Driving Stepper motors

Hardware
21

Stepper.h is really the Arduino stepper code so it is not likely to have many bugs. It could happen, but it is less likely that the problem is there.

That’s a very small stepper motor, so I would not expect it generate heavy torque. In the second video, he is using a 6.3V 175mA supply he says to get ~5V to the motor after the drop from the driver. He is running the motor very slowly at 3500us (3.5ms) per step. I think this might be the key to getting good results.

You are setting 120rpm and he says is using 8.4rpm. Have you tried slowing the motor down?

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22

HI @iarakis -

I agree with what @bko said. I doubt there is a problem with the library, it is quite widely used.

I knew those motors looked familiar, checked in a box and found two which I removed from faulty label printers, They can have quite a bit of torque but doubt you will get that at 120rpm. Looking at the speed they turn at in the printers, my guess would be more around 5-10 rpm which seems to line up with the 8.4rpm @bko mentioned.

Best of luck!
Friedl

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