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  • andypugh
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03 Sep 2025 12:00

Issue with Inverse Kinematics Failing During Homing – 3-Axis Robot with LinuxCNC

Category: HAL

i think you have to build a new kinematic module for 3 axis robot because Genserkins can't be used for less than 6-axis robot.

This does seem to be true:

github.com/LinuxCNC/linuxcnc/blob/master...cs/genserfuncs.c#L99

But it doesn't look like it would be difficult to make it a load-time parameter. 
See how trivkins uses RTAPI_MP_STRING:
github.com/LinuxCNC/linuxcnc/blob/master...atics/trivkins.c#L48

link_num could be defined the same way with RTAPI_MP_INT
linuxcnc.org/docs/stable/html/man/man3/RTAPI_MP_INT.3rtapi.html
 
  • andypugh
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03 Sep 2025 11:50
Replied by andypugh on topic Mpg stop working

Mpg stop working

Category: AXIS

Is this a USB MPG?

If you look in dmesg do you see it being disconnected?

I think I used to have this problem about 10 years ago, but I don't recall if I ever found a solution. (I stopped using the USB gamepad)
  • andypugh
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03 Sep 2025 11:48
Replied by andypugh on topic Lathe "pecking" on X?

Lathe "pecking" on X?

Category: G&M Codes

What do you mean by "pecking"?
  • andypugh
  • andypugh's Avatar
03 Sep 2025 11:47
Replied by andypugh on topic Mapping key codes to specific jog rates

Mapping key codes to specific jog rates

Category: Advanced Configuration

github.com/LinuxCNC/linuxcnc/blob/master...scripts/axis.py#L194

Suggests that ",", ".", "<", ">" should change jog rate.
But I don't see the keybindings in the code to make that work.

(I don't have a LinuxCNC machine handy right now to test with)
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