Quote Originally Posted by leadinglights View Post
Thanks again Irving. As I willl be using ballscrews with a 5mm pitch, I think that halfstepping at 0.0125mm per half step is perhaps a bit lumpy so I am now looking at using a toothed belt drive for the ballscrews.

Mike.
I have 16mm x 5mm pitch ballscrews on x,y and z on my machine running at 1/4 step, runs very nice and not noticed any lumpyness. Did try them at 1/8th and 1/16th step just to see how they ran but did not seem to make too much difference.

Mine are direct drive but belt driving them will give you more mounting options so definitely worth thinking about.

Just my two-penneth..!