Hello All, Newbie here. I just finished my first CNC table/ Engraver carver. After burning up several old style AT power supplies, and shutting a few down. I broke down and purchased a 13.8v/ 10.3a Power supply from Radio Shack. I was able to drop the power down 8.8v to power my controller board. And I left the 13.8v legs to power my three (6vdc/unipolar motor). I'm told that with a 6 volt motor I would be better off with 12 volts because at any given time two phases of my motors could run at one time, thus needing at least 12 volts.
I'm getting an awful lot of heat from both my motors and the power supply. Should I be running my motors at 13.8v as is or should I set up a current limiter? or should I step down the voltage from the line to only give the motors the indicated 6 volts. The machine seems to work fine, although I can stall one of the motors by hand after some running time.