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  • rodw
  • rodw's Avatar
Today 08:32

Livestream Discussing LinuxCNC and MTConnect 27 July 2026 11:00am GMT+10

Category: Off Topic and Test Posts

Yeh, come along and we'll find out together. Dated ot not, adoption by Mazac, Siemens, Fanuc et al does give a platform for industry. BUt collection of data for statistical evaluation is saving some plants a lot of money by preventing unscheduled failures when for example an increase in motor torque is reported. In one case downtime was $1.7m per hour if the plant had a shut down.  
  • rodw
  • rodw's Avatar
Today 08:26

Gantry oxyfuel / plasma type machine from scratch

Category: General LinuxCNC Questions

LinuxCNC will run on VirtualBox and so on and this is handy to do basic testing and configuration. There is a limit on what can be done on a sim without real hardware.
  • rodw
  • rodw's Avatar
Today 08:21

using linuxcnc on a raspberry pi to control a boxford 250pc lathe

Category: General LinuxCNC Questions

The Pi4b was marginal, sometimes requiring a slower servo thread but one guy I know says the Pi5 is flawless on real machines
I'd probably pair it with a mesa ethernet card. A Mesa 7i76eU has 5 axes, 16 outputs and 32 inputs but is extensible beyond that.
Linuxcnc supports 9 axes and 32 motors
Arduino is not useful for linuxcnc
There are several GUIs that support lathes but its always best to start with axis until you get everything functional.
Of course we are friendly!
You can mess with everything!
Check the docs as they list the GUI's available but you can write your own. Some support portrait mode.
I checked the other day, there's is over 1800 pages of docs but I always refer to the online docs.
There are no limits to motor size and it will control Ethercat and analog servo motors not just step and direction.
Linuxcnc is far more flexible than Centroid and is complete as opposed to Centroid where additional upgrades are required.
But it may require more effort from you  because there are probably more decisions you need to make becsause of LinuxCNC's flexibility

Re Youtube not sure on Lathe specific videos but I have a channel which is trying to produce tutorial type material.
This one is designed to be a general introduction describing the various pathways through Linuxcnc 


I'm currently working through a series of videos building a control panel from scratch using a parallel port (3rd one to be released tonight) with a couple more planned. Once fully functional, my plan was to replace the parallel port with other controller options. Sounds like I need to include a lathe walkthrough too!



 
  • rodw
  • rodw's Avatar
Today 07:55
  • galmiklos
  • galmiklos
Yesterday 03:33

"Probe Height of the current tool" button not active in versatool

Category: Qtvcp

What is "the auto tool probe remap"? I mean I know what remap is in general, but it sounds like it is a name of something specific. Is it something one can download from somewhere? A quick googling didn't come back with anything specific.

In the meantime I studied the documentation and the source code a little bit, and I think I now have a clue what's what, and there are multiple ways to achieve tool offsets (G10 L2 vs. G10 L20 for instance). What I was looking for was a simple way and a sequence of click here, enter there kind of set of instructions.

I eventually managed to make the standard tool touchup work. The one where you enter the the tool height in the settings tab, enter the workpiece height in the offsets panel on the main screen, and you just click on the tool sensor button, which will calculate the Z value for the current WCS and sets it with G10 L20 (after touching the sensor with the loaded tool).
  • dlv
  • dlv
Yesterday 21:35

apt update error: "no longer has a Release file"

Category: General LinuxCNC Questions

Tried again and now thinking some kind of network error.  Will try again later.
 502  Bad Gateway [IP: 54.37.56.77 443]
137 packages can be upgraded. Run 'apt list --upgradable' to see them.
Warning: Failed to fetch http://repository.qtpyvcp.com/apt/dists/develop/InRelease  502  Bad Gateway [IP: 54.37.56.77 443]
Warning: Some index files failed to download. They have been ignored, or old ones used instead.
cnc@linuxCNC:~/Desktop/test_plasma_1$ 
  • RLA
  • RLA
Yesterday 21:30
Replied by RLA on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

Seems likely since that was common on 2 pc's....Did not try live yet...found another hard drive..Thanks!
  • RLA
  • RLA
Yesterday 21:27
Replied by RLA on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

Not at shop now but pretty sure it is read only...message shows while still running gcode..seems triggered when I pause and change an axis touch off....after a little while all communication stops have to restart..have everything now on a different pc as well as different hard drive (not ssd) only ran for an hour or so.. seemed ok..will check again tomorrow...Actually I got the read only when running the dmesg many times in terminal...that should have nothing to do with mesa right?...so looks like bad ssd...unless I get a surprise tomorrow...i will have to see how to check power supply to mesa I guess...Thanks all for your help!!...this kind of stuff always seems to come when deadline pressures are in play..
  • dlv
  • dlv
Yesterday 21:09

apt update error: "no longer has a Release file"

Category: General LinuxCNC Questions

Someone with experience in Debian Linux admin probably knows what this means and how to fix it.  Sadly that's not me.

Installed LinuxCNC on a plasma table a few months ago.  Been a few weeks since I had it on due to travel.  Tried to do a package update today and got the following:

Notice: Repository 'xxxxxxxdeb.debian.org/debian trixie InRelease' changed its 'Version' value from '13.5' to '13.6'
Error: The repository 'xxxxxxxrepository.qtpyvcp.com/apt develop Release' no longer has a Release file.

Guessing it's something simple?  Machine works but I like to keep things updated so would like to resolve it.

Thanks! 

-Dave

cnc@linuxCNC:~/Desktop/test_plasma_1$ uname -a Linux linuxCNC 6.12.86+deb13-rt-amd64 #1 SMP PREEMPT_RT Debian 6.12.86-1 (2026-05-08) x86_64 GNU/Linux 
 
  • tuxcnc
  • tuxcnc
Yesterday 21:00
Replied by tuxcnc on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

"Error finishing read" on Mesa Ethernet hardware indicates too many timeouts waiting for returned read data.

Most commonly caused by excess network latency.
 

I got "Error finishing read" even after few hours of stable work without any latency.
I don't know why, but the problem is in kernel version and/or network card driver.
 
  • PCW
  • PCW's Avatar
Yesterday 20:17 - Yesterday 20:18
Replied by PCW on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

"Error finishing read" on Mesa Ethernet hardware indicates too many timeouts waiting for returned read data.

Most commonly caused by excess network latency.
  • tommylight
  • tommylight's Avatar
Yesterday 20:14
Replied by tommylight on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

Just went to run dmesg again....after it finished...stretched terminal window...went blank...opened new terminal fullof read only errors??

SSD's will do that when they are failing.
Did you try booting from usb?
  • tuxcnc
  • tuxcnc
Yesterday 20:06
Replied by tuxcnc on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

(which indicate network latency issues)
 

This indicate break connection, not latency issues.
  • PCW
  • PCW's Avatar
Yesterday 19:53
Replied by PCW on topic linuxcnc frequent freeze

linuxcnc frequent freeze

Category: General LinuxCNC Questions

By read only errors did you mean "error finishing read" errors
(which indicate network latency issues)
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