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After many days of troubleshooting, I have finally fixed my problem. The issue seems to have been related to the firmware rather than the hardware.

I seem to have incorrectly configured the...

The enable line is not connected to anything, so I may try wiring ENA+ on the external driver to the matching EN pin on the ramps 1.4 shield.



Here is the clearest image I have right now (it...

Here is a link to the schematic (page 2 of the PDF): RAMPS 1.4

The problem:

I have successfully connected a Nema 23 stepper motor to a Ramps 1.4 shield (which interfaces with the computer through a 3D printing program called Repetier-Host), however it only...