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Answered printer not heating (fuse?)

Discussion in 'Troubleshooting' started by janot928, Sep 2, 2015.

  1. janot928

    janot928 Active Member

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    Hi, i've been pushing my printer prety far temps whise (280/110) and it has stoped heating up at all.


    -the thermistors aren't faulty (i check with my fingers it is at room temperature)

    I would really like to know if someone as a picture of where the fuse is and what kind of fuse it is (12v 30A??)


    anyway at least i hope your printer is doing fine :p
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Is it just the bed or the extruder not heating or are both not heating?
    The only fuse is the one for the A/C (where the power cable plugs into the printer -- the fuse is there).

    The Arduino will power up regardless since it gets power from the USB cable.
     
  3. janot928

    janot928 Active Member

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    both are not heating but the printer is receiving power from the psu
     
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Then you have a problem with the RAMPS or Arduino... not a fuse.
    My guess would be a bad MOSFET on the RAMPS (but not likely if both heaters are out).

    Check the connections to the RAMPS (the power for both of those come from it via the cable harness)
     
  5. janot928

    janot928 Active Member

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    WHY ME ...... is there a way to be sure about it ?
     
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Without swapping a replacement RAMPS the best bet would be to measure the output voltages on the RAMPS terminals for those and see if it is trying to output power. For both heaters to fail there would need to be two outputs that failed on the RAMPS (D8 and D9)

    RAMPS.png
     
  7. janot928

    janot928 Active Member

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    i trully do not understand what the heck is hapenning but..... it might be working

    the problem is that if it is only working on a 90° angle ... I'm fucked :p

    Update:

    -the bed seems to work normal again but the extruder didn't heat up until i homed the 3 axis and moved the extruder up a bit
     
    #7 janot928, Sep 2, 2015
    Last edited: Sep 2, 2015
  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Seriously recheck all of the connections to the RAMPS a loose one will screw you.
    Make sure that PowerSupply connection (lower left in graphic) is firmly in.
    I mean where it connections to the RAMPS...
     
  9. janot928

    janot928 Active Member

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    <-ok T:250.0 /250.0 B:49.7 /50.0 T0:250.0 /250.0 @:56 B@:127
    ->M105

    <-ok T:250.0 /250.0 B:50.2 /50.0 T0:250.0 /250.0 @:54 B@:127
    ->M105

    <-ok T:250.0 /250.0 B:50.7 /50.0 T0:250.0 /250.0 @:54 B@:0
    ->M105

    <-ok T:250.2 /250.0 B:50.7 /50.0 T0:250.2 /250.0 @:48 B@:0
    ->G91

    ->G91

    <-ok
    ->T0

    ->T0

    <-echo:Active Extruder: 0
    <-echo:Active Extruder: 0
    <-ok
    ->G1 F150

    ->G1 F150

    <-ok
    ->G1 E10

    ->G1 E10

    <-ok
    ->T0

    ->T0

    <-echo:Active Extruder: 0
    <-echo:Active Extruder: 0
    <-ok
    ->G90

    ->G90

    <-ok
    ->M105

    <-ok T:250.5 /250.0 B:50.6 /50.0 T0:250.5 /250.0 @:39 B@:0
    ->M105

    <-ok T:250.2 /250.0 B:50.4 /50.0 T0:250.2 /250.0 @:48 B@:0
    ->M105

    <-ok T:250.2 /250.0 B:50.2 /50.0 T0:250.2 /250.0 @:47 B@:0
    ->M105

    <-ok T:250.3 /250.0 B:50.2 /50.0 T0:250.3 /250.0 @:43 B@:0
    ->M105

    <-ok T:250.1 /250.0 B:50.0 /50.0 T0:250.1 /250.0 @:48 B@:0
    ->M105

    <-ok T:250.0 /250.0 B:49.9 /50.0 T0:250.0 /250.0 @:49 B@:0
    ->M105

    <-ok T:250.0 /250.0 B:50.0 /50.0 T0:250.0 /250.0 @:49 B@:127
    ->M105

    <-ok T:248.3 /250.0 B:50.5 /50.0 T0:248.3 /250.0 @:91 B@:127
    ->M105

    <-ok T:246.8 /250.0 B:50.9 /50.0 T0:246.8 /250.0 @:127 B@:0
    ->M105

    <-ok T:245.0 /250.0 B:50.9 /50.0 T0:245.0 /250.0 @:127 B@:0
    ->M105

    <-ok T:242.9 /250.0 B:50.7 /50.0 T0:242.9 /250.0 @:127 B@:0
    ->M105

    <-ok T:240.1 /250.0 B:50.6 /50.0 T0:240.1 /250.0 @:127 B@:0
    <-Error:Extruder switched off. Temperature fell too much during print!
    <-Error:Extruder switched off. Temperature fell too much during print!
    <-Error:printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
    <-Error:printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
    ->M105

    <-ok T:238.8 /0.0 B:50.5 /0.0 T0:238.8 /0.0 @:0 B@:0



    if you've got any ideas
     
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yea, loose connection to the extruder thermistor (RAMPS connection, wiring from the ramps to the extruder).
    -or-
    thermistor itself is not securely in place (moving around)
    -or-
    thermistor is damaged,
     
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  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That error means that the temperature the thermistor was sending to the RAMPS dropped suddenly so the firmware shutdown the printer. A loose connection or a bad thermistor will do that.
     
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  12. janot928

    janot928 Active Member

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    yeah i kinda already had that problem with the hexagon hotend.
    might have been a short circuit due to the heat rising up (inflation ???)
    anyway gonna print a oiler and then stuff to go bowden

    thanks a lot :D
     
  13. Frankn

    Frankn Member

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    Here's an idea. Wire a spare thermistor to a plug.
    If you have the heat off problem, Just unplug the used thermistor and plug in the test thermistor. You don't have to install it.
    If the heat rises, the old thermistor is the problem. If the heat doesn't rise, the heater is the problem area.
    Trouble shooting is all about isolating the problem. Just a thought, Frank
     
  14. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    One thing that caught me when installing the thermistor. I was handling it a lot and not really paying a lot of attention. On one particular instance I got the wires twisted at the base of the glass bulb. They are so fine, I did not notice it when I put it in the hole in the Hexagon. Started having all sorts of temp issues, took it out and with my reading glasses and a magnifier I finally saw that it was twisted, untwisted it and it worked ever since.
     
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  15. janot928

    janot928 Active Member

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    well i tried to print something big in abs at 260/110.... and i kinda got a big jam: the noozle is complitly unusable...(the temps are those recommanded for the plastic so don`t worry)

    btw have you guys ever print with the 3D2 flexible filament?
     

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