Losing steps/position, again

[ngwagwa]

I had a PC that would knock / lose steps on every 360 degree rotation of the screw on every axis.
I re-installed windows and the issue was gone.

It was an error with NT driver in windows that came up every so often.

When I first had this fault I did try a completely different PC and it didn't solve the issue. On the other hand if the problem was as consistant as yours it may be easier to solve.

[JAZZCNC]

Maybe worth taking a video because missed steps don't really knock.? A knocking would certainly make me think mechanical.