I'm planning on using an RS PRO 892-8732 bipolar stepper motor for a project and was following an online guide to familiarize myself with stepper motors. As the motor is bipolar, I'm also going to need a use a driver, specifically this one.

The driver I'm using has the following formula on the data sheet for it's maximum current:

ITripMAX = Vref / ( 8 × Rs)

The motor has a rated current of 1.68A (I'm assuming this is the peak current as the motor doesn't list a peak current on the data sheet), and the driver has an Rs of 0.11 ohms. This means I should set Vref to 1.4784 (rounding it down to 1.45 or lower as potentiometers aren't exact and I don't want to exceed the rated current).

I just want to sanity check this calculation with someone who might be more experienced with stepper motors.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.