Re: [Emc-users] custom m codes tutorial and cnc lathe bar pulling

[andy pugh]

On Sun, 29 Jan 2023 at 10:22, andrew beck  wrote:

> Hey you might know how to loop a gcode file
>
> I want to loop a gcode file 50 times.

O100 REPEAT [50]
{Gcode}
O100 ENDREPEAT

http://linuxcnc.org/docs/stable/html/gcode/o-code.html#ocode:repeat


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


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[Emc-users] custom m codes tutorial and cnc lathe bar pulling

[Roland Jollivet]

I do like the 'bar pusher' as opposed to a puller...

https://www.youtube.com/watch?v=1vumk-ZvnjU

Roland


On Sun, 29 Jan 2023 at 12:21, andrew beck  wrote:

> Thanks gene
>
> Hey you might know how to loop a gcode file
>
> I want to loop a gcode file 50 times.
>
> Ideally using m98 and m99
> But I'm a bit stuck on how to do it.
>
> Does anyone have some tips?
>
> This is for bar pulling in CNC lathe
>
> M400 unclamps chuck and m401 clamps chuck
>
>
> And I need some way to loop the g code
>
> On Fri, 27 Jan 2023, 15:12 gene heskett,  wrote:
>
> > On 1/26/23 16:42, andrew beck wrote:
> > > hey guys
> > >
> > > just wanted to let people know i just made a tutorial on custom m codes
> > and
> > > i couldn't find much info on it and wanted to help the next guy and
> > remind
> > > myself when i forget next time lol
> > >
> > >
> >
> https://forum.linuxcnc.org/10-advanced-configuration/48071-custom-m-codes-and-bar-puller-set-up#262959
> > >
> > >
> > > and also if any of you machinists have good tips for bar pulling on a
> cnc
> > > lathe i would love the ideas i have never done it before
> > >
> > > regards
> > >
> > > Andrew
> > >
> >
> > I don't have a bar puller, not even a 5C collet, just an ER42 collet
> > kit. If I am doing multiple copies, I position the tool to act as a
> > stopper, loosen the big nut and push the rod thru to touch the tool,
> > tightening the nut again gets me a couple thou clearance but that can be
> > compensated for in your program. With a reasonable speed of bar pusher
> > so it does not damage the tool when it hits the tool, it ought to work
> > till you are out of that bar.
> >
> > One could put a microswitch in the position of the tool to automate
> > that, including a shutdown when the bar no longer trips the switch in a
> > long enough time it should have tripped.
> >
> > With a couple solenoids to engage the nut wrench, and a reversible vfd,
> > that all could be programmed. Even to ejecting the bars remains and
> > feeding a new one from a rack of them could be done.
> >
> > Lots of ways to skin that cat. This is just three ideas.
> >
> > Take care and stay well, Andrew.
> >
> > 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 
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
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Re: [Emc-users] custom m codes tutorial and cnc lathe bar pulling

[gene heskett]

On 1/29/23 05:18, andrew beck wrote:

Thanks gene

Hey you might know how to loop a gcode file

I want to loop a gcode file 50 times.



Eazy peazy, Andrew.

Define the part as a subroutine keeping in mind the subroutine must be 
first in the .ngc file.

Allocate a counter var and set it near the top of the file
#<_varname>=50
That is a global variable, declared by #<_name>, available anyplace in 
the file. Leave out the leading underscore and it becomes available only 
in the "scope" of that routine.
So if you want a reusable varname, seen only inside that sub to serve as 
an increment/decrement value for a size, declare it in the sub code as 
#. so the sub can do exactly the same turndown to target size in 
its own loop.


Wrap the code that makes the part in:
o200 Sub
your part code goes here
o200 endsub

Then do the loop 50 times
o100 While [<#_varname gt 0.0]
o200 call
#<_varname> = [#<_varname. - 1.00]
o100 endwhile
M2 (shutdown, done)

load this once, hit r to repeat it till you wear out the r or are out of 
stock


Page numbers will be different, but in the 2.10 (master) 
Ducumentation.pdf start reading at "Usage", "g codes", "o codes", around 
page 945.  Its all there. Highly recommended reading.


I'm fond of 2 editors, "nano -l /path/to/filename" works in any 
environment. And geany works even better in x or wayland. gedit comes to 
mind, but I've had gedit destroy weeks of work in a blink, quite a few 
times, so its been banned/purged from my machines. Geany has never saved 
anything by scrambling the content. WYSIWYG IOW.


Someplace in my midden heap of nc_files, I have a 90 line file that 
takes 3 days to run on a mill I no longer have, sharpening a dull 
carbide ATBF 10" saw blade. Sharper by far that any new blade, I just 
took about 3 thou of the face of every tooth on it using a 4" motorized 
table to position the blade while a dremel carrying one of their $20 
diamond disks was just touching it. Literally one step of the motor on 
the rotary table at a time.


Don't try that on a steel blade, you'll just burn up the diamond because 
there's carbon in both.  On tool steel like a lathe tool, use a CBN 
wheel. No carbon to alloy with the HSS until its hard enough to heat and 
 destroy the diamond.


Bring money in little red wagons but its magic for lathe tools. Don't 
crowd it though, your grinding HSS tool steel at the right rate if you 
can see the dust drifting away in a strong light, but not a lot of fire. 
With a 2000 grit wheel, you get an edge finish like a mirror w/o a wire 
edge that dulls quickly by breaking off the wire edge. Works on dull 
carbide tools too.



Ideally using m98 and m99
But I'm a bit stuck on how to do it.

Does anyone have some tips?

This is for bar pulling in CNC lathe

M400 unclamps chuck and m401 clamps chuck


And I need some way to loop the g code

On Fri, 27 Jan 2023, 15:12 gene heskett,  wrote:


On 1/26/23 16:42, andrew beck wrote:

hey guys

just wanted to let people know i just made a tutorial on custom m codes

and

i couldn't find much info on it and wanted to help the next guy and

remind

myself when i forget next time lol



https://forum.linuxcnc.org/10-advanced-configuration/48071-custom-m-codes-and-bar-puller-set-up#262959



and also if any of you machinists have good tips for bar pulling on a cnc
lathe i would love the ideas i have never done it before

regards

Andrew



I don't have a bar puller, not even a 5C collet, just an ER42 collet
kit. If I am doing multiple copies, I position the tool to act as a
stopper, loosen the big nut and push the rod thru to touch the tool,
tightening the nut again gets me a couple thou clearance but that can be
compensated for in your program. With a reasonable speed of bar pusher
so it does not damage the tool when it hits the tool, it ought to work
till you are out of that bar.

One could put a microswitch in the position of the tool to automate
that, including a shutdown when the bar no longer trips the switch in a
long enough time it should have tripped.

With a couple solenoids to engage the nut wrench, and a reversible vfd,
that all could be programmed. Even to ejecting the bars remains and
feeding a new one from a rack of them could be done.

Lots of ways to skin that cat. This is just three ideas.

Take care and stay well, Andrew.

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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.


Cheers, Gene Heskett.
--

Re: [Emc-users] custom m codes tutorial and cnc lathe bar pulling

[Rob C]

https://linuxcnc.org/docs/html/gcode/o-code.html#ocode:fanuc-style-programs

use the "L" switch for looping X number of times

On Sun, 29 Jan 2023, 10:22 andrew beck,  wrote:

> Thanks gene
>
> Hey you might know how to loop a gcode file
>
> I want to loop a gcode file 50 times.
>
> Ideally using m98 and m99
> But I'm a bit stuck on how to do it.
>
> Does anyone have some tips?
>
> This is for bar pulling in CNC lathe
>
> M400 unclamps chuck and m401 clamps chuck
>
>
> And I need some way to loop the g code
>
> On Fri, 27 Jan 2023, 15:12 gene heskett,  wrote:
>
> > On 1/26/23 16:42, andrew beck wrote:
> > > hey guys
> > >
> > > just wanted to let people know i just made a tutorial on custom m codes
> > and
> > > i couldn't find much info on it and wanted to help the next guy and
> > remind
> > > myself when i forget next time lol
> > >
> > >
> >
> https://forum.linuxcnc.org/10-advanced-configuration/48071-custom-m-codes-and-bar-puller-set-up#262959
> > >
> > >
> > > and also if any of you machinists have good tips for bar pulling on a
> cnc
> > > lathe i would love the ideas i have never done it before
> > >
> > > regards
> > >
> > > Andrew
> > >
> >
> > I don't have a bar puller, not even a 5C collet, just an ER42 collet
> > kit. If I am doing multiple copies, I position the tool to act as a
> > stopper, loosen the big nut and push the rod thru to touch the tool,
> > tightening the nut again gets me a couple thou clearance but that can be
> > compensated for in your program. With a reasonable speed of bar pusher
> > so it does not damage the tool when it hits the tool, it ought to work
> > till you are out of that bar.
> >
> > One could put a microswitch in the position of the tool to automate
> > that, including a shutdown when the bar no longer trips the switch in a
> > long enough time it should have tripped.
> >
> > With a couple solenoids to engage the nut wrench, and a reversible vfd,
> > that all could be programmed. Even to ejecting the bars remains and
> > feeding a new one from a rack of them could be done.
> >
> > Lots of ways to skin that cat. This is just three ideas.
> >
> > Take care and stay well, Andrew.
> >
> > 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 
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
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Re: [Emc-users] custom m codes tutorial and cnc lathe bar pulling

[andrew beck]

Thanks gene

Hey you might know how to loop a gcode file

I want to loop a gcode file 50 times.

Ideally using m98 and m99
But I'm a bit stuck on how to do it.

Does anyone have some tips?

This is for bar pulling in CNC lathe

M400 unclamps chuck and m401 clamps chuck


And I need some way to loop the g code

On Fri, 27 Jan 2023, 15:12 gene heskett,  wrote:

> On 1/26/23 16:42, andrew beck wrote:
> > hey guys
> >
> > just wanted to let people know i just made a tutorial on custom m codes
> and
> > i couldn't find much info on it and wanted to help the next guy and
> remind
> > myself when i forget next time lol
> >
> >
> https://forum.linuxcnc.org/10-advanced-configuration/48071-custom-m-codes-and-bar-puller-set-up#262959
> >
> >
> > and also if any of you machinists have good tips for bar pulling on a cnc
> > lathe i would love the ideas i have never done it before
> >
> > regards
> >
> > Andrew
> >
>
> I don't have a bar puller, not even a 5C collet, just an ER42 collet
> kit. If I am doing multiple copies, I position the tool to act as a
> stopper, loosen the big nut and push the rod thru to touch the tool,
> tightening the nut again gets me a couple thou clearance but that can be
> compensated for in your program. With a reasonable speed of bar pusher
> so it does not damage the tool when it hits the tool, it ought to work
> till you are out of that bar.
>
> One could put a microswitch in the position of the tool to automate
> that, including a shutdown when the bar no longer trips the switch in a
> long enough time it should have tripped.
>
> With a couple solenoids to engage the nut wrench, and a reversible vfd,
> that all could be programmed. Even to ejecting the bars remains and
> feeding a new one from a rack of them could be done.
>
> Lots of ways to skin that cat. This is just three ideas.
>
> Take care and stay well, Andrew.
>
> 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 
>
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

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Re: [Emc-users] custom m codes tutorial and cnc lathe bar pulling

[gene heskett]

On 1/26/23 16:42, andrew beck wrote:

hey guys

just wanted to let people know i just made a tutorial on custom m codes and
i couldn't find much info on it and wanted to help the next guy and remind
myself when i forget next time lol

https://forum.linuxcnc.org/10-advanced-configuration/48071-custom-m-codes-and-bar-puller-set-up#262959


and also if any of you machinists have good tips for bar pulling on a cnc
lathe i would love the ideas i have never done it before

regards

Andrew



I don't have a bar puller, not even a 5C collet, just an ER42 collet 
kit. If I am doing multiple copies, I position the tool to act as a 
stopper, loosen the big nut and push the rod thru to touch the tool, 
tightening the nut again gets me a couple thou clearance but that can be 
compensated for in your program. With a reasonable speed of bar pusher 
so it does not damage the tool when it hits the tool, it ought to work 
till you are out of that bar.


One could put a microswitch in the position of the tool to automate 
that, including a shutdown when the bar no longer trips the switch in a 
long enough time it should have tripped.


With a couple solenoids to engage the nut wrench, and a reversible vfd, 
that all could be programmed. Even to ejecting the bars remains and 
feeding a new one from a rack of them could be done.


Lots of ways to skin that cat. This is just three ideas.

Take care and stay well, Andrew.

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] custom m codes tutorial and cnc lathe bar pulling

[Ed]

On 1/26/23 2:57 PM, andrew beck wrote:

hey guys


and also if any of you machinists have good tips for bar pulling on a cnc
lathe i would love the ideas i have never done it before

regards

Andrew


How big of bar do you want to pull? What kind of machine


I have run runs of over 1K pieces with a bar puller on my CHNC Hardinge 
with LCNC. 1/4" to 1" easily.



Ed.




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[Emc-users] custom m codes tutorial and cnc lathe bar pulling

[andrew beck]

hey guys

just wanted to let people know i just made a tutorial on custom m codes and
i couldn't find much info on it and wanted to help the next guy and remind
myself when i forget next time lol

https://forum.linuxcnc.org/10-advanced-configuration/48071-custom-m-codes-and-bar-puller-set-up#262959


and also if any of you machinists have good tips for bar pulling on a cnc
lathe i would love the ideas i have never done it before

regards

Andrew

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