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Ramps 1.4 - motor issue (3 replies)

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Hi all,

I got these nema 17 motors, found that they are 6 wire Japan Servo Company motors.
It is 3 wires per coil with centertap. From my understanding, The setup would work Bipolar if i just ignore the centertap.

The problem I am running into is that when I load the test software, the motors just vibrate. If i put a delay in there, it will move maybe one step, then switch direction. I have them wired as one coil to A, one coil to B, can the coils be backwards?

I have a 50 amp 12V PSU that will run the entire setup(had it laying around at work).

Under the Motor drivers, I have all 3 jumpers in place. Do i need to remove one?

The motors are KH42JM2b1400 DC5 16v 1.2A 1.8 degree /step.

I tried hooking just the motor voltage to 16 volts, didnt make a differance.

Please help!! Printer is fully built, just need to figure out the motor issue.

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