Re: Force through ball screw based on stepper motor torque??

Update...

Someone sent me an email reporting that they fried a drive by doing
the current measurement as prescribed earlier. As I don't have a
backup drive on hand, I can't do the current measurement yet (in
case I blow something). I simply can't take the chance at this
time, in about a month I will have some open time to experiment.

Answers to questions that have come back at me..

This is the test setup...

Bathroom scale against a fixed point - "padded" with a large block
of wood to distribute the forces.

Slowly, (as slow as I can jog), move the axis into the scale while
reading the "force". I jog until the stepper skips - this is what I
call the maximum force I am getting.

This is done on all three axes with similar results. They do vary
as not all three motors are the same.

I do not have a means of measuring the torque of the motor directly -
yet. I do plan on making a 2" diameter pulley with string and
a "bucket" to load up with weight and measure it that way too.

I don't have a motor dyno at my disposal so I am forced to go down
the "Crude" measurement path :-)

Chris