Quote Originally Posted by JAZZCNC View Post
Ok, forget the nonsense about silicone spray, teflon or Lube oil for now because with those steppers running on 36V using lead screws then if it had been parked in the desert for six months and was bone dry they would still move that machine around at more than 1000mm/min if setup correctly.

So let me ask the questions which should have been asked by the others.?
#1 What micro-steps do you have the drives set at.
#2 What pitch are the lead screws (those are lead not ballscrews)
#3 What do you have for Steps per unit in the control software.

It doesn't matter how large your motors are if the controller isn't set up correctly and sending out the wrong number of pulses at the wrong time you will get stalling motors, hence Robin's oscilloscope question.
In the controller, you will have set the number of steps per unit, ie mm and this number is a calculation based on the micro-step setting on the drives, the motor step angle and the pitch of the lead screw along with a ratio if one is used.

So let's say your Micro-steps are set at 400 and the lead screw pitch is 5mm and it's directly coupled to the screws with no ratio. The motors will be standard 200 steps per rev
The calculation for Steps per mm would be 400/5= 80

If your controller doesn't put out the correct number of pulses then the machine will move the wrong distance and if it's very wrong with too many pulses then it would cause the motors to stall even if they had 10 x the power of what's fitted now.

I don't use Arduino's or GRBL etc so can't help on this but it doesn't matter which controller you use if it's not set up correctly regards the pulses it puts out then things like this will happen regardless of motor size or voltage.
1. Currently at 400
2. 3mm Pitch
3. 133.33

Tried with UGCODE Sender and Estlcam
Thanks Jazz