Well , the last couple times this happened , they stabbed him in the chest with a cosmic energy conductor to burn the infected shadows out of him . <| sep |> There is no such thing as an irrelevant xkcd ! <| sep |> You can do some troubleshooting . Disconnect the drive belt and run an Xaxis test . Does the motor spin then ? It doesn ' t really sound like it ' s skipping steps . Did you try high power mode instead of silent ? Try swapping that motor ' s connector to the Y axis output on the controller and run a Y axis test . Does the motor turn then ? If so , you have a bad X axis motor driver . Connect one of the knowngood motors to the X axis output on the controller and run an X axis test . If it moves without a problem , the Xaxis motor is likely bad . If not , it ' s probably the controller . Does the motor turn relatively freely when disconnected from the drive belt and motor driver ? You should feel some cogging from the magnets but it shouldn ' t bind up . Try it with one of the other motors too to get a feel for how it turns when disconnected from everything . Disconnect the X axis motor from the controller and move the X axis by hand . It should slide along fairly freely and spin the motor as well . If it binds up , disconnect the drive belt and see if it ' s the motor binding or the carriage .