If I change the motor voltage to a higher or lower voltage,do I have to reset the current pot voltage? I have them set to 1.5 volts for 1.5 amps. Changing 12volts to 24 volts motor supply. Thanks, Carl
If the current limit is set properly, you should not need to change it when your motor power supply changes voltage.
By the way, you mention that you have it set to “1.5 volts for 1.5 amps”. If you are trying to set the current limit to 1.5A, VREF should be set to 0.75V. You can find the formula and details for current limiting in the “Current limiting” section under the description tab of the DRV8825 Stepper Motor Driver Carrier’s product page.
Good catch on my saying I set it at 1.5 volts. I had something in my head, but I did have it set at .75 volts. Thanks for the answer. Carl