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Solved Heatbed max temp at 80c

Discussion in 'Troubleshooting' started by SteveB, Sep 8, 2016.

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  1. SteveB

    SteveB New Member

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    I have had my 3d for a couple of months now. Installed upgrades including the E3D v6 hotend. Everything has been a learning curve but I have gotten comfortable printing in PLA. So figured I would try ABS. Started hotend temp of 235c and heatbed at 80c with no problems ( other than warping). Then bumped up heatbed temp to 90c on the next print and get the maxtemp error during preheat. I tried different temps but 80c is the highest temperature that won't give me an error. Any ideas? I have made no mods to the bed.
     
    #1 SteveB, Sep 8, 2016
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yes, there was a version of the firmware with this limit due to the way the bed was powered.
    Do you have the ribbon cable running to the bed? If so you can safely increase the firmware limit.
     
    #2 mark tomlinson, Sep 8, 2016
  3. SteveB

    SteveB New Member

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    Yes I do! What line do I change in the firmware?
     
    #3 SteveB, Sep 8, 2016
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    // When temperature exceeds max temp, your heater will be switched off.
    // This feature exists to protect your hotend from overheating accidentally, but *NOT* from thermistor short/failure!
    // You should use MINTEMP for thermistor short/failure protection.
    .
    .
    #define BED_MAXTEMP 110

    The last one there in bold.
    This is in CONFIGURATION.H
     
    #4 mark tomlinson, Sep 8, 2016
  5. SteveB

    SteveB New Member

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    Thanks for the help, I'll fix that when I get home.
     
    #5 SteveB, Sep 8, 2016
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    With the ribbon cable you can safely go as high as that. You will eventually run out of watts on the power supply if you push it much more :)
     
    #6 mark tomlinson, Sep 8, 2016
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