Few pics of my homemade CNC mill

**primorc20** · 15-02-2011

Is this PM542 stepper driver? What voltage do you use?

**wiatroda** · 15-02-2011

I use PM752 supplied with 65VDC. Transformer is 500watt.

**primorc20** · 15-02-2011

And the beakout board you use is pcpps from zapp automation? Because in the manuals for this board is written that it supports only max 35V? But the board is using the same voltage as drivers?

**wiatroda** · 15-02-2011

Please see 1st picture on my website - Control box http://malamuterun.co.uk/cnc/homemade_cnc_mill.htm
There is two power sources.
1. Toroidal transformer with 25Abridge and capacitor at the top for PM752.
2. 25V power supply at the bottom for PCPPS-3 from zapp.
Two power suppliers share ground/negative.

**Jonathan** · 17-02-2011

Originally Posted by primorc20

Is this PM542 stepper driver? What voltage do you use?

If you're deciding which driver to buy then get the PM752. The higher voltage will make the motors run with higher torque at high speeds, and thus faster overall.

Currently I use the PM752 on 75v, though that should change in a few weeks when I've finished prototyping my 120v driver design...

I'm also using a 500VA transformer with 4 of the 3 N.m motors.