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Solved Temp shows 230C when stone cold at start up

Discussion in 'Troubleshooting' started by Rigmarol, May 26, 2016.

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  1. 3D Printer Man

    3D Printer Man Guest

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    By laser thermometer, is it infrared? How trustworthy is it.
     
    #61 3D Printer Man, May 31, 2016
  2. Rigmarol

    Rigmarol Well-Known Member

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    yes, Infrared Thermometer.
    Everything else I've measured has been within reason.

    For example, the bed measured within about .5 of what it was set to preheat at; 50C it measured 50.45C. And a cube of ice in the brandy next to me was 4.5C.
     
    #62 Rigmarol, May 31, 2016
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I have used one as well and it is extremely difficult to get real readings on the brass nozzle with it. The bed is easier. That usually works fine.

    If it is printing then 50c is obviously incorrect. The filament isn't flowing at that temperature.
     
    #63 mark tomlinson, Jun 1, 2016
  4. Geof

    Geof Volunteer Moderator
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    I'm saying ramps board still...or matter control has a new level of crap :D (kidding...or am I? ).
     
    #64 Geof, Jun 1, 2016
  5. Rigmarol

    Rigmarol Well-Known Member

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    I agree that the the reported temps from matter control and my laser are obviously incorrect.

    Mystery is why. And of course how to best fix it.

    I started with Matter Control and Cura reporting at room temperature the nozzle was 230C.
    I went into MC settings (Advanced) and under Filaments there is the default preheat setting for the bed and extruder.
    I changed the extruder from the default 210C to 250C and saved it.
    I preheated both and they came up to 250C and 50C just fine. With the lazer I measured both while the extruder was not moving yet. At rest its simple to target the nozzle. When its move its a challeng lol. Laser showed bed was 50C and nozzle 54C. Yet i saw mayerial oozing out! So i figured why not try a print?
    It successfully print an elephant on high quality for about 5 hours with no issues!

    So, im going from stone cold to some unknown temp that is hot enough to print. Laser isnt helping as we all know 54C isnt hot enough.
    Next is to contact Support and share this info with them.
    Im assisting my Dad at the Dr today most of the day but I hope to get to this today or tomorrow.
     
    #65 Rigmarol, Jun 1, 2016
  6. Geof

    Geof Volunteer Moderator
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    That is quite the odd issue. Other than you have tried other software and it failes and switched the connection and it failed i really do think you need a new ramps but im very interested to see what happens.
     
    #66 Geof, Jun 1, 2016
  7. Ryan TeGantvoort

    Ryan TeGantvoort Active Member

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    I am sure you have already tried this, but when I installed my Dual Fans, I accidentally switched the plugs around and was getting a similar issue. I noticed it when I could not get my new Fans to turn on. As others have said though, my money is on the Ramps.

    Robo Tech Support actually just sent me this Diagram of the Ramps the other day.
     

    Attached Files:

    #67 Ryan TeGantvoort, Jun 1, 2016
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  8. Rigmarol

    Rigmarol Well-Known Member

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    Nice resource with the picture Thanks!
     
    #68 Rigmarol, Jun 1, 2016
  9. Rigmarol

    Rigmarol Well-Known Member

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    I spoke with Kevin at Robo and he read through this thread. Thanks again guys for the help.

    He's thinking it's related to the Hotend Heater Core or the Wire Harness for the Thermister.

    He's sending me both and an extra thermister in case I gorilla grip it again.

    Should get to me by next Monday or Tuesday. (3-4 days)
     
    #69 Rigmarol, Jun 2, 2016
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  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Sweet, that should kill it:)
    If that fails all that is left are the electronics bits.
     
    #70 mark tomlinson, Jun 2, 2016
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  11. Rigmarol

    Rigmarol Well-Known Member

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    Parts arrived yesterday. I was hoping to get to changing them out today but it didn't work out. I'm hoping to get to it tomorrow.
     
    #71 Rigmarol, Jun 11, 2016
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  12. Rigmarol

    Rigmarol Well-Known Member

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    I changed out each of the 3 parts I was sent; thermister, heater core an the harness for the thermister. I was expecting a harness for the heater core too but that wasn't one of the parts I was sent.

    Still showing 230C when cold, but still heating up to an arbitrary number when preheating.

    I will be contacting support to let them know next.
     
    #72 Rigmarol, Jun 12, 2016
  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    About the only part left is the RAMPS board itself.
     
    #73 mark tomlinson, Jun 12, 2016
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  14. Rigmarol

    Rigmarol Well-Known Member

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    Looks that way. But I understand ruling out the parts we tried.
     
    #74 Rigmarol, Jun 12, 2016
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  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The RAMPS and Arduino are fairly rugged.
    They are seldom the actual problem, but you have pretty much ruled everything else out.
    If you swap the thermistor connection on the RAMPS (swap the bed and extruder thermistors where they connect to the RAMPS) that would absolutely prove it. If the problem moves then it is still the thermistor or wiring, but if it does not then the RAMPS is the guilty party.
     
    #75 mark tomlinson, Jun 12, 2016
  16. Geof

    Geof Volunteer Moderator
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    I believe we already did that togather. Make sure you let support know you have tried that so they understand everything.
     
    #76 Geof, Jun 12, 2016
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  17. Rigmarol

    Rigmarol Well-Known Member

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    Yes we did that earlier. I have told them as well as linked to this forum thread.
     
    #77 Rigmarol, Jun 12, 2016
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  18. Geof

    Geof Volunteer Moderator
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    Very good !
     
    #78 Geof, Jun 12, 2016
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  19. Geof

    Geof Volunteer Moderator
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    @Rigmarol how are you getting along buddy
     
    #79 Geof, Jun 15, 2016
  20. Rigmarol

    Rigmarol Well-Known Member

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    Im in contact with support, its tough because their work hours are the same as mine so i have to get instructions, try them and report the next day.
    The latest is they had me repeat the switching of T1 and T0 like we've already. No change, waiting on reply.
     
    #80 Rigmarol, Jun 15, 2016
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