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Unresolved Burning smell from extruder stepper

Discussion in 'Troubleshooting' started by thebirdthatflies, Sep 30, 2017.

  1. thebirdthatflies

    thebirdthatflies New Member

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    I have the R1+
    Whenever I start printing, the stepper on my extruder emits that familiar burning smell you get when you run a motor at too high a voltage. It also occurs just running the motor without filament.
    Any idea what could be going on? I didn't flash any firmware.
     
    #1 thebirdthatflies, Sep 30, 2017
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Is the extruder stepper running hot? It is not a voltage driven motor, rather a stepper (current driven, by PWM steps like a servo would be). It is possible that the stepper driver is over driving it, see how hot it is.
     
    #2 mark tomlinson, Sep 30, 2017
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  3. thebirdthatflies

    thebirdthatflies New Member

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    Alright. Ill print a stepper cube and see.

    Hmm ok. Maybe it was just that model I tried to print. I made a large and thin name plate that was about 200mm square, so maybe MatterControl lost its mind at that one
     
    #3 thebirdthatflies, Sep 30, 2017
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It should be getting roughly a 1 amp drive, but the driver can be going flaky and it can source as much as 2.0-2.5 amps... when it drives too heavy the motor will overheat. It will still work fine, but that is not a happy situation :)
     
    #4 mark tomlinson, Sep 30, 2017
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  5. Geof

    Geof Volunteer Moderator
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    I'd check to make sure your cables are tight and well seated as well :D just in case
     
    #5 Geof, Oct 2, 2017

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