Reply To: Stepper Motors will not move backwards

#13783
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Mike Cunningham
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Unzip the file to a folder, and double-click on the “Marlin.ino” file. Tab over to configuration.h, and ensure that all of the lines at the website below match.

https://www.vicious1.com/marlin-firmware/

The rest is pretty self explanatory (verify Port in the Tools menu, upload)

Second: confirm wiring… 2B and 2A are a pair, and need to go to their own coil. likewise with 1B/1A. If this is the issue, the motors should not move at all; but I’ve seen weirder things.

Third: Are all of your Microstepping jumpers in place, under the Pololu drivers?

Fourth: Have you calibrated your Pololu drivers properly?