Hello!

So we built this CNC machine our self. Huge, 2x3m cutting area, first build, most of it manufactured in my workshop. And now we are in the process of dealing with weird bugs that we cannot really sort out anymore.
In some areas, I tend to notice, in diagonal directions we get these artifacts. What the hell is going on? Rack and pinion is our drive mechanism. Backlash is not enabled. Chinese drives and Nema 34 motors.

Sometimes it happens more, sometimes less, circles are more or less okay, but weird curves and ovals tend to be worse.
Those artifacts also did not appear with one Hardcore cut. That was 3 multiple passes with a finishing repeat. So it means it is bloody following that artifact pattern.

In the video you are also able to see when this "shaking" is happening. I cannot find any correlation between speeds and depths of cut. At least not yet.

Could it be clearance between rack and pinion?

Help guys!




https://scontent.fosl3-2.fna.fbcdn.n...bb&oe=5E955B03