticks processed, 20 tenons
 IOW.  That run was for about 48 sticks plus 5 or 6 spares in case I didn't
 like where that knot was. :)

 And that is when tightening that collet, with a film of never-sieze on the
 collets ramps, with a box end wrench about 9 long, to the proverbial 1/8th
 turn from stripped out tight.  IMO that collet needs a full redesign to use
 sleeves with tapered ends and a cone in the shaft with a matching one on
 the nut.  As is, the angle of the ramp used to tighten it against the bit
 shank is too high.  Because the collet is one piece, there is no stuck bit
 syndrome because loosening the collet turns it in the ramp  the bit falls
 out by the time its loosened 1/8 turn.

How much meat are you cutting off the stick with each pass?  I find that if
I limit my cut depth to 50% of the endmill diameter, I my collet stays put
for several sessions.  If I try deeper cuts, it walks out.

I recently tweaked my O word file so that I only need to give it the XY
path of the part/shape I cut out and my endmill diamter and the subroutine
repeats the path at the .5D depth until it reaches the target depth.  Make
generating my gcode much simpler.



 I've looked at a lot of routers without finding one that had a truly
 straight, no runout collet.  Hitachi's M12V, way too big for this, has the
 best collets ever.

 I have pulled appart the one die grinder I have and replaced the
bearings.  The spindle is quite simple and could easily be replaced with a
more efficient design.  Again that requires me to come up to speed on how
to use one of the 5 lathes I picked up off craigslist for less than scrap
prices.  I keep telling myself I WILL learn how to use one of them, looking
for a rountuit to spend on that learning cycle.


  I have considered the colt trim router but I love the fact that I do not
  have all that cooling air flushing over the cut surfaces.  The PC router
  I originally used threw dust all over my garage to the point I couldn't
  stay in the room. THe die grinder along with a cyclone in line with my
  shop vac has eliminated dust even when cutting MDF.  I will still get
  bigger chips on the surface but they are not dust

 Yeah, that Oneida 'Dust Deputy' is the slickest thing since bottled beer.
 But my shopvac is almost too much flow, heavier stuff tends to just sit
 there and spin till the power goes off.  I got one about a year ago,
 several of those 5 gallon cans of trash has been dumped, I can still see
 the bottom of the tub in a 12.5 gallon shopvac, and I only pulled its
 filter ($30) once to clean it up when I put the DD on it.  Best $80 I ever
 spent!  Its usually plugged into the back of my table saw, controlled by
 one of those gizmos that turns it on  off with the saw.


Yep, I got the same one.  I considered making one of the cyclones using
Bill Pentz calculator, but I just don't have that time right now.  The
purchase has been worth every penny.  Especially when my basement flooded
this past fall and I had roughly 1500 gallons to clean up.  Using that
cyclone, I sucked up over 300 - 5 gallon buckets of water from the basement
in less than 3 hours.  My wife ran the vac hose, I flip flopped the cyclone
between 2 5 gallon buckets  and alternately dumped the full bucket into a
larger container holding a sump pump.  Having a 100 year old house has its
challenges.

Brian
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Re: [Emc-users] New thread, visolate

[BRIAN GLACKIN]

 are pure crap with horrible run outs.  Does anyone know of a source for
 .125 collects for the HF die grinder?  Hopefully that run truer than their
 1/4 supplied collect?


Let me know if you find a source.  I gave a burned out grinder to a machine
shop locally that advertised no job too small and asked him to machine a
half dozen replacement collets to fit the 0.125 endmill I am using.  That
was before Christmas and I have yet to hear back from him.  I would do it
as a turning project, but seeing I have yet to understand lathe basics, it
is a bit beyond me for now.

In the meantime, I use the 0.25 X 0.125 brass collet inserts sold by
Stewart Macdonald for ~$12 each.

Brian
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Re: [Emc-users] OT - Die Grinder Collets

[BRIAN GLACKIN]

Ouch.  Plays heck with my SS check.  How is the run out on those?  I have
 measured above 20 thou if I just shove it in and tighten, and when dealing
 with solid carbide wood router bits I have been able to turn those in the
 collect and usually get it down around 5 thou.  Still way too sloppy but it
 carves mortise and tenon joints in wood ok.  Using similar mills from
 Hemly, not much can be gained to rotating them in the collet.


Gene,

I am primarily cutting MDF and plywood (2d) with a 1/8th carbide endmill,
so I am rarely worried about the runout.  Plus I would need to buy an
indicator to figure it out.  I have cut steel screw heads (by accident) and
I get a surprisingly smooth surface.   Most of the time, I am happy if I
get the cut code right.  My largest runs have been christmas ornament
blanks for the kids and cub scouts to paint.

My biggest problem is with the collet slipping after my first cuts.  I need
to make sure I always snug up the collet after the few minutes of starting
the router.

I have considered the colt trim router but I love the fact that I do not
have all that cooling air flushing over the cut surfaces.  The PC router I
originally used threw dust all over my garage to the point I couldn't stay
in the room. THe die grinder along with a cyclone in line with my shop vac
has eliminated dust even when cutting MDF.  I will still get bigger chips
on the surface but they are not dust

Brian
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Re: [Emc-users] Odd behavior with Oword file calls

[BRIAN GLACKIN]

On Sat, Dec 24, 2011 at 6:55 AM, John Thornton bjt...@gmail.com wrote:

 I've added some info into the 2.5 manual about calling files and that
 the names are case sensitive.

 John


I already figured out the case sensitive issue out.

When I run the program, it will run the first toolpath of the cut (at zero
height) but that is where it stalls.  THis tells me I am past the case
sensitive issue.  When I run the program with the  square file, it
generates all the toolpaths down to -0.75 in 0.125 increments

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[Emc-users] Calling a part file from another file

[BRIAN GLACKIN]

Several years ago, Jeff Epler shared a O word routine for generating
multiples of a single part.The link is here.

http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Oword#Sample_5_Subroutine_for_generating_multiple_parts_using_Local_and_Global_coordinates

I routinely use this to make Xmas ornaments each year.Adding the gcode
to the program is fairly straightforward, but some of the cuts I have been
making contain 100-200 lines of code.  Rather than cutting and pasting, I
was hoping to call a file using the directions found here:

http://linuxcnc.org/docs/2.3/html/gcode_main.html#r3_7

I have a couple of questions.

1.  Can I call a file of gcode inside the oword subroutines?

2. If yes, what is the proper syntax.  I have tried several variations but
I get a blank screen.

ofile_partcode sub

ofile_partcode endsub

Any help or suggestions appreciated.

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Re: [Emc-users] Calling a part file from another file

[BRIAN GLACKIN]

On Fri, Dec 23, 2011 at 4:15 PM, andy pugh bodge...@gmail.com wrote:

 On 23 December 2011 20:13, BRIAN GLACKIN glackin.br...@gmail.com wrote:

  2. If yes, what is the proper syntax.

 What you end up calling is a subroutine inside a file of the same name.


This is the point I did not understand!  I think I have it now.  I was
calling the file name and did not have a subroutine defined inside the
file.  I just had the raw gcode and not the sub / endsub wrapping it.

Thanks for the help Andy.

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[Emc-users] Odd behavior with Oword file calls

[BRIAN GLACKIN]

I have been working to add the ability of using part files that are called
from a part production program.

The NGC file I am using is found here

http://pastebin.com/3mB7Ma9c

When Line 19 calls osquare  (square.ngc found here
http://pastebin.com/QDfNDmek)  THe routine generates 2 parts with cuts down
to 0.75

If line 19 calls 0b_5in_3 (b_5in_3.ngc found here
http://pastebin.com/pvuYzZCN) the file will abort loading with an error
message telling me I have an unknown o command around line 81.

I was originally able to generate the parts when I cut and pasted in the
code.  When I used the file call, this error occurred which prompted me to
create the square.ngc file as a simpler test.  Since square.ngc works, I am
completely baffled by the error.  If anyone can take a quick look at this,
I would be most appreciative.

Brian
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Re: [Emc-users] Very neat idea of controlling the Z-level

[BRIAN GLACKIN]

I am not good with programming, but I work with surfaces in mining
applications all the time.

Why not create an XY grid of the z surface and then load that into EMC much
like one loads in a map for backlash.  The grid can be created with as few
as three points or as many as the operator desires.  One would only have to
create a probing routine for the surface.  It could be a manual to get your
minimum 3 points or automated doing as fine a grid as one wants.

The planner can then adjust the moves based upon  the map.

of course I have no idea how hard or easy this would be to program and or
incoorporate into EMC so I will not retreat back to lurkdom.

Brian.
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Re: [Emc-users] 3d PDFs was Re: Engaver Tool Changing

[BRIAN GLACKIN]

On Mon, Nov 28, 2011 at 7:12 PM, andy pugh bodge...@gmail.com wrote:

 On 28 November 2011 23:45, Fox Mulder quakem...@gmx.net wrote:

  With current browsers suporting WebGL it is quite easy to embedd a X3D
  model into a web site without any need for an extra plugin. I tried this
  myself some time ago and it worked very good.


 Using Firefox 3.6.17 I got all kinds of security alerts about nontrusted
sites etc...
Once I excepted through those, I got a 3XDOM not supported by my browser
notice.  Hmmm... perhaps I have an old browser version...
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Re: [Emc-users] Engaver Tool Changing

[BRIAN GLACKIN]

On Sun, Nov 27, 2011 at 7:23 PM, George Lawrence Storm 
keencoy...@earthlink.net wrote:

  How about direct links?
  http://www.bodgesoc.org/HS_Spindle.pdf
  http://www.bodgesoc.org/HS_Spindle2.pdf
  http://www.bodgesoc.org/HS_Spindle3.pdf

 All three of the links lead to blank pages.


For me, Using Firefox, each link resulted in a download of the specific jpg.


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Re: [Emc-users] OT: Concrete Lathe

[BRIAN GLACKIN]

THere is also an extensive set on threads on CNCzone for building a Epoxy
granite mill.  I gave up trying to follow that thread 2 years ago.  They
may have a readers digest version of it somewhere now..
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Re: [Emc-users] OT: Concrete Lathe

[BRIAN GLACKIN]

On Sat, Nov 12, 2011 at 7:57 PM, Mark Cason farmerboy1...@yahoo.com wrote:

 On 11/12/2011 05:57 PM, andy pugh wrote:
  On 12 November 2011 23:21, Jack Coatsj...@coats.org  wrote:
  There is a yahoo group re-developing making a lathe from concrete.
  They are baseing their stuff on a guy that made lathes for turning
  large projectiles for the Navy.
  This appears to be that yahoo group, and that lathe.


Search on Yoemans Lathe  for the early concrete lathe described above.

The Yahoo group Multimachine has a very active thread on developing a
smaller version of the original behemoths.

Brian
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Re: [Emc-users] Engaver Tool Changing - an OT question

[BRIAN GLACKIN]

 .snip.


 It's very noisy.


The reason I went with the HF die grider was the shear weight of the
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Re: [Emc-users] Engaver Tool Changing - an OT question

[BRIAN GLACKIN]

On Mon, Nov 7, 2011 at 9:15 PM, BRIAN GLACKIN glackin.br...@gmail.comwrote:

  .snip.


 It's very noisy.


 The reason I went with the HF die grider was the shear weight of the


G - fingers hitting wrong keys

My reason was the DG was soo much lighter reducing the gantry mass and the
minimum amount of cooling air used by the grinder (minimizes dust
dispersion).  My die grinder was also soo much quieter than the router.  I
don't know how that compares with the Bosch DG.

Brian
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Re: [Emc-users] nothing to do with emc

[BRIAN GLACKIN]

I have used 1/4 X 1/8 collet adapters with good success.  I cannot recall
the supplier, but they are one of the companies that specializes in
supplies woodworking tools to instrument makers - Stewart perhaps?

Brian

On Tue, Nov 1, 2011 at 4:35 PM, kqt4a...@comcast.net wrote:

 I know this has nothing to do with emc but you people represent centuries
 of experience
 How's that for kissing up :)
 I see lots of these 1/2 to 1/4 adapters

 http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/router_collet.html
 but what about one for 1/4 router and 1/8 bits
 I have one of the little cheap ones with a set screw but the bit is a
 little loose

 Richard


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Re: [Emc-users] nothing to do with emc

[BRIAN GLACKIN]

One thing to consider is that the power to cut with a 1/8 endmill is
dramatically less than needed for a 1/4 and 1/2 inch endmill.  Why not
consider swapping out your router with a decent electric long shaft die
grinder - they give the collet size and the extension.  Milwalkee and Bosch
both make one although pricer than HF's 24.99 specials.

here is a link to a Bosch model.

http://www.shopwiki.com/_Bosch-Electric-Die-Grinder-%28AC-/-DC%29?o=170766557s=21453

Brian



On Tue, Nov 1, 2011 at 5:34 PM, kqt4a...@comcast.net wrote:

 On Tue, 1 Nov 2011, BRIAN GLACKIN wrote:

  I have used 1/4 X 1/8 collet adapters with good success.  I cannot recall
  the supplier, but they are one of the companies that specializes in
  supplies woodworking tools to instrument makers - Stewart perhaps?
 
  Brian
 
  On Tue, Nov 1, 2011 at 4:35 PM, kqt4a...@comcast.net wrote:
 
  I know this has nothing to do with emc but you people represent
 centuries
  of experience
  How's that for kissing up :)
  I see lots of these 1/2 to 1/4 adapters
 
 
 http://www.mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/router_collet.html
  but what about one for 1/4 router and 1/8 bits
  I have one of the little cheap ones with a set screw but the bit is a
  little loose
 
  Richard


 A collet adapter will not help
 I need the extra length also


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Re: [Emc-users] Spindle motor

[BRIAN GLACKIN]

When using a router as a spindle, there are several things to consider.

First, the routers are air cooled.  This means if you run the router at
lower speeds, you have to watch for overheating.  Secondly, the airflow is
directed from the top of the router down towards the work.  This means it
will nicely blow the chips away from your cutting tool, but will also
dramatically increase the volume of dust colletion you need to control the
dust that will otherwise coat everything in your shop.  On my gantry I went
with a long shaft die grinder ($24.00 from harbor freight).  The spindle is
not the most accurate but plenty good for my needs.   THe long shaft
provides a nice mounting area and keeps the motor away from the work.  In
addition, the cooling air for the motors is not directed at the cutting
area making it easy to control dust from the operation.

For better quality long shaft die grinders, you might check out the bosch
or similar units.  They come with collets down to 1/8 (cannot recall the
metric equivalent).

HTHs.

Brian
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Re: [Emc-users] Emc-users Digest, Vol 65, Issue 67

[BRIAN GLACKIN]

On Thu, Sep 29, 2011 at 11:59 PM, Martin Patton mart...@gmail.com wrote:

 
  Brian,
 
 I will do as you suggest and cut a grid.  What did you adjust in the ini
 file?
 Thanks,
 Marty



 I cannot recall the exact items to adjust since it was over two years ago
 since I made the correction.  You will most likely not be able to use
 stepconf to make the adjustment.  You will need to hand edit the file (not a
 big deal).  I believe its the scale parameter.  Others will correct me if I
 got this wrong.  The integrator's manual has details on making the accurate
 calculation.

 You mentioned that you are using 20tpi rods.  Are these just standard
 threaded rods?  If so, that could be the source of the error.  Getting the
 expected versus actual position and calculating the scale needed.  By doing
 the grid you will find out if the error is in both axes (most likely) or
 not.  By doing a number of points, you will find if the error is linear (tpi
 is slightly off, say 19.95 tpi - likely) or variable (threaded/acme rods are
 not uniform across length - unlikely).

 Brian

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Re: [Emc-users] calibrating stepper motor cnc

[BRIAN GLACKIN]

One recommendation is to put a Vee cutter in your spindle and run a program
where the Vee bit just touches the material in a uniform grid pattern.  Take
your part and measure all the positions from the 0,0.  You may have your
machine set up in such a manner that it is not just perfect.  When I did
this, I ended up adjusting the ini file slightly to correct for a 1/8
undershot over my 4' X axis and 1/16 on my 2' Y axis.

On Thu, Sep 29, 2011 at 1:10 AM, Martin Patton mart...@gmail.com wrote:

 Hi EMC users,
 I have EMC running on an old pc, latency number about 25000.   I got an
 occasional real time error with latency number set at 22000.
  I drew a part in CamBam, generated some g-code and cut a part.  The part
 looked right but the caliper says every dimension cut a little small.  A
 circle pocket drawn 1.50 diameter cut about 1.42 in diameter,  The tool
 diameter matched the tool specified in the cad program. Is there a good
 post
 on calibrating for a stepper motor machine?
 Thanks,
 Marty

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Re: [Emc-users] Beginner questions regarding axis.

[BRIAN GLACKIN]

Also check your G540 for the micro step setting to be sure it matches the
values in your INI file that Kirk was referring to.

On Sat, Sep 17, 2011 at 8:44 PM, Kirk Wallace
kwall...@wallacecompany.comwrote:

 On Sat, 2011-09-17 at 15:43 -0400, John A. Stewart wrote:
 ... snip
  3) I'm thinking that travel when homing in EMC2 is not correct,
  distance wise. I'm thinking that it is not moving as much as the
  readout on the screens say; I have 4mm pitch leadscrews, 1.8 degree
  steppers, directly coupled:
  Motor steps 200.0
  Driver Microstepping 2.0
  Pulley teeth 1.0 to 1.0
  Leadscrew 4.0 mm/rev
  Maximum Vel 8.3 mm/s  (machine says Rapid moving, 1000mm/min;
  feeding speed max 500mm/min)
  Maximum accel 50.0 mm/s2
 

 Scale = steps/unit
 units = mm

 200 motor steps/1 screw rev. x 2 (micro)steps/1 motor step x 1 screw
 rev./4mm = 200 x 2 / 4 = 100 steps / 1 mm

 so, your .ini file should have:
 -
 [AXIS 0]
 ...
 SCALE = 200
 OUTPUT_SCALE = 1.000
 ...
 [AXIS 1]
 ...
 SCALE = 200
 OUTPUT_SCALE = 1.000
 ...
 [AXIS 2]
 ...
 SCALE = 200
 OUTPUT_SCALE = 1.000
 ...
 --

 Unless I made a mistake.

 ... snip



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Re: [Emc-users] ***SPAM*** Re: Idle Current Issues

[BRIAN GLACKIN]

On mine, I simply pushed the Switching to EMC.  Toggling F2 enables and
disables the ICR.  When running, all axes are enabled.  Not perfect but it
works for me.

On Mon, Sep 12, 2011 at 9:26 PM, Jon Elson el...@pico-systems.com wrote:

 BRIAN GLACKIN wrote:
  John,
 
  I am certainly no expert and defer to your expertise.  I did not mean to
  imply that the motor lost steps, but meant it never received the step
 since
  it was consumed powering up the driver.
 If this is so, then that drive has a massive design defect, and the idle
 current reduction feature
 is hopelessly flawed, as it will lose steps somewhat unpredictably with
 practically every CNC
 software out there.  How can the CNC program know when the drive has
 powered down, so
 it can issue an extra wake up step?  The old Gecko drives has a
 one-shot that would set the
 drive back to full current within microseconds of the leading edge of
 the step pulse.

 Jon


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[Emc-users] Idle Current Issues

[BRIAN GLACKIN]

Gene,

You mentioned that you are having/had issues with the idle current setup on
your new drives.  The problem (imho) is that the hardware ICR solutions
require that steps be lost in order to wake the chip.  So no matter what, at
some point your likely to have missed steps.  I played ad nauseum with the
velocities and accelerations and kept getting frustrated by the creep (lost
steps) on the Z axis of my gantry router.  Since I mainly cut 2.5 D, the Z
is idle 95% of the time with very short moves deeper into or out of the
cut.  I do not know how many times my router drove across my 2' X 4' surface
at full depth on G0 back to the origin.  Its amazing how powerfull 200 oz-in
stepper motors are.

The Hobbycnc Pro board also has ICR.  Take a look at the Wiki regarding
this,  Kim Mortensen has a nice writeup on the issues with ICR that probably
go beyon just that board.

ICR on the HCNC board uses an RC pair to trigger the reduction.  I suspect
that it typical of most setups.  In my case, I simply eliminated the RC
pairs and direct wired the axis chips to the parrallel port.  Amp enable
from EMC triggers the chip to wake before any step is issued.  This
eliminated all issues I had with ICR.

Just a datapoint.
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Re: [Emc-users] ***SPAM*** Re: Idle Current Issues

[BRIAN GLACKIN]

John,

I am certainly no expert and defer to your expertise.  I did not mean to
imply that the motor lost steps, but meant it never received the step since
it was consumed powering up the driver.  I was bedeviled with my Z axis
never keeping position (it either went too high or more often too low)
during a prolonged cut sequence.  I broke a dozen endmills early on trying
to flush out the issue.

Kim Mortenson's writeup describes the methodology of the HCNC board with the
Allegro SLA7070M series chip.  THe write up is found here

http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?HobbyCNC

I would certainly be interested in any thoughts / expertise on this issue.

Brian

PS - Not sure why your post came marked as ***SPAM.  GMAIL would not let
me correct the header (or more likely I do not know how to correct the
header using gmail).



1.Stepmotors cannot loose one step, but the driver can. A 1.8 degree
200 fullstep/rev motor can only slip in increments of four fullsteps to
one of the 50 indent positions per revolution.
2.Drives can loose or gain steps for several reasons, but one common
cause is noise on the input lines. In the old days (before 9/11) the
input opto-coupler acted as an effective low pass filter with about a
200KHz cut-off frequency. New opto-couplers are good up to 15MHz, and
unless the driver design includes a simple low-pass filter, there can be
lots of false steps.
3. I never used a simple RC for current reduction. It was either a
timer IC or a timer function in the microcontroller. The response to
full current was typically less than one millisecond, and this did not
give a problem unless the motor was supporting a load that could produce
a torque overload at the reduced current. If that was the case we did
not use the current reduction feature.

Regards

__
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[Emc-users] Tooltable QUestion

[BRIAN GLACKIN]

Helping Dan Field with a question on setting up the Tool table (in another
forum).

He is using the tool offset commands and cutting with a 60 degree v bit.

Does the tool table care if its a v bit or just the overall diameter?
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ToolTable

The wiki does not seem to address whether is a end, ball or v mill.

My gantry is down right now so I can't check it out on my machine.

Brian
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Re: [Emc-users] Using a PC in extended temperature ranges and mobile application

[BRIAN GLACKIN]

I can't divulge great details since we are building the first machine

 and we have competitors that did not get the business, but would like to
 grab it if possible.


It sounds like an interesting project.

In the research I have done with remote machine monitoring (and GPS
breadcrumbing) most of the people appear to be using a small open
architecture hardware and software (linux) with bolt on components such as
the GPS, WIFI, and Cellular modems.

In your case, unless there is a tremendous amount of computing overhead
required, I would assume a tinkered smart phone could provide the computing
power, the necessary comunication, component durability,a nd finally, the
ability to quickly replace a damaged unit.  Of course that may be difficult
if you need to load EMC to the unit.

I recently was working with a company trying to develop a unit that would
mount on a drill rig.  My biggest complaint to them was thier inability to
tag pertinent data to a down the hole position.  Something an encoder plus
the GPS unit could have provided if they could have figured out how to tag
it to any of the various types of drilling platforms.

Hope you find your solution.

Brian
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Re: [Emc-users] Using a PC in extended temperature ranges and mobile application

[BRIAN GLACKIN]

Dave,

Any possibility of sharing what you indtend to use the equipment for on the
rig?  I am a mining engineer in the cement industry and have considered
placing remote electronics on drilling rigs and the mining equipment.  Too
many other fires to hold back in the meantime have kept me from pursuing
this..

I recently came across some ruggedized gear for mining equipment using open
hardware and a linux OS.  I am not advertising for this company but you can
see examples of the cases at 3d-p.com.  The price point they quoted was a
bit high (IMO) on a per unit basis for trial work I was considering.

Brian

On Sat, Jul 23, 2011 at 3:06 AM, Erik Christiansen
dva...@internode.on.netwrote:

 On 22.07.11 10:30, Dave wrote:
  Interesting..  so did you have to make any design changes to meet the
  95% RH requirements??

 No, the LED clock dissipated enough heat to avoid condensation at 95%
 RH. With purely dissipative dropping of the 12v to the 2v across each
 display segment, it effectively had an inbuilt heater. The PCB was
 covered in solder resist, which excluded moisture from circuit tracks,
 as well.

 [...]

  I wasn't aware of the load dump situation.Fortunately my past mobile
  work has used a 12 to 24 volt inverter to drive the control circuits,
  otherwise that probably would have been an issue.

 As it still lives, the inverter is either adequately protected, or
 hasn't experienced a load dump yet. If there's a hefty lead-acid battery
 in your equipment module, then it would probably absorb a load dump from
 the alternator, if it's in good nick. (Internal impedance low.)

 Erik

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Re: [Emc-users] Help with CabinetPartsPro and Router

[BRIAN GLACKIN]

What output options does the software have?  If you can get it to generate a
DXF, then you can use one of many DXFtoGCode tools.  I have seen similar
tools for HPGL output.

On Sun, May 1, 2011 at 8:54 PM, Rogers prax...@gmail.com wrote:

 Hi everyone,
 I have recently installed Cabinet Parts Pro in an effort to use my CNC
 router (Joes 4 x 4) to cut out a small kitchen. The software doesn't have
 EMC2 listed as a post processor but has many other options. Has anyone ever
 used this application successfully with EMC2? if so, id appreciate some
 advice please. If anyone knows of an alternative cabinet layout/design app
 that might be open source then id like to know about it. I'm using the
 older, free version of CPP.
 Thanks.
 Regards
 Neil in Australia

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Re: [Emc-users] Router Cutter v Milling Cutter

[BRIAN GLACKIN]

I use solid carbide 2 flute up spiral bits (1/8) in MDF for cutting out all
kinds of stuff.  I usually get several ours of continous cutting out of a
bit (1/8 deep passes at 30-50IPM).

Hope that adds a data point.

On Thu, Apr 28, 2011 at 11:38 AM, gene heskett ghesk...@wdtv.com wrote:

 On Thursday, April 28, 2011 10:56:53 AM andy pugh did opine:

  On 28 April 2011 15:28, gene heskett ghesk...@wdtv.com wrote:
   :( I keep forgetting which side of the pond you are on, but is there
   :not a
  
   similar retailer catering to the construction trades there?
 
  Not at the prices you suggest:
  http://www.cromwell.co.uk/static/publication/990/pages/141.pdf

 Unforch, FF4 and pdf's are currently not speaking to each other very well.
 So I fed the link to Okular directly, worked a treat.

 But those prices are some serious gouging IMO.  I don't know the exchange
 rate, but the last time I did, it was over 2 dollars a pound, so that price
 is patently outrageous.  Almost 4x what I would pay here.

 I think this calls for some serious google-fu.

 I have been getting most of my stuff from an outfit over in Ohio, but I'll
 have to go to the shop  get their catalog.

 Yeah, http://www.hemlytool.com  You can dl and print their current
 catalog, which does contain prices in USD.

 I see the prices have risen since my 2009 catalog, but these guys never
 seem to be out of stock, and for shipping here in the states, I have had
 the order fall off the passing UPS truck the next day at least once.  But
 even after import duties etc, those prices have got to be better than your
 link.  But obviously no where near as instant to your location.  That's a
 bummer.  But perhaps you can take that catalog and beat them into a better
 price schedule with it?

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Re: [Emc-users] Router Cutter v Milling Cutter

[BRIAN GLACKIN]

 I've been known to mount an inexpensive router (Hitachi) on the bottom
 of my spindle for routing.

 I use a $24 HF long shaft electric die grinder


 Whatever you do  dust is  going to be a problem.

The EDG does not blow motor cooling air at the bit point so the dust just
piles up around the cutting point.  Since the dust exiting the cut is only
getting accelerated by the bit, small shop vac mounted within 2 inches of
the bit provides enough suction to capture the finest dust.

BG


 HTH

 Dave






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Re: [Emc-users] Vacuum table

[BRIAN GLACKIN]

peg board is a perforated MDF sheet.  Its typically 0.25 inches thick.  Its
used to hook hangers on for tools and other items.

On Thu, Apr 28, 2011 at 4:10 PM, Viesturs Lācis viesturs.la...@gmail.comwrote:

 My apologies, but I think that I do not understand, what do You mean
 :) What is peg board and shop vac?
 I am considering any viable solution and in search for options I am
 now in process of reading a thread in CNCZone about vacuum tables...

 Viesturs

 2011/4/28 Kyle Kerr ker...@gmail.com:
   Have you given any thought to peg board, a frame, and a shop vac?
 
  On Thu, Apr 28, 2011 at 11:41 AM, R. van Twisk e...@rvt.dds.nl wrote:
  Viesturs,
 
  I know a number of people on the Mechmate forum do have experiences
  in that area including photo's and type of vacuum systems used.
 
  Ries
  On Apr 28, 2011, at 10:38 AM, Viesturs Lācis wrote:
 
  Hello, folks!
 
  Has anyone ever built a vacuum table? I need a solution to hold down
  plywood with vacuum for a router.
  I have been googling to find something useful, and I would like to
  ask, if any of list members could share their experience or a good
  source of information about efficient and cost-effective vacuum table.
 
  Thanks in advance!
  Viesturs
 
 
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Re: [Emc-users] Axis enable pins

[BRIAN GLACKIN]

On Fri, Apr 22, 2011 at 11:02 AM, Kev James rincewin...@gmail.com wrote:

 Just got to test it. X-axis is working fine but I don't seem to be getting
 any power to the y/z outputs. I have assigned amplifier enable to the three
 enable pins for the three axes. I get about 1.5v across A/!A and B/!B for
 the X axis, but 0 for the Y and Z.

 Does this sounds like a hardware problem to you? If so I will see if I can
 find someone who knows about electronics to try and help me narrow this
 down.

 Does the board have adjustable POTs for each axis?  Perhaps you have them
set to zero for the Y/Z axes and that is the reason??


 Cheers,
 KEv.


 On 13 April 2011 10:02, Kev James rincewin...@gmail.com wrote:

  Thanks Chris - I will try this when I get home.
 
 
  On 13 April 2011 09:32, Chris Morley chrisinnana...@hotmail.com wrote:
 
 
 
 
   So what I'm asking is, is it possible to edit the configuration in
 such
  a
   way that I can configure output pins to send a signal to enable the
  X/Y/Z
   axis?
  
   Cheers,
   KEv.
 
  This is what the 'amplifier enable' signal (in stepconf) is for.
  You can actually add it to more then one parport pin if you
  need more then one.
 
  Chris M
 
 
 
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Re: [Emc-users] installing EMC in Ubuntu10.4

[BRIAN GLACKIN]

I had all kinds of installtion probelms my first time.  The item that
finally broke through for me was to add the command NOAPIC to the
istallation command line.  On the older images, you would boot to a options
screen before the install.  I believe F6 was custom or command line
install.  On selecting that, it would show the entire command spelled out -
I simply spaced to the end of it, added NOAPIC and hit enter and it
installed.  And yes, myine was an old Dell as well with Xp as the former
system.

On Tue, Apr 19, 2011 at 12:07 PM, andy pugh bodge...@gmail.com wrote:

 On 18 April 2011 22:00, Douglas Pollard dougp...@verizon.net wrote:
  Hi all,  I have a  a dell computer with XP in it.I downloaded EMC with
  Ubuntu 10.04 and burnt a desktop dvd.

 I wouldn't want to guarantee any better success with this method, but
 I did my installation using a combination of the ISO file and the
 stuff at www.pendrivelinux.com.


 --
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Re: [Emc-users] Oval trajectories

[BRIAN GLACKIN]

You can also use a o-word subroutine with the centers, radius and distance
betwen centers as variables.  Once written, generating the ovals is simply a
matter of changing variables.

On Sun, Apr 17, 2011 at 12:08 PM, Igor Chudov ichu...@gmail.com wrote:

 Thanks Andy. I will just write a G code routine that does this, I have been
 writing G code subs and I love that!

 i

 On Sun, Apr 17, 2011 at 11:03 AM, andy pugh bodge...@gmail.com wrote:

  On 17 April 2011 16:56, Igor Chudov ichu...@gmail.com wrote:
   I would like to know if/how I can do oval/elilpse trajectories
 (described
  by
   a quadratic equation ax^2+bxy+cy^2+dx+ey+f=0) with EMC.
 
  One simple way would be as a sequence of short lines, and let EMC2 blend
  them.
  You can probably create the G-code in a spreadsheet.
 
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Re: [Emc-users] OT made a new milling enclosure

[BRIAN GLACKIN]

  Mark, there are so many glues, do you know  which specific glue you used?

 Not off the top of my head, but I'll look when I get home from work at
 the tube and get the name of it for you.


Get the clear silicone.  Same as they use in cement plants and bathrooms
(glass shower surrounds)- cures hard and very heat resistant to boot.
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Re: [Emc-users] multiple instances of emc?

[BRIAN GLACKIN]

First off, there are two separate and interesting threads intertwined in
this discussion.  It would be nice to see them split out.

As to running multiple instances of EMC on a single computer (whether
practical or not), from my perspective, is a less desirable situation.

EMC makes machine control available to many users for little cost.  Adding
complexity with multiple instances on a single motherboard may be a neat
science project, but in an industrial environment will add unnecessary
complexity.  This complexity will increase commissioning time as well as
hamper troubleshooting in the case of hardware problems.  Motherboards are
cheap.  If one instance goes haywire - right of the bat, you know what
machine is the culprit.  If you have a multiple instance machine, one of the
cpu's could cause problems and since there is some integration through the
unified motherboard, you could see ghost issues on the other instances
making troubleshooting more difficult and time consuming. In a multi
motherboard scenario, the offending unit will be obvious, slap in a new
board with a mirrored hard drive and your up and running.

I am with Stuart.  This might be a good time to start looking for a Overhead
software process that can manage multiple and independent instances of EMC.
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Re: [Emc-users] Math Q

[BRIAN GLACKIN]

On Wed, Mar 23, 2011 at 12:49 AM, gene heskett ghesk...@wdtv.com wrote:

 On Wednesday, March 23, 2011 12:35:24 AM Igor Chudov did opine:

  On Tue, Mar 22, 2011 at 10:28 PM, gene heskett ghesk...@wdtv.com
 wrote:
   Anyway, http://gene.homelinux.net:85/gene/emc
   new toy is left pix in next to the last row.
 
  Looks awesome. I still have not completed my high speed spindle.

 I put a slightly used Bosch solid carbide 1/4 upcut spiral bit in it to
 play with this evening, and swept it back  forth over the end of a short
 stick of white ash, a moderately hard and dense wood.  If I only advance it
 about 1/4 of the diameter, the finish is so smooth I could plate it  use
 it for a mirror.  Absolutely no tear out at the edges of the cut, it will
 do great for carving tenons in woodworking.

 I mounted a half inch router bit in my HF grinder and used it to face the
sacraficial board on my table.  It powered through it nicely.

I currently run my HF spindle using a 1/8 endmill 30-90 ipm at 0.1 passes.


 I will fault the on-off switch though, that puppy is stiff  not near
 enough of a finger purchase to slide it, I hope it breaks in before it
 breaks.

 The switch is not one of the better points of this tool.  I bought a dual
relay board and one day I will hook it up to avoid having to fuss with the
switch.


 No idea if its a PM field or plane universal motor, but I suspect the
 latter.  If it was a PM field, I'd hook the mills speed controller to it,
 but that would need a 5 amp fuse then, currently the mills own motor is a 2
 amp fuse limit.


I would be interested in donating my spare HF grinder for experimentation if
you want to try and figure this out.


 But at 25k rpms, I'd ought to be able to carve at 15-20 ipm as long as its
 a climb cut.  Pretty fast for that toy mill.

  I have also run 1/4 inch up spiral endills at .75 in MDF due to improper
gcoding on my part.  Amazingly it powered through that at 20 ipm.  I would
not recommend that too often.

Thanks for sharing your photos.  I would love to spend more time on my
projects too, but traveling to St. louis keeps me locked up in hotels
instead.


 I was going to buy a Grizzly G0704, but it has disappeared from their web
 page just this past week.  For a kilobuck, that was a heck of a good buy.

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Re: [Emc-users] higher speed spindle

[BRIAN GLACKIN]

 weight.  HF also has a die grinder that might work too.  I'll go look
 again.

I use HF's Long Shaft Die Grinder for $24.99 (on sale with 20% off coupon).
If you go this route, check the collet end as some can have along of play.
I currently have 2 of these (for 1/4 and 1/8 collets).  The collets on
these are pretty cheap but serviceable.

Brian
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Re: [Emc-users] higher speed spindle

[BRIAN GLACKIN]

 How did you go about mounting it to your rig, Brian?

 I mounted mine using three pieces of 3/4 MDF

Two had a slot cut to fit the shaft of the spindle.  I also put notches in
the inner curve where the casting lines on the spindle would meet the slot.

The third piece acts as a guillotine between the other two.  It is slotted
as well and I also drilled two holes through this third piece.  I used all
thread through these holes to a backing plate on the Z carraige.  On the
outboard side, I used washers and wingnuts to secure it.  THis allows me to
quickly take the unit off the machine with little fuss.

I will take a picture this evening and email it to you.  I doubt my powers
of description will prove equal to a simple photo.

I would avoid using the plastic motor case as a fixture point as the screws
holding the motor to the spindle nose are less than substantial.

I originally got the idea of using this grinder from this post almost 2
years ago.
http://www.cnczone.com/forums/showthread.php?t=42227
Just eliminating the cooling air wash across the workpiece is worth the
effort over a router.  A small shop vac with this grinder will provide more
than adequate dust collection for wood/MDF cutting.

Brian
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Re: [Emc-users] higher speed spindle

[BRIAN GLACKIN]

I forgott o mention.  Check out Woodgears.ca for his tenoning jigs - lots of
good stuff there.

On Tue, Mar 15, 2011 at 1:32 PM, BRIAN GLACKIN glackin.br...@gmail.comwrote:


 How did you go about mounting it to your rig, Brian?

 I mounted mine using three pieces of 3/4 MDF

 Two had a slot cut to fit the shaft of the spindle.  I also put notches in
 the inner curve where the casting lines on the spindle would meet the slot.

 The third piece acts as a guillotine between the other two.  It is slotted
 as well and I also drilled two holes through this third piece.  I used all
 thread through these holes to a backing plate on the Z carraige.  On the
 outboard side, I used washers and wingnuts to secure it.  THis allows me to
 quickly take the unit off the machine with little fuss.

 I will take a picture this evening and email it to you.  I doubt my powers
 of description will prove equal to a simple photo.

 I would avoid using the plastic motor case as a fixture point as the screws
 holding the motor to the spindle nose are less than substantial.

 I originally got the idea of using this grinder from this post almost 2
 years ago.
 http://www.cnczone.com/forums/showthread.php?t=42227
 Just eliminating the cooling air wash across the workpiece is worth the
 effort over a router.  A small shop vac with this grinder will provide more
 than adequate dust collection for wood/MDF cutting.

 Brian






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Re: [Emc-users] Jog in EMC

[BRIAN GLACKIN]

Using the keyboard with the default setup, I can jog all three axes
simultaneously using the PgUp/PgDn for Z, Rt/Lt arrows for X, and up/Dn
arrows for Y.

On Sun, Feb 13, 2011 at 12:08 AM, Igor Chudov ichu...@gmail.com wrote:

 This is what I use


 http://igor.chudov.com/projects/Bridgeport-Series-II-Interact-2-CNC-Mill/26-Setting-Up-Saitek-P880-Joypad-with-EMC2

 On Sat, Feb 12, 2011 at 10:34 PM, a...@conceptmachinery.com wrote:

  Hi
  I can jog in EMC 1 axis at the time. Click on axis and jog.
  How i can move 3 axis in manual mode simultaneously. I want to use 3
  separate  input devices to do that.
 
  thanks
  aram
 
 
 
 
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Re: [Emc-users] Stepper motor temperatures?

[BRIAN GLACKIN]

On Tue, Feb 8, 2011 at 7:34 AM, John Thornton bjt...@gmail.com wrote:

 I mounted a cup holder on my stepper to keep my coffee at ideal
 temperatures while cutting with my plasma torch.

Its gems like these that keep me pegged to this list.  I see a new project
for the weekend!

B.
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