Hi, everyone. I built an Engraving and Milling Machine and meet some problems in curve feeding motion. (This machine uses AC Servo Motor for driving.)
At the bottom of the curve you can see the protuberant track, has anyone met this problem before, and what should do to solve this problem?

I think the protuberant track maybe have some relationship to the clearance(backlash) of ballscrew.
When I use backlash compensation is AC Servo Driver the protuberant track can be reduce to a small line, but other problem will meet, there will be some Snicks on Top Surface (always in the Same Place).

Can we discuss about this problem here!