Failed to use stepper motor driver.

Autonomous Robot, Manual Robot, DC Motor Driver, Stepper Motor Driver, Servo, Multi PWM chip.....

Re: Failed to use stepper motor driver.

Postby sich » Tue Nov 20, 2012 1:57 pm

If you are using UART control, these two pins are to be left disconnected. However, if you want to use the PULSE pin to 'step' your stepper motor, you have to use EN (enable) and DIR (direction) pins so that the driver knows how you want the motor moves. Your case demonstrates that the driver is getting noise from these pins and giving unknown output.

There's no way to leave the shaft loose and make it moves at the same time. You can connect these three pins (EN, DIR, PULSE) to microcontroller's output pins. So when you want the shaft to be loose, you can give 0V to EN pin. But this will stop the motor from moving too.
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