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Unresolved Fine til I start printing then Extruder switched off

Discussion in 'Troubleshooting' started by Gary Boyce, Oct 24, 2016.

  1. Gary Boyce

    Gary Boyce Member

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    I recently began having this issue with every print! I tried reflashing the firmware with the hex file through matter control and I have checked all the connections. This started after the Z axis min switch didn't cause a stop when it hit the bed and kept going. I had to cut power and redo the Z axis switches and nuts. I just don't know what else to check. It heats, Homes , and levels fine.


    ->N1266 G1 X85.47 Y136.14 Z0.3 E13.533*14 [480.743]

    <-ok [480.796]

    ->N1267 G1 X86.19 Y136.44 Z0.3 E13.572*7 [480.796]

    <-Error:Extruder switched off. Temperature fell too much during print! [480.817]

    <-Error:printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting) [480.825]

    <-Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting) [480.854]

    <-ok [481.580]

    ->N1268 M105*26 [481.580]

    <-ok T:214.5 /0.0 B:80.0 /0.0 T0:214.5 /0.0 @:0 B@:0 [481.587]

    ->N1269 G1 X86.37 Y136.49 Z0.3 E13.581*4 [481.587]

    <-Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting) [481.596]

    <-ok [481.596]
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    This error has been much addressed if you search the forum, but it boils down to a thermistor failure.
    It is usually the thermistor is:
    1) phyically loose and moving around when the extruder moves around which causes the temperature to move around and the firmware to kill it.
    2) cracked or damaged and this will also cause the temperature to fluctuate when the extruder moves and the thermistor vibrates.
    3) There is a loose wire (or a bad connection) between the hotend and the RAMPS board.
     
  3. Gary Boyce

    Gary Boyce Member

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    Thanks. I Have checked connections on Ramps and at the extruder/hotend. I will go ahead and order a new thermistor.
     
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    They are cheap :)
    If you have an R1 then make sure the rubber boot that holds the thermistor in place is secure and not moving around/loose.
    The R1+ has a set screw that holds the thermistor in the heater block.
     
  5. Gary Boyce

    Gary Boyce Member

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    I replaced the thermistor and tested again. I also tried a different print. The print stops in the same spot each time now, on the first time around on the first layer. I rechecked the connectors by the hotend/extruder and also at the Ramps board. I'm not finding a thermistor problem. I also heated up the hotend and moved the wires around for a bit while watching the temps in the terminal. I never saw a temp drop. Please help.
     
  6. janot928

    janot928 Active Member

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    do you have a fan blowing air on the hotend ? caused me that problem (temperature dropped to low and print failed) also try and re-tighten the heater cartridge (if you are using a E3D hot-end)
     
  7. Gary Boyce

    Gary Boyce Member

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    Yes, but I always have. I think the fan for cooling the ramps board was going bad. Getting ready to retest now after replacing that.

    Sent from my SM-G930V using Tapatalk
     
  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That is always a problem and hard to diagnose because it causes just general 'weird' stuff
     
  9. Gary Boyce

    Gary Boyce Member

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    I just finally got a print out of it. After replacing the ramps fan it got further but still failed. Then I turned off the parts fan and it printed. Thanks guys.

    Sent from my SM-G930V using Tapatalk
     
    mark tomlinson likes this.

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