I recently upgraded my Ultimaker 1. The upgrade includes a different stepper motor for the Extruder, the same a Ultimaker 2+ would use. I plugged the new motor and nothing happened.
To eliminate the problem I ordered a new PCB and stepper motor drivers, reassembled all electronics. For some reason the extruder does not move, and actually any other motor I plug into the extruder port doesn't either. I switched the driver, twice, but without a different result.
Can anybody tell me what component could be faulty or how I can find the problem? Could it be the Arduino board, even when I use the Ulticontroller? Maybe remove one of the jumpers next to the driver?