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    • This guide shows you how to re-arrange the motor cable in case your stepper motor is not rotating freely and making a buzzing/ clicking sound.

    • Different stepper motors, and different printer boards have different wiring sequences in order to match up the coil pairs.

    • Typically these sequences are either A1,A2,B1,B2 or A1,B1,A2,B2

    • So by rotating the middle two middle wires you re order the coil pairings.

  1. The motor cable connects the motor to the E stepper driver. The motor cable connects the motor to the E stepper driver.
    • The motor cable connects the motor to the E stepper driver.

  2. Unplug the Molex cable from the motor side.
    • Unplug the Molex cable from the motor side.

    • Use a small flat head screw driver or something similar to lift up the the small flaps that lock the wire in place.

  3. Gently pull on the two middle wires to remove them from the Molex connector.
    • Gently pull on the two middle wires to remove them from the Molex connector.

    • Remember which way up the connector goes in.

    • Switch the middle two wires round.

  4. Plug the two middle wires back in the new position.
    • Plug the two middle wires back in the new position.

    • Fold the flaps down to prevent the wires sliding out.

  5. Reconnect the cable to the stepper driver output.
    • Reconnect the cable to the stepper driver output.

    • If when you try to rotate now and the motor makes a worse buzzing or clicking sound, then the wiring may not have been the issue, switch the middle two wires again and contact support@e3d-online.com

    • Please note that the in most firmware configurations the option to prevent cold extrusion is enabled meaning the HotEnd must be preheated before the extruder motor is able to be activated.

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One other person completed this guide.

Dan Rock

Member since: 06/07/2018

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40 Guides authored

2 Comments

I experienced a different wiring problem with my Hemera. The 6-pin plug that connects to the stepper motor was wired incorrectly. The blue wire was in the 5th position (or 2nd, depending on how you look at it), when it should have been in the 6th position (or 1st). Once I moved the blue wire and pin into the correct position, my problem went away.

Kevin Williams - Reply

Hi,

I’m hella stuck. I’ve tried just about every order of cables but every time the motor just buzzes and doesnt turn Im running the “Bigtreetech skr mini e3 V2.0“. I’ve checked everything firmware side. As far as I can find the correct order should be this: https://imgur.com/a/4nO6uJg SRC: https://github.com/bigtreetech/BIGTREETE...

Hope you can help me out

Robin Popkema - Reply

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