Servos

After playing around with a stepper system for months and trying to
resolve lost or gained step problems I gave up.
What I found with open loop steppers is that on some nc files I would
see this. Now I'm running servos and never looked back.
Other members have listed pros and cons of either method. This is why
I would go servo ,... For one, no worry of lost position
from part to part. I ran 12 rudder cores at 2 hrs a piece. I'm going
to redesign my mill making it more robust. Belt driving 4 to 1
using my current 1 inch lead screw to get the torque I need. In doing
this I will be able to mill denser material and take larger cuts
at speed. Typically servos run at a much higher rpm and you don't
loose the torque one is trying to gain by "gear reduction". And
with a servo ( encoders ) I can change to a lower resolution and
maintain my current 2048 cpr. at .0005. CPU load stays the
same and I don't push my control software either. I think steppers are
fine for small mills where speed is not important but for
large router tables servos are the way to go .

Frank