Connecting A4988 Microstep Pins to VCC Causes Short

Support Motor controllers/drivers and motors
1

Hi All,

I am trying to get my A4988s to 16th step. I am using an Arduino and 24V 2A power supply to do so. I wired according to the minimal wiring diagram to begin with and then tested it out. The motors worked just fine. I then tried connecting MS1, MS2 and MS3 to digital pins and changing nothing else. Even having them connected and the Arduino pins low caused the motor to stop moving. I tried with 5V supplied to the MS pins as well and I got the same result. The Arduino even browned out. Does anyone have suggestions to fix this (well, prevent it happening again. The A4988 I was using is now dead)?

Thanks,
Andrew

2

Hello, Andrew.

Can you post some pictures that show both sides of the A4988 carrier, its solder joints, and all the components it is connected to?

- Patrick