Hi,

A year ago I installed Chinese single ball nuts on X and Y. I know, they are Chinese after all but outside the machine they felt not tight but not loose either. So I installed them. Now I have 0.0875mm backlash on the X and 0.1375mm on the Y which I believe is far from acceptable.

Is there anything I can do to tune up and decrease the backlash to an acceptable range (what range is acceptable anyway?) or is double ball nut the only way to go?

Best,
Suat