If you don't adhere to the motor tuning, won't it just fault out the servo drive anyway? If not, crank up the motor tuning!
Mike
I think it is because the movements during THC are small that the infinite accel doesn't affect it too badly where as cranking the accel up in motor tuning would affect all motion.
Anyway looked at the pulleys today and they were both bored out to 8mm so it was a relatively easy swap, had to machine a plate that held the motor on a wee bit but that was all.
After re-tuning the motor it seemed to be fine at the previous settings which I was quite surprised at as it is a tiny servo and I was basically quartering the available torque compared to previously.
Here are a couple of vids, first is it cutting and as hopefully can be seen the pulley is not moving nearly so much now and thus the motor as well. The second is a view of the THC control panel and Mach itself, you can just about see the arrows for up/dn changing but the camera is not the best
https://www.youtube.com/watch?v=EmYRA_cd-0ohttps://www.youtube.com/watch?v=Vh6rrtxSTpY