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Unresolved Extruder assembly smoking!!!

Discussion in 'Troubleshooting' started by PTIschool, Feb 24, 2021.

  1. PTIschool

    PTIschool New Member

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    I have been working on my robo r1+, trying to get it to work after replacing the glass bed and thought I finally had everything figured out, but now when I heat the bed to start a new print the Extruder assembly starts to smoke and I also noticed that the thermistor said 190 when I hadn’t even heated it yet. The thermistor doesn’t seem broken and the rest of the wires seem fine too. Any ideas what could be causing it?
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Bad thermistor (yes, it could still be the thermistor) or bad wiring (which you may have eliminated -- assuming the quick-disconnect connectors are good) or bad RAMPS board :)
     
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    So the thermistor is just a resistor that varies resistance based on temp. If it is stuck at a temperature then the resistance the RAMPS is seeing is "stuck" too (or the board is faulty).
     
  4. PTIschool

    PTIschool New Member

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    Ok I will check. Thanks.
     

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