thank you for reply Blackrat

i know that name 23's is better specially for gear reduction for high speed iam looking for without loosing torque but available name23 has high inductance 6mh which mean require 78V PS and the biggest available PS is 60V only
Nema 34 has 3.4mh which mean more appropriate for 60V PS


For gear rack

  1. 5:1 ratio(90 teeth-18 teeth) for Nema 34 frame only
  2. 2:1 ratio (40 teeth-20 teeth)
  3. 3:1 ratio (60 teeth-20 teeth


The pinion on rack 28 teeth

4 Chinese drivers 7.8A 80V

I cannot estimate the weight of the gantry because it is not yet constructed but it will be two welded steel boxes 100*100*3

i order spindle 2.2kw 5.5KG

may be this information help