Unmarked Stepper Motor

Other Hardware Motors, Mechanics, Power and CNC
1

I have an unmarked bipolar stepper motor 41x41x47 mm with a 5 mm shaft.

Is there any way I can determine the current rating of the motor?

If not should I simply try running it at 1A per phase and see what happens?

2

What is the winding resistance?

3

2.7 ohms

4

OK, that would be a suitable low impedance motor. Industrial quality motors are designed to run hot, and are typically rated for continuous operation at case temperatures 60 to 80 degrees Celsius above ambient.

So, adjust your motor driver current limit to various values, starting at 0.5 Amps/winding and working up. At each current setting, measure the motor case temperature until it stops rising. As in gambling, quit while you are ahead!

Naturally, if smoke starts rising, that would be a good time to cut the power.

5

Thanks will follow recommendations.