cannonfodder
New Member
I'm having a bit of a problem running an old 12VDC stepper motor and need some help! The only markings it has are "12V - 3.5W" I've measured the resistance of each winding (it's a 4 phase unipolar) and they each measure at approx 10R.
3.5W/12V = 0.29A... but... 12V/10R = 1.2A!!!!
I know I need to "current limit", but every system I've tried, simply lowers the voltage down to something useless (<3V) in order to keep the current at the correct value.
The only method that sounds feasible is PWM... but I don't want to go down that route unless I have to!
Thanks again for any help!
Cannonfodder
3.5W/12V = 0.29A... but... 12V/10R = 1.2A!!!!
I know I need to "current limit", but every system I've tried, simply lowers the voltage down to something useless (<3V) in order to keep the current at the correct value.
The only method that sounds feasible is PWM... but I don't want to go down that route unless I have to!
Thanks again for any help!
Cannonfodder