Recommended · for beginners
How To Correctly Set The Motor Current Limit On An A4988 Stepper Motor Driver
Why people recommend it
Walks through setting the A4988 stepper driver current limit by adjusting the trim pot to a calculated reference voltage.
Watch for: check your board's sense resistor value before using the formula
In their words
I found a clearer method in this youtube video: [video] however it uses the equation Vref = Imax * 8 * Rsen where Vref is the voltage you want between the potentiometer and ground (?), Imax is the maximum motor current, and Rsen is the sensing resistance of the driver.
JoelTech43 on electronics.stackexchange.com, Oct 2025. CC BY-SA.
I set the reference voltage on the module according to this method, combined with the information on this page.
Bas on arduino.stackexchange.com, Aug 2023. CC BY-SA.
