I'm running a small carving machine(home built) using a 3 axis controller from
http://www.stepper3.com/31.htm. Up until today the unit seemed to be operating just fine. With some loss in stepps. My motors are 6v/1.2amp unipolar types. I'm using a standard 12v supply with 1 ohm resistors on the power legs. I was just informed that the correct resistor to use should be a 3 ohm for this setup???
(12v psu)-(6vdc motor)
------------------------------ = 3 ohm resistor,
2 amp current
What I found after playing around a little today was, one of the motors had basically no toque.
Could I have burnt this motor? How much current would be to much?
Neil