Quote Originally Posted by djc View Post
You should budget to change the steppers. I'm using ArcEuro's 4.2A driver and the original motors aren't great (old technology). NEMA 34 motors are probably overkill but they bolt straight on (Arc or Rhonmac); you would need an adaptor plate if you go with 23's.
If you are intending to use Nema 34 motors then I would strongly advise that you get higher voltage drivers than the 50v 4.2A ones at arc euro. Most Nema 34 motors won't go very fast on only 50v.