I have a stepper motor driver breakout board based off the Allegro A4988 chip. I noticed that when the motor is static, it has much better holding torque than when moving. I have a battery operated configuration and a majority of the time the stepper motor is only used to hold a position. The limit setting potentiometer is already on the breakout board so I can't change it with my micro-controller.
Would I able to apply a PWM signal to the enable pin of the motor driver to change the current going into the motor so that I can drive the motor at a higher current level when actively moving and reduce the current for holding position?
I'm mostly interested on the effects a PWM signal will have on the driver circuit's life. Nowhere on the data sheet dose it say you can or can not do something like this.