Motor/endstop issue



  • I am having issue where the motors judder all except 2x extruders at this point I cant tell if it is the config for motors or the endstops on the z I have a bltouch but I am more bothered about getting x and y working first then worry about z later.my x and y endstops are triggering when I press them both lights on the end stop and board light up they are the 3 wire mechanical switches any advice on where to start would be appreciated. Thanks in advance


  • administrators

    Ignore the endstops for now. Test the motors using G1 S2 commands. For example, G1 S2 X10 F1000 should move the X motor in one direction, and G1 S2 X-10 should move it the other way.

    If the motors vibrate without moving, there are two likely causes:

    • Bad crimp connection in the cable
    • Motors not connected correctly. The two wires from one phase must be connected to the pins at one end of the 4-pin connector on the Duet, and the two wires from the other phase to the two pins at the other end. Do not swap wires around without checking the motor phases, because if the motors are connected incorrectly you can damage the stepper drivers.

    If the wires come straight out of the motor, it is usually safe to assume that red and blue are one phase, and green and black are the other. If the cable plugs into a connector on the motor, then do not assume this, because there are at least two different common wiring configurations of the 6-pin connector on the stepper motor.



  • @dc42 thanks for your reply
    I can confirm the x and y do move after I over wrote the home all m564 s0 h0 but the z axis dont move And makes shuddering noise



  • Check the motor wiring for Z? sounds similar to one of mine where the provided cables was wired wrong



  • I wired these myself there are all wired the same way and connections are good although would I need to up the voltage as using the 2 z ports


  • administrators

    @ear3d said in Motor/endstop issue:

    @dc42 thanks for your reply
    I can confirm the x and y do move after I over wrote the home all m564 s0 h0 but the z axis dont move And makes shuddering noise

    If it's a Cartesian or CoreXY printer with a leadscrew-driven Z axis, that may simply mean that you have set the Z maximum acceleration to high in your M201 command, or the maximum speed too high in M201.

    A bad crimp connection in one of the cables is another possibility. A faulty Z driver chip on the Duet is also a possibility. You may wish to test the two motor/cable assemblies individually using one of the other motor outputs connectors on the Duet.


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