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I just checked and I was actually on LinuxCNC 2.9.4. QtPlasmaC version is v2.9-238.315. Is that version effected by the bug you mentioned? I'm going to assume so since the gcode works for you.

I've also just deployed a new version of MetalHeadCAM to metalheadcam.alan-gibson.workers.dev/. I'd really appreciate your feedback on it as I'm specifically targeting QtPlasmaC.

The basic workflow is:
- Click the hamburger menu and then Tools so you can add your tool parameters
- Import a DXF file on the Import stage
- Skip the Edit stage for now as it doesn't do much yet
- Click the topmost Apply button on the Prepare stage
- Add operations to parts and shape chains on the Program stage, making sure to select what you want to cut in the Apply To dropdown.
- Simulate the program on the Simulate stage or just skip it
- Download gcode on the Export stage

Hi All,
I've just released an update that provides improved lead in/out support. Any feedback is of course appreciated.
 

qtdragon.probe-error pin is an I/O pin not an input pin.

I'll have to think more on the best way to add external error checking/handling.
It's a problem spot for linuxcnc.

Ok, sorry for the images. Anyway, I performed all the math on Google Sheets, so you can enter the B-axis position on the ball screw, and it will provide you with the spindle angle, the tooltip x-offset, and the tooltip z-offset. The range of travel for the B-axis is 0 to 305mm. You can enter this in cell Y11, and it will spit out the results. I have also illustrated the drawings better here so that hopefully you can understand. Here is the link . I have looked at the Kinematics tutorial on the website, but I just learn better if I can see someone do a working example. After hours of reading that with Gemini helping with some of the explanations, I don't know how to start writing the code. Anyway, from the tutorial I posted earlier, there is an image of this person's kinematicsInverse function, which I will insert below.

From what I've understood, the job of this function is to understand the required tool tip movement and spit out the number of steps each axis motor needs to make, correct? If that is correct, I should be able to modify the trigonometry here to accommodate my ballscrew articulated B-axis and get this going, hopefully. Because his setup also has an XYZAB setup similar to mine.

If your're running a mes card there is no need to test with a base thread. Servo thread is all that is needed.
Usual advice, turn off power saving, anything that attempts to change clock speed in the BIOS, also turn off hyper threading if that is an option, for a 4 coremachine you might get some relief from isolcpus=2,3

It may help to supply some details regarding the machine you're using.