Quote Originally Posted by blim View Post
Can you help me with these two questions?

1. Which timing belt and pulley size do you use if you run with one big stepper?
2. I plan on buying AM882 drivers. Would you go with CSMIO-IP-M + belt or PLCM-E3 with slave stepper if you were to build a new machine now?
Yes no problem. If your tearing belts apart then something was very wrong. 2 ballscrews and 30Kg is nothing for belt drive. I use this method all the time with 2 x 20mm 10mm pitch ballscrews and never have any trouble with belts tearing.

Q1: 15mm HTD belts are what I use. Pulley size depends on machine but often I use 18 or 20T. Try to keep the pulley size small possible to lower inertia but keep in mind shaft size so don't go too small.!

Q2: Simple to answer because I've just built two identical machines using the same setup.
IP-M and with belt drive using 4.5Nm Nema 34 motors turning 20mm dia 10mm pitch screws with 1.25:1 ratio (16T on motor 20T on screws)