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Solved extruder heats up but then 2-3 layers in to a print the temperature drops like a rock

Discussion in 'Troubleshooting' started by BenA, May 28, 2016.

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  1. BenA

    BenA New Member

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    i have the R1 with a E3d v6 extruder and just installed the Modular Screw-on M3 Stud Thermistor
    when i hit print in cura the printer warms up properly and starts properly but then all of a sudden the temperature drops like a rock
    error log:
    Send: N173G1 F1560 X118.878 Y115.880 E150.50400*44

    Recv: ok

    Send: N174G0 F9000 X117.747 Y115.880*99

    Recv: ok

    Send: N175G1 F1560 X102.881 Y130.746 E151.90250*43

    Recv: ok

    Send: N176G0 F9000 X102.881 Y129.615*109

    Recv: ok

    Send: N177G1 F1560 X116.616 Y115.880 E153.19460*40

    Recv: ok

    Send: N178G0 F9000 X115.484 Y115.880*97

    Recv: ok

    Send: N179G1 F1560 X102.881 Y128.484 E154.38026*39

    Recv: ok

    Send: N180G0 F9000 X102.881 Y127.352*108

    Recv: ok

    Send: N181G1 F1560 X114.353 Y115.880 E155.45948*47

    Changing monitoring state from 'Printing' to 'Operational'

    Recv: ok

    Send: M105 T0

    Recv: ok T:190.5 /210.0 B:71.1 /70.0 T0:190.5 /210.0 @:127 B@:127

    Send: G91

    Send: G1 Z10 F200

    Send: G90

    Recv: ok

    Recv: ok

    Recv: ok

    Recv: Error:Extruder switched off. Temperature fell too much during print!

    Changing monitoring state from 'Operational' to 'Error: Extruder switched off. Temperature ...'

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

    I have tried to keep the arduino as cool as possible with big fans and checking that the thermistor is tight and not loose

    please help,
    Ben
     
    #1 BenA, May 28, 2016
  2. Geof

    Geof Volunteer Moderator
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    Hi Ben. Is that when you have your parts fan set to turn on?
     
    #2 Geof, May 28, 2016
  3. BenA

    BenA New Member

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    i am not sure but i will try again and see but it is sometime around when the parts fan turns on
     
    #3 BenA, May 28, 2016
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  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    "Recv: Error:Extruder switched off. Temperature fell too much during print!"

    Is usually a loose thermistor connection. When it reads open circuit the temp will peg low.
    If (for example) the print head start moving and jostles the wiring harness around and there is a loose connection that intermittently causes an open circuit then the firmware will raise this error.
     
    #4 mark tomlinson, May 28, 2016
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  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    If it happens when the parts fan turns on (like @Geof asked) and only when the parts fan kicks on then the parts fan may be blowing on the extruder nozzle (rather than the printing part).
     
    #5 mark tomlinson, May 28, 2016
  6. BenA

    BenA New Member

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    since i have installed the new modular thermistor, it has a plug that is on the x-carrage so should i try and tape that plug together to try and minimize that movement so there is a better connection
     
    #6 BenA, May 28, 2016
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Can't hurt.

    If you are up to it, measure the resistance from where the wire connects on the RAMPS board and while doing that move the X carriage around and see if you notice the resistance jumping.
     
    #7 mark tomlinson, May 28, 2016
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  8. Geof

    Geof Volunteer Moderator
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    Once the 2 connectors are together they should be good. I'd unplug and plug it back in. You should hear or feel them click together then double check its secure in the hotend
     
    #8 Geof, May 28, 2016
  9. BenA

    BenA New Member

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    the temperature drops right when my part fans turn on so i have to angle that part fans lower to hit the part and not the extruder and that should solve the issue right?
     
    #9 BenA, May 28, 2016
  10. BenA

    BenA New Member

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    i don't have a residence meter so if moving the part fans down and securing the wires together will not work i will have to go and get one
     
    #10 BenA, May 28, 2016
  11. Geof

    Geof Volunteer Moderator
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    That very well could be the issue. You want them pointed at the part not the heater. The stock robo setup doesn't work for the e3d because of the size difference between the hexagon and e3d
     
    #11 Geof, May 28, 2016
  12. BenA

    BenA New Member

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    i am trying to print again right now but i turned the fans off so if it works this time that means that it is the part fans that are cooling the extruder down
     
    #12 BenA, May 28, 2016
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  13. Geof

    Geof Volunteer Moderator
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    Yes more than likely. Did you use the e3d heater or keep the hexagon heater and put it in ?
     
    #13 Geof, May 28, 2016
  14. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Well, you could connect the host (whatever software you print with) and open up the temperature chart/graph and move the carriage around and see if it spikes high/low.
     
    #14 mark tomlinson, May 28, 2016
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  15. BenA

    BenA New Member

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    just finished the print with the part fans off and it worked perfectly
    so thank you so much i have been so frustrated about this issue for about a month now @Geof @mark tomlinson
     
    #15 BenA, May 28, 2016
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  16. Geof

    Geof Volunteer Moderator
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    Glad your up and running!
     
    #16 Geof, May 28, 2016
  17. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    You can find (here or on thingiverse) printed nozzles/ducts for the various parts fan configurations that direct the fan more onto the printed part (rather than just having the fan blow in the general direction of the printed part).

    If you are unsure which one works,we can help you figure it out.

    Best of luck.
     
    #17 mark tomlinson, May 28, 2016
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  18. Geof

    Geof Volunteer Moderator
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    Im running the robo r1+ with e3d and dual 40x40x10 fans with these ducts

    http://www.thingiverse.com/thing:977487

    I change mine every so often to try something new. So far I've had the least trouble with these
     
    #18 Geof, May 28, 2016
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  19. BenA

    BenA New Member

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    printed new fan ducts but i can only use one because if i put both on the temp drops. is there a different duct that i should use for the second fan or what @Geof
     
    #19 BenA, Jun 2, 2016
  20. BenA

    BenA New Member

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    i tried the one @Geof suggested but it did not fit my printer
     
    #20 BenA, Jun 2, 2016
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