Quote Originally Posted by UUU View Post
How much water do you have to put in the bottle to get 300ipm?
Sorry, I was out of town for a while. If I weight it down with 3kg it travels the full meter in under three seconds: so 8kg.cm yields 30cm/s (110oz.in at 700ipm)

At this speed, the stepper RPM would be 90. Still in the contant torque zone for most motors.

From that perspective 260oz.in motors seem plenty powerful to me. How much headroom do I need for torque ?

Also considering that adding a plasma torch, cables and Z-axis will make everything heavier and causes resistance.