4 tests completed at varying backlash, all other settings identical:
0.02mm, 0mm (disabled):
0.12mm and 0.11mm
I think there are very interesting conclusions to be drawn here. 0.11mm and 0.12mm are much more different than I would expect.
0mm and 0.02mm are different slightly. Just for reference, here is the correct pattern:
and 0mm (left) and 0.02mm (right)
It’s worth mentioning that there is slop in the X axis of approximately 0.11mm, which is what I was attempting to correct with backlash compensation. However, without any firmware fixes it seems like better performance is had by disabling all backlash compensation.
On the 0.12mm test the minimum and maximum deviation between the overlays ranges from 0.5mm to 2.0mm. It’s interesting how fast it diverges over time.
Final, correct, project:
Next steps would be disassemble the x axis and correct the slop, and disable all backlash compensation globally, as it causes unknown divergence. Until that can be corrected, I feel backlash compensation should not be recommended to be used.