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That is a PCI card (a 5I20)

If the motherboard is OK, probably the easiest path
is to just get a new harddrive

Is there any chance the original HAL and INI files  are available or
can be salvaged from the hard drive?

One thing on the plots, adding the Z velocity would make analysis easier.
Both in determining the start of motion and the point where Z motion
becomes synchronized with spindle rotation

Also an actual screenshot is easier to check than a picture because its
accurate and does not have geometric distortion. (making it hard to tell if
lines are straight)

Here's another interesting example. I first made a threading scratch pass at 50 RPM. When the second pass started, I cranked the spindle speed quickly up to about 300 RPM (I'm guessing), then back to 50 RPM. The second cut started overlaying the first, then went to the right as the speed increased, then back to the original cut at the end.

So the speed definitely affects the Z position, and my original concern about the lathe bogging down during threading in a deep cut and then that slowdown causing gouging is warranted.

beauxnez wrote:

Thanks, I don't know if I did it right but I got an error message.
That's a warning, not an error. You can usually fix it by copying the

That's a warning, not an error. You can usually fix it by copying the libusb.dll (libusb dynamic link library) to the path of your Python installation.

Note: If you downloaded Python from the Windows Store, you should copy libusb.dll to the C:/windows/system32 directory.

I spent 20 minutes trying to sketch a simple part to revolve and gave up after the autoconstraint engine completely hosed up the sketch. They really really need to put work into the sketcher and the UIX , it is still god awful to use. Hell I am willing to donated money on a monthly basis to get out of using fusion360 at this point, but there doesn't seem to be any seriousness from freecad developers about working on it fulltime.