Re: [Emc-users] experimental bearings for harmonic drive

[Gregg Eshelman via Emc-users]

Try a Harbor Freight 2.5 gallon paint pressure tank. Unscrew the dip tube from 
the bottom of the lid and everything off the top to put in a hose fitting and 
vacuum gauge. Plug any leftover holes. :)
 

On Wednesday, March 31, 2021, 3:33:55 PM MDT, Gene Heskett 
 wrote:  
I have an evacuation pump, but not a ready chamber big enough or strong 
enough to put a spool in. I'll investigate some big pvc pipe. Maybe that 
would work if 8" will take a spool.  If I can find caps I can o-ring 
seal. I dried a soggy hunk of maple that way for a gunstock 13 years 
ago, but had to glue the caps on keeping it better than 27" hg below 
atmosphere for about a year. Most stable piece of wood I ever carved, 
plain straight grained stuff with cherry trim.  Thumbhole style holding 
up a cheap TC 50 cal BP rifle, gets the ooohs and ahhs at the range when 
I drag it out.  Also does 1.25" 5 shot groups at 50 yards too. Pretty 
good for a $200 gun 25 years ago, with my mods of course. :)  
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Re: [Emc-users] experimental bearings for harmonic drive

[Gregg Eshelman via Emc-users]

Spread on the glue stick then spread it around with a damp paper towel. Heating 
the bed dries it to a smooth coating.


On Wednesday, March 31, 2021, 2:40:24 PM MDT, Karl Schmidt  
wrote:  
 
 On 3/28/21 11:52 AM, John Dammeyer wrote:
> 
> A friend has told me he's had PETG stick so well that it breaks off some of 
> the glass build plate.  Seems a bit extreme but that's what he's reported.
> 

Never thought I would use my 3D printer as much as I do. I've also broken glass 
plates with PETG and nylon sticking too 
well (pulls out bits of glass) - I get mirror tiles to print on - very 
inexpensive, but I still don't want to break them...

The key I've found is getting the glass perfectly clean - (A-IPA with a 
chem-wipe should squeak) excellent for PLA - but 
other plastics can stick too well or not well enough - so for those I use 
Elmers glue stick - it breaks instead of the 
glass - the problem is getting  complete and consistent coverage. Supposed to 
be made of an acrylic polymer - wish I 
could find it as a spray.

I've printed gaskets using TBU - and used several nylon types - I've found 
Nylon-X to be amazingly strong - (a bit 
pricey - but printing something that is brittle isn't cheap in the long run) 
These days I use nylonX unless there is a 
good reason not to.. ( I use a vacuum chamber to dry filament - even PLA - 
makes a lot of difference).  
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Re: [Emc-users] Rotary axis preview (in axis interface)

[John Dammeyer]

My appologies.  Was editing the incorrect ini file.  The clue was when I went 
back to edit again and it appeared that AXYZ had reverted back to xyza.

And sure enough, once I fixed the 'correct' ini file I also get the rotary axis 
preview.  

John

> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: March-31-21 7:37 PM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] Rotary axis preview (in axis interface)
> 
> Scott,
> There are only a couple of differences.
> I have
> ARCDIVISION=64
> GRIDS = 10mm 20mm 50mm 100mm 1in 2in 5in 10in
> I've also added a panel but that's outside the display screen.
> PYVCP = pyvcp-panel.xml
> 
> and I'm missing
> CYCLE_TIME = 100
> 
> Here's mine.
> [DISPLAY]
> DISPLAY = axis
> POSITION_OFFSET = RELATIVE
> POSITION_FEEDBACK = ACTUAL
> MAX_FEED_OVERRIDE = 1.50
> MAX_SPINDLE_OVERRIDE = 1.00
> MIN_SPINDLE_OVERRIDE = 0.50
> INTRO_GRAPHIC = linuxcnc.gif
> INTRO_TIME = 5
> PROGRAM_PREFIX = /home/john/linuxcnc/nc_files
> INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
> ARCDIVISION = 64
> GRIDS = 10mm 20mm 50mm 100mm 1in 2in 5in 10in
> POSITION_FEEDBACK = ACTUAL
> DEFAULT_LINEAR_VELOCITY = 1.00
> MIN_LINEAR_VELOCITY = 0
> MAX_LINEAR_VELOCITY = 3.0
> DEFAULT_ANGULAR_VELOCITY = 90.00
> MIN_ANGULAR_VELOCITY = 0
> MAX_ANGULAR_VELOCITY = 180.00
> EDITOR = mousepad
> GEOMETRY = AXYZ
> PYVCP = pyvcp-panel.xml
> 
> > -Original Message-
> > From: Scott Harwell via Emc-users [mailto:emc-users@lists.sourceforge.net]
> > Sent: March-31-21 6:24 PM
> > To: Enhanced Machine Controller (EMC)
> > Cc: Scott Harwell
> > Subject: Re: [Emc-users] Rotary axis preview (in axis interface)
> >
> >  John,
> > I have it almost working. The tool still tilts, but it will display the 
> > ring, and you can see what is happening.
> > From my INI
> >
> > [DISPLAY]
> > DISPLAY = axis
> > POSITION_OFFSET = RELATIVE
> > POSITION_FEEDBACK = ACTUAL
> > MAX_FEED_OVERRIDE = 2.00
> > MAX_SPINDLE_OVERRIDE = 1.50
> > MIN_SPINDLE_OVERRIDE = 0.50
> > INTRO_GRAPHIC = linuxcnc.gif
> > INTRO_TIME = 5
> > PROGRAM_PREFIX = /home/sh/linuxcnc/nc_files
> > INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
> > POSITION_FEEDBACK = ACTUAL
> > DEFAULT_LINEAR_VELOCITY = 0.25
> > MAX_LINEAR_VELOCITY = 1.00
> > MIN_LINEAR_VELOCITY = 0.016670
> > DEFAULT_ANGULAR_VELOCITY = 12.00
> > MAX_ANGULAR_VELOCITY = 180.00
> > MIN_ANGULAR_VELOCITY = 1.67
> > EDITOR = gedit
> > GEOMETRY = aXYZ
> > CYCLE_TIME = 100
> > Excuse the speeds this is from my prototype system, no machine.
> > Scott
> >
> >
> > On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer 
> >  wrote:
> >
> >  Forgot to mention I had tried that.? I have it set to AXYZ.? The tool 
> > images starts with the flat of the tool cone facing away from
> me.?
> > I can now also see the A change briefly to say 20 and then back to zero, 
> > probably due to the G92.
> >
> > But it's still drawing the image as if it's in one spot.? Which in effect 
> > it is since the rotary axis, in line with the X axis is turning so the
> > XYZ remain the same other than Z moving into the work to cut and out to 
> > retract.? X moves along the graduations and AX move to
> > draw the letters.
> >
> > So something else in the INI or HAL file is still confusing the system.
> >
> > John
> > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > >
> > > You need in the display section of the INI file
> > >
> > > GEOMETRY = AXYZ
> > >
> > > On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  
> > > wrote:
> > >
> > > >
> > > > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > > > >
> > > > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > > > >
> > > > Alright, I'm confused.
> > > > I've got the G-Code turning the 4th axis A.? The X moves back and forth
> > > > for carving the lines as does A when letters are carved.? At 90 degrees 
> > > > the
> > > > conical tool image on the AXIS screen has rotated 90 degrees but the
> > > > location of A is still zero on the screen as well as I don't get that
> > > > circular image that Sam has.
> > > > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> > > >
> > > > So physically the Axis is turning.? But it doesn't seem to be 
> > > > represented
> > > > on the screen.? What could be missing?? Something in the HAL or INI 
> > > > file?
> > > >
> > > > Thanks
> > > > John
> > > >
> > > >
> > > >
> > > > ___
> > > > Emc-users mailing list
> > > > Emc-users@lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > > >
> > >
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> >
> >
> > ___
> > Emc-users mailing list
> > 

Re: [Emc-users] experimental bearings for harmonic drive

[Gregg Eshelman via Emc-users]

I use an old food dehydrator for drying filament. Flowing air will carry 
moisture away quicker and heats more evenly. Same dehydrator I use for post 
curing resin castings.
 

On Wednesday, March 31, 2021, 11:41:32 AM MDT, Gene Heskett 
 wrote:  

> Is it possible that the filament is damp? Has it been left out in the
> atmosphere for weeks?

Unsealed from a vacuum packed bag Sunday, so it should be pretty dry yet. 
So I now have one nearly empty spool of this odd size, and this one to 
use up yet. If I build a third, the nearly empty spool will get 
finished. The dremel claims it will pause and wait if it runs out mid 
build. I've no clue how it does that but the upper guide feeding the 
head mounted ejector, has a 3 conductor cable coming out of the bottom 
of its plastic molding.  And I've most of a roll of green PETG left on 
the ender that I'll probably put in the oven for a few hours before I 
rewind it on a dremel spool.  
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Re: [Emc-users] Rotary axis preview (in axis interface)

[John Dammeyer]

Scott,
There are only a couple of differences.
I have 
ARCDIVISION=64 
GRIDS = 10mm 20mm 50mm 100mm 1in 2in 5in 10in
I've also added a panel but that's outside the display screen.
PYVCP = pyvcp-panel.xml

and I'm missing 
CYCLE_TIME = 100

Here's mine.
[DISPLAY]
DISPLAY = axis
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
MAX_FEED_OVERRIDE = 1.50
MAX_SPINDLE_OVERRIDE = 1.00
MIN_SPINDLE_OVERRIDE = 0.50
INTRO_GRAPHIC = linuxcnc.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/john/linuxcnc/nc_files
INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
ARCDIVISION = 64
GRIDS = 10mm 20mm 50mm 100mm 1in 2in 5in 10in
POSITION_FEEDBACK = ACTUAL
DEFAULT_LINEAR_VELOCITY = 1.00
MIN_LINEAR_VELOCITY = 0
MAX_LINEAR_VELOCITY = 3.0
DEFAULT_ANGULAR_VELOCITY = 90.00
MIN_ANGULAR_VELOCITY = 0
MAX_ANGULAR_VELOCITY = 180.00
EDITOR = mousepad
GEOMETRY = AXYZ
PYVCP = pyvcp-panel.xml

> -Original Message-
> From: Scott Harwell via Emc-users [mailto:emc-users@lists.sourceforge.net]
> Sent: March-31-21 6:24 PM
> To: Enhanced Machine Controller (EMC)
> Cc: Scott Harwell
> Subject: Re: [Emc-users] Rotary axis preview (in axis interface)
> 
>  John,
> I have it almost working. The tool still tilts, but it will display the ring, 
> and you can see what is happening.
> From my INI
> 
> [DISPLAY]
> DISPLAY = axis
> POSITION_OFFSET = RELATIVE
> POSITION_FEEDBACK = ACTUAL
> MAX_FEED_OVERRIDE = 2.00
> MAX_SPINDLE_OVERRIDE = 1.50
> MIN_SPINDLE_OVERRIDE = 0.50
> INTRO_GRAPHIC = linuxcnc.gif
> INTRO_TIME = 5
> PROGRAM_PREFIX = /home/sh/linuxcnc/nc_files
> INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
> POSITION_FEEDBACK = ACTUAL
> DEFAULT_LINEAR_VELOCITY = 0.25
> MAX_LINEAR_VELOCITY = 1.00
> MIN_LINEAR_VELOCITY = 0.016670
> DEFAULT_ANGULAR_VELOCITY = 12.00
> MAX_ANGULAR_VELOCITY = 180.00
> MIN_ANGULAR_VELOCITY = 1.67
> EDITOR = gedit
> GEOMETRY = aXYZ
> CYCLE_TIME = 100
> Excuse the speeds this is from my prototype system, no machine.
> Scott
> 
> 
> On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer 
>  wrote:
> 
>  Forgot to mention I had tried that.� I have it set to AXYZ.� The tool images 
> starts with the flat of the tool cone facing away from me.�
> I can now also see the A change briefly to say 20 and then back to zero, 
> probably due to the G92.
> 
> But it's still drawing the image as if it's in one spot.� Which in effect it 
> is since the rotary axis, in line with the X axis is turning so the
> XYZ remain the same other than Z moving into the work to cut and out to 
> retract.� X moves along the graduations and AX move to
> draw the letters.
> 
> So something else in the INI or HAL file is still confusing the system.
> 
> John
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> >
> > You need in the display section of the INI file
> >
> > GEOMETRY = AXYZ
> >
> > On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  wrote:
> >
> > >
> > > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > > >
> > > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > > >
> > > Alright, I'm confused.
> > > I've got the G-Code turning the 4th axis A.� The X moves back and forth
> > > for carving the lines as does A when letters are carved.� At 90 degrees 
> > > the
> > > conical tool image on the AXIS screen has rotated 90 degrees but the
> > > location of A is still zero on the screen as well as I don't get that
> > > circular image that Sam has.
> > > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> > >
> > > So physically the Axis is turning.� But it doesn't seem to be represented
> > > on the screen.� What could be missing?� Something in the HAL or INI file?
> > >
> > > Thanks
> > > John
> > >
> > >
> > >
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 
> ___
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> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
> 
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Re: [Emc-users] Rotary axis preview (in axis interface)

[John Dammeyer]

Thanks Scott.  Yes.  The code was changed to

#<_f> = 80
 from 
#<_feed> = 20

I tried _feed1 which also worked.

John

> -Original Message-
> From: Scott Harwell via Emc-users [mailto:emc-users@lists.sourceforge.net]
> Sent: March-31-21 7:06 PM
> To: Enhanced Machine Controller (EMC)
> Cc: Scott Harwell
> Subject: Re: [Emc-users] Rotary axis preview (in axis interface)
> 
> G-code to engrave numbers on cylinders
> 
> |
> |
> |
> |  |  |
> 
>  |
> 
>  |
> |
> |  |
> G-code to engrave numbers on cylinders
> 
> [edit 30/8/18: I added tick marks, see 
> https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-c...
>  |
> 
>  |
> 
>  |
> 
> 
> John,
> 
> The file at the bottom of page 2 works in 2.9.0. No error for "F".
> Scott
> 
> 
> 
> On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer 
>  wrote:
> 
>  Forgot to mention I had tried that.� I have it set to AXYZ.� The tool images 
> starts with the flat of the tool cone facing away from me.�
> I can now also see the A change briefly to say 20 and then back to zero, 
> probably due to the G92.
> 
> But it's still drawing the image as if it's in one spot.� Which in effect it 
> is since the rotary axis, in line with the X axis is turning so the
> XYZ remain the same other than Z moving into the work to cut and out to 
> retract.� X moves along the graduations and AX move to
> draw the letters.
> 
> So something else in the INI or HAL file is still confusing the system.
> 
> John
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> >
> > You need in the display section of the INI file
> >
> > GEOMETRY = AXYZ
> >
> > On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  wrote:
> >
> > >
> > > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > > >
> > > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > > >
> > > Alright, I'm confused.
> > > I've got the G-Code turning the 4th axis A.� The X moves back and forth
> > > for carving the lines as does A when letters are carved.� At 90 degrees 
> > > the
> > > conical tool image on the AXIS screen has rotated 90 degrees but the
> > > location of A is still zero on the screen as well as I don't get that
> > > circular image that Sam has.
> > > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> > >
> > > So physically the Axis is turning.� But it doesn't seem to be represented
> > > on the screen.� What could be missing?� Something in the HAL or INI file?
> > >
> > > Thanks
> > > John
> > >
> > >
> > >
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 
> ___
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> 
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Re: [Emc-users] Rotary axis preview (in axis interface)

[Scott Harwell via Emc-users]

 Sam,
Yahoo mail with Firefox on Debian 10.
Yes I noticed it really trashed the formatting, It didn't look like this when 
sent.

Your project is looking good. 

Scott

On Wednesday, March 31, 2021, 9:25:00 PM CDT, Sam Sokolik 
 wrote:  
 
 John - what ui are you using?

On Wed, Mar 31, 2021 at 9:08 PM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

> G-code to engrave numbers on cylinders
>
> |
> |
> |
> |  |  |
>
>  |
>
>  |
> |
> |  |
> G-code to engrave numbers on cylinders
>
> [edit 30/8/18: I added tick marks, see
> https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-c.
> ..
>  |
>
>  |
>
>  |
>
>
> John,
>
> The file at the bottom of page 2 works in 2.9.0. No error for "F".
> Scott
>
>
>
>    On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer <
> jo...@autoartisans.com> wrote:
>
>  Forgot to mention I had tried that.  I have it set to AXYZ.  The tool
> images starts with the flat of the tool cone facing away from me.  I can
> now also see the A change briefly to say 20 and then back to zero, probably
> due to the G92.
>
> But it's still drawing the image as if it's in one spot.  Which in effect
> it is since the rotary axis, in line with the X axis is turning so the XYZ
> remain the same other than Z moving into the work to cut and out to
> retract.  X moves along the graduations and AX move to draw the letters.
>
> So something else in the INI or HAL file is still confusing the system.
>
> John
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> >
> > You need in the display section of the INI file
> >
> > GEOMETRY = AXYZ
> >
> > On Wed, Mar 31, 2021, 5:00 PM John Dammeyer 
> wrote:
> >
> > >
> > > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > > >
> > >
> http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > > >
> > > Alright, I'm confused.
> > > I've got the G-Code turning the 4th axis A.  The X moves back and forth
> > > for carving the lines as does A when letters are carved.  At 90
> degrees the
> > > conical tool image on the AXIS screen has rotated 90 degrees but the
> > > location of A is still zero on the screen as well as I don't get that
> > > circular image that Sam has.
> > > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> > >
> > > So physically the Axis is turning.  But it doesn't seem to be
> represented
> > > on the screen.  What could be missing?  Something in the HAL or INI
> file?
> > >
> > > Thanks
> > > John
> > >
> > >
> > >
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
>
> ___
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>
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>

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Re: [Emc-users] Rotary axis preview (in axis interface)

[Sam Sokolik]

John - what ui are you using?

On Wed, Mar 31, 2021 at 9:08 PM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

> G-code to engrave numbers on cylinders
>
> |
> |
> |
> |  |  |
>
>  |
>
>  |
> |
> |  |
> G-code to engrave numbers on cylinders
>
> [edit 30/8/18: I added tick marks, see
> https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-c.
> ..
>  |
>
>  |
>
>  |
>
>
> John,
>
> The file at the bottom of page 2 works in 2.9.0. No error for "F".
> Scott
>
>
>
> On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer <
> jo...@autoartisans.com> wrote:
>
>  Forgot to mention I had tried that.  I have it set to AXYZ.  The tool
> images starts with the flat of the tool cone facing away from me.  I can
> now also see the A change briefly to say 20 and then back to zero, probably
> due to the G92.
>
> But it's still drawing the image as if it's in one spot.  Which in effect
> it is since the rotary axis, in line with the X axis is turning so the XYZ
> remain the same other than Z moving into the work to cut and out to
> retract.  X moves along the graduations and AX move to draw the letters.
>
> So something else in the INI or HAL file is still confusing the system.
>
> John
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> >
> > You need in the display section of the INI file
> >
> > GEOMETRY = AXYZ
> >
> > On Wed, Mar 31, 2021, 5:00 PM John Dammeyer 
> wrote:
> >
> > >
> > > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > > >
> > >
> http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > > >
> > > Alright, I'm confused.
> > > I've got the G-Code turning the 4th axis A.  The X moves back and forth
> > > for carving the lines as does A when letters are carved.  At 90
> degrees the
> > > conical tool image on the AXIS screen has rotated 90 degrees but the
> > > location of A is still zero on the screen as well as I don't get that
> > > circular image that Sam has.
> > > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> > >
> > > So physically the Axis is turning.  But it doesn't seem to be
> represented
> > > on the screen.  What could be missing?  Something in the HAL or INI
> file?
> > >
> > > Thanks
> > > John
> > >
> > >
> > >
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
>
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>
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Re: [Emc-users] Small PC for use with 7i90 / 7i96?

[Carl Giles via Emc-users]

I have had a 6CD duplicator at my church act up. 2dvd drives wouldn't work and 
it would freeze up after about a half hour of run time. Like your shop a church 
gets damp during the week. I sprayed all the contacts with DeOxit spray from 
Parts Express. I try to get contact cleaner that leaves a slight film of light 
oil behind to protect the contact area from oxygen. That duplicator has been 
working now for longer than it worked from new. I had wondered if it would work 
without capacitively loading down a processor running at 2 to 3 Ghz. It did for 
me.

On March 31, 2021 12:50:16 PM UTC, Les Newell  wrote:
>I'm a big fan of the Dell Wyse thin clients. They are available in
>large 
>quantities on the second hand market. They are fanless, low power and 
>bulletproof. I've killed several PCs in machines over the years, mainly
>
>due to the fact that my workshop is a bit damp. I've never killed a 
>Wyse. The 5020 (AKA Dx0Q) works well. Try to make sure you get the SSD 
>when you buy one. They use an odd sized short bare board SATA SSD.
>Older 
>Sandisk 64GB SSDs use this board inside a standard sized housing. It's 
>easy enough to open the housing and pull the board out. Some come with 
>built in wifi.
>If you want a bit more grunt the 5070 is now hitting the second hand 
>market. They use a SATA M.2 drive.
>
>I have the Dx0D model in my lathe and router. They work but are a
>little 
>under powered. My network server is a Dx0Q borged out with 3x2TB NVME, 
>1x6TB SATA hard drive and 1x6TB USB hard drive. It easily saturates
>it's 
>1Gb Ethernet but the whole setup including a VDSL router only pulls 25W
>
>at idle (drives spun down).
>
>The only down side I find is that they only have one Ethernet port. I 
>generally use a USB wifi dongle to access my network. On later versions
>
>of Debian/Ubuntu you also need to partition the drive manually. 
>Automatic partitioning installs a UEFI partition and locks the drive to
>
>the computer. It then won't boot if you move the drive to another
>machine.
>
>Les
>
>On 29/03/2021 19:30, Billy Huddleston wrote:
>> Looking for a small form factor PC to use.  Been a while since I've 
>> put together a new system.
>>
>> Contemplating this: https://www.amazon.com/dp/B085RZDVL5  (Has WiFi 
>> for LAN connection and onboard Ethernet for the MESA Card)
>>
>> Or perhaps a Intel NUC?  Anyone have suggestions?  What's everyone 
>> using these days?
>>
>> Thanks, Billy
>
>
>
>
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Re: [Emc-users] Rotary axis preview (in axis interface)

[Scott Harwell via Emc-users]

G-code to engrave numbers on cylinders

| 
| 
| 
|  |  |

 |

 |
| 
|  | 
G-code to engrave numbers on cylinders

[edit 30/8/18: I added tick marks, see 
https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-c...
 |

 |

 |


John,

The file at the bottom of page 2 works in 2.9.0. No error for "F".
Scott



On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer 
 wrote:  
 
 Forgot to mention I had tried that.  I have it set to AXYZ.  The tool images 
starts with the flat of the tool cone facing away from me.  I can now also see 
the A change briefly to say 20 and then back to zero, probably due to the G92.

But it's still drawing the image as if it's in one spot.  Which in effect it is 
since the rotary axis, in line with the X axis is turning so the XYZ remain the 
same other than Z moving into the work to cut and out to retract.  X moves 
along the graduations and AX move to draw the letters.

So something else in the INI or HAL file is still confusing the system.

John
> From: Sam Sokolik [mailto:samco...@gmail.com]
> 
> You need in the display section of the INI file
> 
> GEOMETRY = AXYZ
> 
> On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  wrote:
> 
> >
> > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > >
> > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > >
> > Alright, I'm confused.
> > I've got the G-Code turning the 4th axis A.  The X moves back and forth
> > for carving the lines as does A when letters are carved.  At 90 degrees the
> > conical tool image on the AXIS screen has rotated 90 degrees but the
> > location of A is still zero on the screen as well as I don't get that
> > circular image that Sam has.
> > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> >
> > So physically the Axis is turning.  But it doesn't seem to be represented
> > on the screen.  What could be missing?  Something in the HAL or INI file?
> >
> > Thanks
> > John
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> 
> ___
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Re: [Emc-users] Small PC for use with 7i90 / 7i96?

[Chris Albertson]

For MS-DOS, use a virtual machine under Linux.  Oracle's "Virtualbox" will
run DOS 6.  Virtualbox is free.

On Wed, Mar 31, 2021 at 4:43 PM Gregg Eshelman via Emc-users <
emc-users@lists.sourceforge.net> wrote:

> I'm looking for something like that which can run MS-DOS and has a
> contiguous 64K upper memory region free or four 16K regions free to work
> with LIM EMS 4.0. The problem I run into with newer hardware is the UMA is
> so chunked up with areas reserved for all the built in peripherals, and
> disabling them in BIOS usually doesn't free up space in the UMA.
> My old ProLight 2000 mill uses old DOS software that only works with EMS
> as a place to load gcode. The software must predate the 80386 and they
> didn't want to be one of the few programs using the extended memory
> capabilities of the 80286, or use something like DOS4GW or another 3rd
> party "DOS Extender" to access additional RAM. I've run it off a laptop
> booted from a USB 1.44M floppy. Have to use the gcode file splitter utility
> that's with the mill software to chunk it into pieces that fit into low
> memory after DOS and the PLM2000 software take their parts. The splitter
> puts a command at the end of each chunk to load the next chunk.
>


Chris Albertson
Redondo Beach, California

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Re: [Emc-users] Rotary axis preview (in axis interface)

[Scott Harwell via Emc-users]

 John,
I have it almost working. The tool still tilts, but it will display the ring, 
and you can see what is happening.
From my INI

[DISPLAY]
DISPLAY = axis
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
MAX_FEED_OVERRIDE = 2.00
MAX_SPINDLE_OVERRIDE = 1.50
MIN_SPINDLE_OVERRIDE = 0.50
INTRO_GRAPHIC = linuxcnc.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/sh/linuxcnc/nc_files
INCREMENTS = .1in .05in .01in .005in .001in .0005in .0001in
POSITION_FEEDBACK = ACTUAL
DEFAULT_LINEAR_VELOCITY = 0.25
MAX_LINEAR_VELOCITY = 1.00
MIN_LINEAR_VELOCITY = 0.016670
DEFAULT_ANGULAR_VELOCITY = 12.00
MAX_ANGULAR_VELOCITY = 180.00
MIN_ANGULAR_VELOCITY = 1.67
EDITOR = gedit
GEOMETRY = aXYZ
CYCLE_TIME = 100
Excuse the speeds this is from my prototype system, no machine.
Scott


On Wednesday, March 31, 2021, 5:19:05 PM CDT, John Dammeyer 
 wrote:  
 
 Forgot to mention I had tried that.  I have it set to AXYZ.  The tool images 
starts with the flat of the tool cone facing away from me.  I can now also see 
the A change briefly to say 20 and then back to zero, probably due to the G92.

But it's still drawing the image as if it's in one spot.  Which in effect it is 
since the rotary axis, in line with the X axis is turning so the XYZ remain the 
same other than Z moving into the work to cut and out to retract.  X moves 
along the graduations and AX move to draw the letters.

So something else in the INI or HAL file is still confusing the system.

John
> From: Sam Sokolik [mailto:samco...@gmail.com]
> 
> You need in the display section of the INI file
> 
> GEOMETRY = AXYZ
> 
> On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  wrote:
> 
> >
> > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > >
> > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > >
> > Alright, I'm confused.
> > I've got the G-Code turning the 4th axis A.  The X moves back and forth
> > for carving the lines as does A when letters are carved.  At 90 degrees the
> > conical tool image on the AXIS screen has rotated 90 degrees but the
> > location of A is still zero on the screen as well as I don't get that
> > circular image that Sam has.
> > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> >
> > So physically the Axis is turning.  But it doesn't seem to be represented
> > on the screen.  What could be missing?  Something in the HAL or INI file?
> >
> > Thanks
> > John
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> 
> ___
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Re: [Emc-users] Spindle rps and index

[andy pugh]

On Thu, 1 Apr 2021 at 00:54, Karl Schmidt  wrote:

The names of these pins seem to have changed..


Good point. It's an SVG, so the changes can be made with a text editor and
find/replace. motion.spindle- to spindle.0.
(in most cases).

It is probably possible to pass the .svg through the regex search/replace
here:
https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/ini/update_ini.py#L515

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

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Re: [Emc-users] Spindle rps and index

[Karl Schmidt]

On 3/19/21 4:53 AM, andy pugh wrote:

Here is a schematic of a typical LinuxCNC spindle orient setup:
https://wiki.linuxcnc.org/uploads/orient.svg


The names of these pins seem to have changed..

For instance - there is no motion.spindle-on - must be spindle.0.on

I'm going to edit this up if anyone is interested.

Could be that the dual PID's/orient/mux/abs should eventually be built in to an 
orienting PID?


--

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3209 West 9th Street Ph (785) 979-8397
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Re: [Emc-users] Small PC for use with 7i90 / 7i96?

[Gregg Eshelman via Emc-users]

I'm looking for something like that which can run MS-DOS and has a contiguous 
64K upper memory region free or four 16K regions free to work with LIM EMS 4.0. 
The problem I run into with newer hardware is the UMA is so chunked up with 
areas reserved for all the built in peripherals, and disabling them in BIOS 
usually doesn't free up space in the UMA.
My old ProLight 2000 mill uses old DOS software that only works with EMS as a 
place to load gcode. The software must predate the 80386 and they didn't want 
to be one of the few programs using the extended memory capabilities of the 
80286, or use something like DOS4GW or another 3rd party "DOS Extender" to 
access additional RAM. I've run it off a laptop booted from a USB 1.44M floppy. 
Have to use the gcode file splitter utility that's with the mill software to 
chunk it into pieces that fit into low memory after DOS and the PLM2000 
software take their parts. The splitter puts a command at the end of each chunk 
to load the next chunk.

I have all the technical info and some setup/configuration software for the 
Animatics servo controller but nobody is interested in adding support to LCNC. 
Basically it streams gcode out by serial and listens for ack and things like 
hitting an end stop, monitoring the position encoders, and things that will 
cause it to stop the machine such as detecting too much torque on the spindle 
or servos. Curiously it is not equipped with spindle RPM sense, it just assumes 
it's running at the commanded RPM.
What would be very nice is to be able to dump gcode into however much onboard 
RAM is in the Animatics controller then connect a repeat cycle button to the 
mill. Wouldn't be able to do very complicated things but it would be ideal for 
simpler jobs like drilling a few holes in a lot of identical parts.

The controller can do it but the feature was never utilized by ProLight and 
Intellitek completely ignored the model 2000, apparently just sold them until 
running out of inventory. Windows software was made for the stepper motor model 
1000 but not the servo motor 2000.

On Wednesday, March 31, 2021, 7:09:06 AM MDT, Les Newell 
 wrote:  
 
 I'm a big fan of the Dell Wyse thin clients. They are available in large 
quantities on the second hand market. They are fanless, low power and 
bulletproof. I've killed several PCs in machines over the years, mainly 
due to the fact that my workshop is a bit damp. I've never killed a 
Wyse. The 5020 (AKA Dx0Q) works well. Try to make sure you get the SSD 
when you buy one. They use an odd sized short bare board SATA SSD. Older 
Sandisk 64GB SSDs use this board inside a standard sized housing. It's 
easy enough to open the housing and pull the board out. Some come with 
built in wifi.
If you want a bit more grunt the 5070 is now hitting the second hand 
market. They use a SATA M.2 drive.

I have the Dx0D model in my lathe and router. They work but are a little 
under powered. My network server is a Dx0Q borged out with 3x2TB NVME, 
1x6TB SATA hard drive and 1x6TB USB hard drive. It easily saturates it's 
1Gb Ethernet but the whole setup including a VDSL router only pulls 25W 
at idle (drives spun down).

The only down side I find is that they only have one Ethernet port. I 
generally use a USB wifi dongle to access my network. On later versions 
of Debian/Ubuntu you also need to partition the drive manually. 
Automatic partitioning installs a UEFI partition and locks the drive to 
the computer. It then won't boot if you move the drive to another machine.

Les  
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Re: [Emc-users] Rotary axis preview (in axis interface)

[John Dammeyer]

Forgot to mention I had tried that.  I have it set to AXYZ.  The tool images 
starts with the flat of the tool cone facing away from me.  I can now also see 
the A change briefly to say 20 and then back to zero, probably due to the G92.

But it's still drawing the image as if it's in one spot.  Which in effect it is 
since the rotary axis, in line with the X axis is turning so the XYZ remain the 
same other than Z moving into the work to cut and out to retract.  X moves 
along the graduations and AX move to draw the letters.

So something else in the INI or HAL file is still confusing the system.

John
> From: Sam Sokolik [mailto:samco...@gmail.com]
> 
> You need in the display section of the INI file
> 
> GEOMETRY = AXYZ
> 
> On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  wrote:
> 
> >
> > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > >
> > http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> > >
> > Alright, I'm confused.
> > I've got the G-Code turning the 4th axis A.  The X moves back and forth
> > for carving the lines as does A when letters are carved.  At 90 degrees the
> > conical tool image on the AXIS screen has rotated 90 degrees but the
> > location of A is still zero on the screen as well as I don't get that
> > circular image that Sam has.
> > http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
> >
> > So physically the Axis is turning.  But it doesn't seem to be represented
> > on the screen.  What could be missing?  Something in the HAL or INI file?
> >
> > Thanks
> > John
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> 
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Re: [Emc-users] Rotary axis preview (in axis interface)

[Sam Sokolik]

You need in the display section of the INI file

GEOMETRY = AXYZ

On Wed, Mar 31, 2021, 5:00 PM John Dammeyer  wrote:

>
> > From: Sam Sokolik [mailto:samco...@gmail.com]
> >
> http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> >
> Alright, I'm confused.
> I've got the G-Code turning the 4th axis A.  The X moves back and forth
> for carving the lines as does A when letters are carved.  At 90 degrees the
> conical tool image on the AXIS screen has rotated 90 degrees but the
> location of A is still zero on the screen as well as I don't get that
> circular image that Sam has.
> http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png
>
> So physically the Axis is turning.  But it doesn't seem to be represented
> on the screen.  What could be missing?  Something in the HAL or INI file?
>
> Thanks
> John
>
>
>
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Re: [Emc-users] Rotary axis preview (in axis interface)

[John Dammeyer]

> From: Sam Sokolik [mailto:samco...@gmail.com]
> http://electronicsam.com/images/greenmachine/Screenshot_2021-03-30_18-00-14.png
> 
Alright, I'm confused.
I've got the G-Code turning the 4th axis A.  The X moves back and forth for 
carving the lines as does A when letters are carved.  At 90 degrees the conical 
tool image on the AXIS screen has rotated 90 degrees but the location of A is 
still zero on the screen as well as I don't get that circular image that Sam 
has.
http://www.autoartisans.com/mill/Screenshot_2021-03-31_14-22-48.png

So physically the Axis is turning.  But it doesn't seem to be represented on 
the screen.  What could be missing?  Something in the HAL or INI file?

Thanks
John



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Re: [Emc-users] experimental bearings for harmonic drive

[Gene Heskett]

On Wednesday 31 March 2021 16:38:33 Karl Schmidt wrote:

> On 3/28/21 11:52 AM, John Dammeyer wrote:
> > A friend has told me he's had PETG stick so well that it breaks off
> > some of the glass build plate.  Seems a bit extreme but that's what
> > he's reported.
>
> Never thought I would use my 3D printer as much as I do. I've also
> broken glass plates with PETG and nylon sticking too well (pulls out
> bits of glass) - I get mirror tiles to print on - very inexpensive,
> but I still don't want to break them...
>
> The key I've found is getting the glass perfectly clean - (A-IPA with
> a chem-wipe should squeak) excellent for PLA - but other plastics can
> stick too well or not well enough - so for those I use Elmers glue
> stick - it breaks instead of the glass - the problem is getting 
> complete and consistent coverage. Supposed to be made of an acrylic
> polymer - wish I could find it as a spray.
>
So do I.

> I've printed gaskets using TBU - and used several nylon types - I've
> found Nylon-X to be amazingly strong - (a bit pricey - but printing
> something that is brittle isn't cheap in the long run) These days I
> use nylonX unless there is a good reason not to.. ( I use a vacuum
> chamber to dry filament - even PLA - makes a lot of difference).

I have an evacuation pump, but not a ready chamber big enough or strong 
enough to put a spool in. I'll investigate some big pvc pipe. Maybe that 
would work if 8" will take a spool.  If I can find caps I can o-ring 
seal. I dried a soggy hunk of maple that way for a gunstock 13 years 
ago, but had to glue the caps on keeping it better than 27" hg below 
atmosphere for about a year. Most stable piece of wood I ever carved, 
plain straight grained stuff with cherry trim.  Thumbhole style holding 
up a cheap TC 50 cal BP rifle, gets the ooohs and ahhs at the range when 
I drag it out.  Also does 1.25" 5 shot groups at 50 yards too. Pretty 
good for a $200 gun 25 years ago, with my mods of course. :)

And a 16GB stick of ddr4 ram was just found on a chair beside the front 
door, so I guess I shut down and find out if it works alongside the one 
in it.

Thanks, a bunch.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] experimental bearings for harmonic drive

[Karl Schmidt]

On 3/28/21 11:52 AM, John Dammeyer wrote:


A friend has told me he's had PETG stick so well that it breaks off some of the 
glass build plate.  Seems a bit extreme but that's what he's reported.



Never thought I would use my 3D printer as much as I do. I've also broken glass plates with PETG and nylon sticking too 
well (pulls out bits of glass) - I get mirror tiles to print on - very inexpensive, but I still don't want to break them...


The key I've found is getting the glass perfectly clean - (A-IPA with a chem-wipe should squeak) excellent for PLA - but 
other plastics can stick too well or not well enough - so for those I use Elmers glue stick - it breaks instead of the 
glass - the problem is getting  complete and consistent coverage. Supposed to be made of an acrylic polymer - wish I 
could find it as a spray.


I've printed gaskets using TBU - and used several nylon types - I've found Nylon-X to be amazingly strong - (a bit 
pricey - but printing something that is brittle isn't cheap in the long run) These days I use nylonX unless there is a 
good reason not to.. ( I use a vacuum chamber to dry filament - even PLA - makes a lot of difference).



--

Karl Schmidt  EMail k...@lrak.net
3209 West 9th Street Ph (785) 979-8397
Lawrence, KS 66049



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Re: [Emc-users] experimental bearings for harmonic drive

[Gene Heskett]

On Wednesday 31 March 2021 13:39:19 Gene Heskett wrote:

> On Wednesday 31 March 2021 04:38:19 andy pugh wrote:
> > On Wed, 31 Mar 2021 at 03:40, Gene Heskett 
>
> wrote:
> > > the global flow to 80%, it laid a brim so-so with the head gap
> > > reduced by .1mm, and I went back up to 80C/245C, but 4 layers up
> > > its still slobbering and laying extra plastic that looks like
> > > snow.
>
> Thats history, I did a factoy reset, with a new nozzle, reset cura to
> defaults except extra walls, and successfuuly built my busted math
> version I just posted about.
>
> > The bed temp and extrude temp seem high. I do PETG at 65 / 230 and
> > PLA at 65 / 190.
>
> I'll likely get down to that, its the recommended for PETG, which I've
> found high, 70C bed and 234C nozzle in previous successfull runs. 
> With BuildTak on the glass, I expect 65C/232C to work. And be easier
> to remove. Print cooling on the dremel is extremely well done, and
> while I have that fan started at layer 2 and 40% they recommend only
> 30%.  We'll see.
>
> I'll likely have to adjust something as I doubt the build underway now
> will be final.

Its not, bb channel still too tight, but I also found two rotate commands 
that were superfolous and removed them, so maybe the render time will 
lowered somewhat. Somewhat? Huge, from over an hour to just under 14 
minutes!

> And finally, something it sticks to, buildtak sheet. 
> Sticks really well at 80/250 so the next build will try 70/240.
> The 80/250 build was a mite bumpy. But cleaned up and full of bb's to
> only about 1.5" of empty space as I used a .02mm small spec for the
> bearing track bb size, which is too much preload, so this build
> underway is building with the exact measurement. But I fully expect to
> have to fine tune yet another copy after this one, probably the ID so
> it fits the drives spline rings more exactly, and an adjustment of the
> dummy bb size to get a best fit.
>
> > Is it possible that the filament is damp? Has it been left out in
> > the atmosphere for weeks?
>
> Unsealed from a vacuum packed bag Sunday, so it should be pretty dry
> yet. So I now have one nearly empty spool of this odd size, and this
> one to use up yet. If I build a third, the nearly empty spool will get
> finished. The dremel claims it will pause and wait if it runs out mid
> build. I've no clue how it does that but the upper guide feeding the
> head mounted ejector, has a 3 conductor cable coming out of the bottom
> of its plastic molding.  And I've most of a roll of green PETG left on
> the ender that I'll probably put in the oven for a few hours before I
> rewind it on a dremel spool.
>
> Cheers, Gene Heskett


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


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Re: [Emc-users] Rotary axis preview (in axis interface)

[johnd]

I changed it to _feed1 and then the program ran. Info output at 10, 20, 30..  
Looks like it carves the numbers first.   Rotary axis does appear to move 10 
degrees for each info message. Screen output a bit strange. Metric maybe?On 
doggy walk.  Will check further when I get back. ThanksJohnSent from my Samsung 
S10
 Original message From: Sam Sokolik  Date: 
2021-03-31  9:59 a.m.  (GMT-08:00) To: "Enhanced Machine Controller (EMC)" 
 Subject: Re: [Emc-users] Rotary axis preview 
(in axis interface) I think you grabbed the old version - at the top of the 
post he has a linkto the end of the post...  
:)https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-cylinders?start=10#116888Maybe
 <_feed> wasn't used the way it is now in 2018  It now seems to bea read 
only variable for current feed setting.On Wed, Mar 31, 2021 at 11:35 AM John 
Dammeyer wrote:> Let me ask this question again with a 
bit more information.>> I downloaded the G-Code for the scale and Linux fails 
with "cannot assign> read only parameter" on the #=20 line.  It made it 
through the rest> first few assignments.  I looked at the file with and the 
lines are only> terminated with a 0x0A.  No odd characters in the file.  What 
could be> wrong?>> Thanks> John>> ;Attempt to engrave scale rings> ;Engraving 
is done in the XA plane and in the postive direction from X =0>> #<_dia> = 50 ; 
scale diamter> #<_depth> = 0.2 ; engraving depth> #<_height> = 2 ; character 
height> #<_scale> = 1 ; unit conversion> #<_inc> = 10 ; angle between marks> 
#<_feed> = 20>> G21>> F #<_feed>> 
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Re: [Emc-users] experimental bearings for harmonic drive

[Gene Heskett]

On Wednesday 31 March 2021 04:38:19 andy pugh wrote:

> On Wed, 31 Mar 2021 at 03:40, Gene Heskett  
wrote:
> > the global flow to 80%, it laid a brim so-so with the head gap
> > reduced by .1mm, and I went back up to 80C/245C, but 4 layers up its
> > still slobbering and laying extra plastic that looks like snow.

Thats history, I did a factoy reset, with a new nozzle, reset cura to 
defaults except extra walls, and successfuuly built my busted math 
version I just posted about.

> The bed temp and extrude temp seem high. I do PETG at 65 / 230 and PLA
> at 65 / 190.

I'll likely get down to that, its the recommended for PETG, which I've 
found high, 70C bed and 234C nozzle in previous successfull runs.  With 
BuildTak on the glass, I expect 65C/232C to work. And be easier to 
remove. Print cooling on the dremel is extremely well done, and while I 
have that fan started at layer 2 and 40% they recommend only 30%.  We'll
see.

I'll likely have to adjust something as I doubt the build underway now 
will be final.  And finally, something it sticks to, buildtak sheet. 
Sticks really well at 80/250 so the next build will try 70/240.
The 80/250 build was a mite bumpy. But cleaned up and full of bb's to 
only about 1.5" of empty space as I used a .02mm small spec for the 
bearing track bb size, which is too much preload, so this build underway 
is building with the exact measurement. But I fully expect to have to 
fine tune yet another copy after this one, probably the ID so it fits 
the drives spline rings more exactly, and an adjustment of the dummy bb 
size to get a best fit.

> Is it possible that the filament is damp? Has it been left out in the
> atmosphere for weeks?

Unsealed from a vacuum packed bag Sunday, so it should be pretty dry yet. 
So I now have one nearly empty spool of this odd size, and this one to 
use up yet. If I build a third, the nearly empty spool will get 
finished. The dremel claims it will pause and wait if it runs out mid 
build. I've no clue how it does that but the upper guide feeding the 
head mounted ejector, has a 3 conductor cable coming out of the bottom 
of its plastic molding.  And I've most of a roll of green PETG left on 
the ender that I'll probably put in the oven for a few hours before I 
rewind it on a dremel spool.

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


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Re: [Emc-users] Internal Gears

[Chris Albertson]

I was asking how to cut ring gears because, As we can see in that link,
comercial internal gears cost $60 to $120 each and I'd need more then a
dozen of them.   I was looking at a few different gear reduction systems
and one of the designs needed ring gears.  Belt reducers and cycloidal
drives were other options.   Every year or so I try and find a new way to
make something like a knee joint for a walking robot and see if the price,
power, speed and bulk is acceptable.It is getting much better but still
this is a huge design challenge.

cycloidal drives, look the best to me now.

On Wed, Mar 31, 2021 at 7:03 AM  wrote:

> I believe that someone on this list was recently looking for small internal
> gears. A large selection is available for semi-reasonable prices at
> https://qtcgears.com/products/internalgears.php I have no connection with
> this company nor any knowledge of the quality of their products. Google
> found them while I was looking for something else.
>
>
>
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-- 

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] Rotary axis preview (in axis interface)

[Sam Sokolik]

I think you grabbed the old version - at the top of the post he has a link
to the end of the post...  :)

https://forum.linuxcnc.org/20-g-code/27169-g-code-to-engrave-numbers-on-cylinders?start=10#116888

Maybe <_feed> wasn't used the way it is now in 2018  It now seems to be
a read only variable for current feed setting.

On Wed, Mar 31, 2021 at 11:35 AM John Dammeyer 
wrote:

> Let me ask this question again with a bit more information.
>
> I downloaded the G-Code for the scale and Linux fails with "cannot assign
> read only parameter" on the #=20 line.  It made it through the rest
> first few assignments.  I looked at the file with and the lines are only
> terminated with a 0x0A.  No odd characters in the file.  What could be
> wrong?
>
> Thanks
> John
>
> ;Attempt to engrave scale rings
> ;Engraving is done in the XA plane and in the postive direction from X =0
>
> #<_dia> = 50 ; scale diamter
> #<_depth> = 0.2 ; engraving depth
> #<_height> = 2 ; character height
> #<_scale> = 1 ; unit conversion
> #<_inc> = 10 ; angle between marks
> #<_feed> = 20
>
> G21
>
> F #<_feed>
>
>
>
>
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Re: [Emc-users] experimental bearings for harmonic drive

[Gene Heskett]

On Tuesday 30 March 2021 22:37:47 Gene Heskett wrote:

Success, sorta. I did a factory reset on the dremel, then put the 
nozzle .2mm closer to the BuikldTak I'd put on the glass, put a new 
hardened steel nozzle it it and put the top cover back on the head.

Reset cura for 100% flow and 10 mm faster speed. Basicly back to square 
one Did a guided fine tune of head gap for almost none since cura thinks 
the first layer is only .05mm high.  

Fired off a test print and went to bed. This morning I had to sharpen my 
putty knife again so I could get under the brim, which was stuck damned 
tight to the buildtak, and several minutes later had it in hand. Looked 
skinny for something that was supposed to be 9.5mm tall, but wasn't, 
only 6 something. Math error on my part, changed src code to fix that, 
made the bb channel a little bigger as the .01mm preload was too much, 
150 stuffed into this one isn't quite full and is way too much drag, and 
openscad is rendering the new version now.  About an hour, maybe more.

Progress, as the old man learns openscad. But at least I've got something 
that doesn't work very well, but looks like a bearing anyway. And I just 
started it again after fixing my math, this one should be pretty close 
of a usable, final copy. My math error was in useing a cylinder{, $fn=4) 
to generate a square as the tips of the corner are the diameter of the 
circle. Ooopps. And I think the cube renders faster, it was a bit under 
an hour to render to an .stl to feed cura. All that from 27 lines 
of .scad. :) If only openscad had a buffer for the basic render, and 
could then build the output with the for loop only copying and rotating 
that image into the final buffer, but it has to regenerate all of that 
360 times to get a one degree output resolution.  And it wouldn't hurt 
if it was multithreaded, cura is and quickly runs all 6 cores of this i5 
into the 65C territory.

And I just screwed up, and it looks like I'll have to build the 4th of 
those Dells I bought in order to get a Buster install to run the latest 
AppImage, it won't run with my stretch's libc-2.24 needs 25 or 27.

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


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Re: [Emc-users] Rotary axis preview (in axis interface)

[John Dammeyer]

Let me ask this question again with a bit more information.

I downloaded the G-Code for the scale and Linux fails with "cannot assign read 
only parameter" on the #=20 line.  It made it through the rest first few 
assignments.  I looked at the file with and the lines are only terminated with 
a 0x0A.  No odd characters in the file.  What could be wrong?

Thanks 
John

;Attempt to engrave scale rings
;Engraving is done in the XA plane and in the postive direction from X =0

#<_dia> = 50 ; scale diamter
#<_depth> = 0.2 ; engraving depth
#<_height> = 2 ; character height
#<_scale> = 1 ; unit conversion
#<_inc> = 10 ; angle between marks
#<_feed> = 20

G21

F #<_feed>




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Re: [Emc-users] Small PC for use with 7i90 / 7i96?

[Dave Cole]

Chris,
How many 3 1/2" drive bays do these have?

A lot of the HP PCs were very well made.   I've worked on some that have 
been running industrial software for 10+ years non stop running Windows 
XP and they are just now dying.    One plant I was at bought a bunch of 
refurbs just to use as spares running the same Windows XP based 
software!   Updating the software is very expensive compared to the 
hardware, so they just bought a large amount of hardware to swap out 
over the next 10 years or so.    By the time all of the hardware dies, 
most of them will be retired!


I suspect this is fairly common in mature manufacturing plants.



On 3/30/2021 1:31 PM, Chris Albertson wrote:

On Tue, Mar 30, 2021 at 9:51 AM Martin Dobbins  wrote:


Looking for a small form factor PC to use.  Been a while since I've put

together a new system.


https://www.amazon.com/dp/B085RZDVL5


But for $50 more Newegg will sell you a much more powerful complete
computer.
www.newegg.com/hp-elite-8200-...


I buy these and keep the Windows installation but move it into a virtual
machine that runs under Linux.   So if I ever do need Windows I can run it
inside a VM.  These machines are powerful enough to do that well enough.
   The price is low enough that it's not worth buying parts.




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[Emc-users] Internal Gears

[ken.strauss]

I believe that someone on this list was recently looking for small internal
gears. A large selection is available for semi-reasonable prices at
https://qtcgears.com/products/internalgears.php I have no connection with
this company nor any knowledge of the quality of their products. Google
found them while I was looking for something else.



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Re: [Emc-users] Rotary axis preview (in axis interface)

[Thaddeus Waldner]

Just to add another point of view:
Okuma controllers do the same thing in C-axis machining on a lathe; the 
backplot is stationary while the tool rotates.

> On Mar 30, 2021, at 6:04 PM, Sam Sokolik  wrote:
> 
>  I think I have tried all compinations -
> but the tool seems to move around the gcode - instead of the gcode moving
> around the tool...


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Re: [Emc-users] Rotary axis preview (in axis interface)

[Sam Sokolik]

I guess linuxcnc would need to know in machine coordinates where the center
of rotation is..   Could this be done with kins?  Then (thinking out loud
Don't yell at me)

The Geometry line could have another attribute for each letter...   Now
there is order and sign..  Maybe capital vs small letter

Ie

GEOMETRY = aXYZ  (lower case would designate that the gcode preview would
rotate instead of the tool tip...)

SMOP right?  ;)

sam


On Tue, Mar 30, 2021 at 9:13 PM Gene Heskett  wrote:

> On Tuesday 30 March 2021 19:35:40 John Dammeyer wrote:
>
> > Photo yes.  No G Code if that was supposed to be attached.  I find
> > when I run the CAM simulation on VisualCAM (AlibreCAM) that the tool
> > moves around the work piece rather than the work piece image rotating.
> >  If that's what you meant. If you attach the G-Code I can try it here
> > on my A axis.
> > John
>
> Both the link and the photo arrived here ok.  And thats the same as I get
> here, the tool points at the centerline of the X axis and rotates around
> that imaginary point. I've gotten more or less used to it, but its not
> natural to to me either,
>
> As for the question, I've always treated it independently as I've mounted
> my little 4" table I motorized all 3 ways, On both mills but it has
> always been XYZA in the .ini file as I rarely have made a simultaneos
> move. I just drove it to where I wanted it, like in 90 degree jumps when
> I was making tap hats, drilling and tapping 4 holes for 4 grub screws to
> grab the flats of a tap. I did do a circular engrave once but was not
> impressed with the font and didn't waste any more material. So I can't
> offer any magic incantations, sorry.
>
> > > -Original Message-
> > > From: Sam Sokolik [mailto:samco...@gmail.com]
> > > Sent: March-30-21 4:05 PM
> > > To: Enhanced Machine Controller (EMC)
> > > Subject: [Emc-users] Rotary axis preview (in axis interface)
> > >
> > > Has anyone done work on the preview for a 4th axis mounted on the
> > > table? I feel like in this situation - the gcode preview should be
> > > spinning while the tool tip stay stationary...  Uless I have the
> > > geometry set wrong - but currently I have it set to AXYZ.  I think I
> > > have tried all compinations - but the tool seems to move around the
> > > gcode - instead of the gcode moving around the tool...
> > >
> > > http://electronicsam.com/images/greenmachine/IMG_20210329_220745.jpg
> > >
> > > sam
> > >
> > > let me know if the attachment comes through...
> >
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>
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> If we desire respect for the law, we must first make the law respectable.
>  - Louis D. Brandeis
> Genes Web page 
>
>
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Re: [Emc-users] Small PC for use with 7i90 / 7i96?

[Les Newell]

I'm a big fan of the Dell Wyse thin clients. They are available in large 
quantities on the second hand market. They are fanless, low power and 
bulletproof. I've killed several PCs in machines over the years, mainly 
due to the fact that my workshop is a bit damp. I've never killed a 
Wyse. The 5020 (AKA Dx0Q) works well. Try to make sure you get the SSD 
when you buy one. They use an odd sized short bare board SATA SSD. Older 
Sandisk 64GB SSDs use this board inside a standard sized housing. It's 
easy enough to open the housing and pull the board out. Some come with 
built in wifi.
If you want a bit more grunt the 5070 is now hitting the second hand 
market. They use a SATA M.2 drive.


I have the Dx0D model in my lathe and router. They work but are a little 
under powered. My network server is a Dx0Q borged out with 3x2TB NVME, 
1x6TB SATA hard drive and 1x6TB USB hard drive. It easily saturates it's 
1Gb Ethernet but the whole setup including a VDSL router only pulls 25W 
at idle (drives spun down).


The only down side I find is that they only have one Ethernet port. I 
generally use a USB wifi dongle to access my network. On later versions 
of Debian/Ubuntu you also need to partition the drive manually. 
Automatic partitioning installs a UEFI partition and locks the drive to 
the computer. It then won't boot if you move the drive to another machine.


Les

On 29/03/2021 19:30, Billy Huddleston wrote:
Looking for a small form factor PC to use.  Been a while since I've 
put together a new system.


Contemplating this: https://www.amazon.com/dp/B085RZDVL5  (Has WiFi 
for LAN connection and onboard Ethernet for the MESA Card)


Or perhaps a Intel NUC?  Anyone have suggestions?  What's everyone 
using these days?


Thanks, Billy





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Re: [Emc-users] experimental bearings for harmonic drive

[andy pugh]

On Wed, 31 Mar 2021 at 03:40, Gene Heskett  wrote:

> the global flow to 80%, it laid a brim so-so with the head gap reduced
> by .1mm, and I went back up to 80C/245C, but 4 layers up its still
> slobbering and laying extra plastic that looks like snow.

The bed temp and extrude temp seem high. I do PETG at 65 / 230 and PLA
at 65 / 190.

Is it possible that the filament is damp? Has it been left out in the
atmosphere for weeks?

-- 
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] experimental bearings for harmonic drive

[andy pugh]

On Wed, 31 Mar 2021 at 02:36, Chris Albertson  wrote:
>
> In fusion I'd make the bearing racers by first making the solid donut parts
> then placing a slightly uoversize disk inside the metal

I model bearings in Fusion pretty regularly.

1) Create a sketch
2) "L" for line, click on "centreline" in the floating window, draw a
line from the origin vertically upwards.
3) Draw a rectangle to the right of the line.
4) Dimension the inner and outer edges from the centreline. Fusion now
automatically makes that a diameter measurement.
5) Dimension the bearing width.
6) "L" for line, draw a vertical line from the midpoint of the top
horizontal to the midpoint of the bottom one. Add a sketch point at
the midpoint of this line.
7) Hover over the bearing width to find what it is called (d33 or similar).
8) "C" for circle, draw a circle centred on the middle point created
in (6). Enter "d33 * 0.7" as the diameter. (or whatever the dimension
in (7) was called.
9) Draw two vertical lines from top to bottom of the rectangle,
clipping the circle.
10) "T" for trim the portion of those lines inside the circle.
11) Put an "=" constraint between all 4 line segments. Dimension the
gap between them to some proportion of the circle diameter that looks
right.

We now have the basic geometry of all the parts of the bearing other
than the cage. I haven't modelled a cage yet...

12) Revolve tool, revolve the inner and outer race profiles around the
bearing axis line.
13) Revolve tool, revolve _half_ of the centre circle around the
vertical line through the circle.

We now have a bearing with two races and one ball.

14) Circular array tool, make an array of balls around the bearing
axis, adjusting the quantity until it looks right.

-- 
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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