Quote Originally Posted by grain_r View Post
Hey Clive

Brilliant thank you very much for that I will get them on order.

I have looked on the cnc4you and the grubscrew pulleys but i'm not sure if there is a formula to stick to or is it not the teeth but the ratio that is important. I'm sorry I have never got to grips with pulleys.

I think the original 1605 ballscrews because now I'm going with Hiwin rails i'm going to maximise the space.
I have just noticed that you posted 4Nm I generally use 3.1Nm motors. re the pulleys I will check tomorrow but have a look at 30 teeth for the small one you could also use 1:1.5