No. A Servo motor only provides as much torque as it needs to do what it was commanded to do. It basically just keeps trying to get to where it's encoder says it should be. If you push on an axis and backdrive a ballscrew, as soon as the encoder position changes, the drive will send more current to the servo to correct the position error.But doesn't the servomotor provide constant torque regardless of current or speed (except maybe peaking intermittently)? So the screw would only know it's getting x Nm of torque, not how much current is being pulled by the servo.
If a servo had constant torque all the time, it would burn up quickly.
But my whole argument is that with a higher pitch ballscrew Barefootboy4 could utilize his stepper's power better than with the 5mm pitch screws he's now using.
I'm 100% in agreement. We just got off on a tangent.