I am using an Arduino Mega with a Ramps 1.4 board. I currently have all 5 driver spots filled and will be using a stepper driver expansion board to be adding a 6th stepper motor. My question is what digital or aux pins can I use on the Ramps 1.4 as the Step, direction, and enable pins?
If You provide a link to the datasheet more helpers can tell. Else, wait for someone knowing that board.
Here is the Ramps 1.4 Datasheet https://osoyoo.com/2016/07/03/reprap-3d-printer-circuit-connection-graph/
Look at a picture named "Mega conn.". There You find free pins for Your sixth stepper driver.
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