Mrambo motor squeel on one driver

New Home Forum LowRider Troubleshooting – LowRider Mrambo motor squeel on one driver

This topic contains 4 replies, has 3 voices, and was last updated by  James Doerksen 2 weeks, 5 days ago.

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    James Doerksen

    Hopefully someone can offer some assistance, video attached describing and showing the issue.

    X-Axis motor goes into a high pitch squeel after stopping motion (not normal motor whine) & loses steps

    when swapping the cables on the x and y motors, the x motor moves and sounds clean, while the y motors show the issues above.

    Using the Mrambo that came with the kit, pwm_motor_control is unaltered.

    Hopefully that provides enough info for someone to help.



    James Doerksen

    Is there an easy way to change in Marlin the motor pinouts, to effectively swap x with e? Using the extruder motor output it runs great. Just the x motor output seems wonky. I’m using the firmware linked off the main page, and the mrambo board was the one provided in the kit.



    I wouldn’t worry about it.  They all do that to a point.  When my printer does it, I just jog it a couple mm, and it stops.  I think it does that when it’s between real steps, the microsteps keep it between full steps and it vibrates in that spot.



    You can swap the pinouts in pins_minirambo.h

    Does it act any differently or just whine?


    James Doerksen

    The motor vibrated excessively, caused the set screws to come loose, I secured them with some medium strength loctite.

    I swapped the motor pins in marlin, and I’m using the E motor driver, everything works better now. guess I just got a partially bad board.

    Thanks guys!

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