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Hey everyone, Im having trouble with the extruder stepper not working. When I go to test extrude 10mm the motor simply hums. I tried switching the extruder stepper to the z axis to rule out the motor itself, and it works. Then I tried moving the z axis stepper to the extruder spot and that worked too I have no idea what could be wrong here. Any help would be appreciated!

Edit: when I connected the Z axis stepper to the extruder stepper port it was able to lower but didnt have enough torque to go up. Could it be something in the firmware possibly?

Edit 2: I went ahead and changed the current supplied to the extruder from #define MOTOR_CURRENT {155,155,155,165,0} like it says in the most updated manual to #define MOTOR_CURRENT {155,155,155,160,0}, decrease the E from 165 to 160 (I have automation tech. steppers btw). The extruder stepper works now! Another note that in the actual repetier file itself it says to set the wantai (automation tech I assume as well) to use #define MOTOR_CURRENT {140,140,140,160,0}. Can someone elaborate on this discrepancy?

I did not know that Automation Technologies steppers were being supplied with the kits now, but it really makes no difference as long as the stepper has sufficient torque for the intended job.
Most people change the current settings to the steppers because they get to hot and they decrease the current. As long as your steppers work as intended after your current settings adjustment,
I see no discrepancy.