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  • TurboTux
27 Feb 2026 18:35
Replied by TurboTux on topic Postprocessor for oscillating tangential knife
Hello,

that looks like a lot of work to do and I hope that the OTK-post processor will be
helpful for you as it just adds the rotation for the knife and, if necessary, the
retractions.
FYI: The stepcraft OTK-3 is a little bit "special", because it requires an unusual 30V power supply and I also had to build a small circuit to connect it to my homemade CNC router.(running at 48V) and to handle the homing and safety stop signals.
Just let me know if you encounter any problems with the post processor.. Maybe
I can fix or improve it.
  • Dudelbert
27 Feb 2026 17:40
Replied by Dudelbert on topic Considering a Full Rewire on a Working Schaublin 125 CNC
I rechecked it multiple times myself. According to --readhmid, it should be fine. In the end,

I gave up and purchased a 7i97T. That should solve all the current problems and all it cost is money ;-)
That is the card I use in my mill. It has one Smart Serial port, and I will need two (for the 7i73 and one 7i85). I plan to build this small board from Talla83 ( github.com/talla83/RS422-SmartSerial-Adapter
), but for starting out, the I/O on the 7i97T itself should be sufficient to get most of the machine running.
  • PCW
27 Feb 2026 17:38
Replied by PCW on topic C axis
A way to debug this is to plot (with halscope) the joint 2 commanded and feedback positions
(setting the following error limits higher may help debugging as well)
 
  • jblanscett
27 Feb 2026 17:27
Replied by jblanscett on topic Trying to set up position control mode
Here is the connector layout. We have the P value set to 0 because we aren't able to get the axis to move when it is set at 1000. I thought we would try to get the motion working better before worrying about it. If we need to figure that out first, I can work on that first. 

Thanks,

-jblanscett
  • RotarySMP
27 Feb 2026 17:26
Replied by RotarySMP on topic Considering a Full Rewire on a Working Schaublin 125 CNC
Is it possible that you have ended up with the wrong firmware flashed? I looked back and the last one I saw you mention was 7i92 plus 2x 7i85. Sounds okay, but maybe Peter can confirm that?
  • tommylight
27 Feb 2026 16:51
Replied by tommylight on topic C axis
Lower the jog speed a lot, like something really slow and try to jog again.
  • Bari
27 Feb 2026 16:46 - 27 Feb 2026 17:15
Replied by Bari on topic Robot Arm and Controller
It's a collaborative arm. I haven't seen an earlier LCNC project that uses the dual encoder joints used in collaborative arms.

They typically use Cycloidal drives with encoders on both the input and output to measure the strain. The difference between the two encoders gives you the strain. This sounds like I need to develop a new HAL component.

For example:
www.celeramotion.com/mechatronics-soluti...ollaborative-robots/
  • Aciera
27 Feb 2026 16:14
Replied by Aciera on topic QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?
The tool path needs to be plotted relative to the work piece. (tool -> world -> work)

The problem is that your tool position is plotted in World coordinates (tool -> world) which works if only the tool moves because the Work coordinate system remains identical to the World coordinates.
However on a machine like yours where the tool AND the work move in space the plotter needs to track both the tool tip as well as the work piece.
This is why the 'vismach' tool needs the capture() function for the tooltip as well as for work.

Not sure but maybe the backplot in ProbeBasic only plots tool position in world coordinates instead of plotting tool position in Work coordinates?
  • Artur_1617
27 Feb 2026 16:04
Replied by Artur_1617 on topic DynexHobby impulse 2 for sale
Hi, What piece You need?
  • PCW
27 Feb 2026 15:43
Replied by PCW on topic Two Mesa 5I20
If you don't mind updating LinuxCNC, you might be better off with more current replacements for the 5I20:

PCIE --> 6I24-16
Ethernet --> 7I80HDT

The 5I20 is a 20 year old card...
  • PCW
27 Feb 2026 15:40 - 27 Feb 2026 15:47
Replied by PCW on topic Trying to set up position control mode
Do you have the step/dir pinout information for the drive?

It does look like it may be single ended from the pictures of the
step/dir modes.

Also in your .ini file, you have the PID P term set to 0.
This should be 1000 (for a 1 ms servo thread period)
A 0 P term will cause position drift
  • amanker
27 Feb 2026 15:38
Replied by amanker on topic QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?
See GIF file I have uploaded. The tool marker from view port is moving in opposite direction. I want it should be below spindle tooltip. As it moves while jogging in X or Z direction. But Y jogging time, table is moving correctly. But tool marker is moving in opposite direction.
  • amanker
27 Feb 2026 15:34
Replied by amanker on topic QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?
How can I resolve this?
  • Aciera
27 Feb 2026 15:28
Replied by Aciera on topic QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?
The problem is that the backplot needs to move with the table.
  • my1987toyota
27 Feb 2026 15:16
Replied by my1987toyota on topic Just When You Couldn't Hate Government More
I suspect that is already in the works. 
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