Hot end temp – very high value.

This topic contains 3 replies, has 2 voices, and was last updated by Profile photo of Jeremy Jeremy 11 months, 2 weeks ago.

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  • #7328
    Profile photo of Jeremy
    Jeremy
    Participant

    I have spent the past several days trying to set up my MPCNC as a 3D printer. Today I finally received my hot end from amazon. After I connected everything the hot end temp reads 475.80c. The thermistor is plugged into T0 into the Ramps 1.4 board

    Before I plugged in the thermistor the reading was 499, but I was just using my DW660 and didn’t think anythign about it.

    Originally I was using the Beta firmware (B16_32_fullG-112515), then changed to Marlin_16_32_090615_therm and repetier didn’t like the high value the thermistor was sending out and gave an error.

    Now I am back to B16_32_fullG-112515

    Are there additional changes I need to make somewhere?

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    #7344
    Profile photo of Jeremy
    Jeremy
    Participant

    It seems that my low cost Geeetech Ramps 1.4 thermistor may be the problem. Anyone know what Temp Sensor I should set it to in marlin Configuration.h?
    #11 didn’t work,
    #1 was suggested on the Geetech Wiki for markin settings, but it only read 24c when melting ABS

    I really don’t want to compile this 100 times to try them all.

    Thanks again for your help.

    #7361
    Profile photo of vicious1
    vicious1
    Keymaster

    There might be a way to test the resistance and figure it out that way. I am not sure it took me more than 5 tries to figure out #11 worked for the extruders I sell.

    #7378
    Profile photo of Jeremy
    Jeremy
    Participant

    It looks like its 100Ω at 77f. according to my multi-meter.

    I’ll keep trying different settings.

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