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Solved Build platform on my R1 stopped heating.

Discussion in 'Troubleshooting' started by Gomo2017, Jul 22, 2017.

  1. Gomo2017

    Gomo2017 New Member

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    I have been building ABS parts very nicely for three months and have just now switched to PLA. On my third PLA part the print bed stopped heating all together. It had finished a part and so I uploaded another print file but it just sits there waiting for the bed to heat. I tried to preheat but it still won't work. I even changed to another computer to eliminate the possibility that the program may be flawed. Does any one know how to fix it?
     
    #1 Gomo2017, Jul 22, 2017
  2. Geof

    Geof Volunteer Moderator
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    First guess would be a ramps failure on the q3 mosfet. Remove the bottom cover and pull the green plug off the ramps board, is it burnt ? Typically it's a replacement ramps board needed
     
    #2 Geof, Jul 22, 2017
  3. Gomo2017

    Gomo2017 New Member

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    I looked at the green plug and it has no sign of being burnt, also no other components look burnt. Not ruling that possibility out, thanks for the advice.
     
    #3 Gomo2017, Jul 23, 2017
  4. Geof

    Geof Volunteer Moderator
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    So if not a connector failure it's likely a failure at q3 mosfet (replace the ramps). You can verify by checking you have 12vdc on the heatbed circuit input
     
    #4 Geof, Jul 23, 2017
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  5. Geof

    Geof Volunteer Moderator
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    what temp does your bed show on power up?
     
    #5 Geof, Jul 23, 2017
  6. Gomo2017

    Gomo2017 New Member

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    The heat bed circuit input measures 12.15 Vdc and the starting temperature is 26.4, the same as the nozzle temperature.
     
    #6 Gomo2017, Jul 24, 2017
  7. Geof

    Geof Volunteer Moderator
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    Q3 failure on the ramps board.

    edit: replacement ramps is needed.
     
    #7 Geof, Jul 24, 2017
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  8. Gomo2017

    Gomo2017 New Member

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    OK thanks, I will look into getting one. Although this printer is still under warranty I don't think I should paying for it. I've only owned it for 3 months.
     
    #8 Gomo2017, Jul 24, 2017
  9. Geof

    Geof Volunteer Moderator
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    agreed. If you bought it new call them and request a new board.
     
    #9 Geof, Jul 24, 2017
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  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    So call them up and request a replacement (I think they have a replacement part request form on their web site too).

    If you do decide to get one they are about $15 US on amazon (although it is smarter to just spend $40 and get the kit that has all of the electronics and an LCD).
     
    #10 mark tomlinson, Jul 24, 2017
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  11. Jacob B.

    Jacob B. New Member

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    Had this just happen last week w. my Robo R1 - the positive wire had been pulled-ever-so-slightly out of the heater, just slightly enough that you couldn't see it, but it was no longer connected. I simply re-soldered it and all was well - you might want to check that before ordering a new part (just give the wire a gentle tug)
     
    #11 Jacob B., Jul 26, 2017
  12. Geof

    Geof Volunteer Moderator
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    I'm not sure with how cheap heaters are that I would bother trying to repair them, much safer to replace it than to try to fix them :D
     
    #12 Geof, Jul 27, 2017

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