Problems with Pt100 from Chimera

Discussion in 'Multi-Extrusion' started by Takato, Mar 13, 2017.

  1. Takato

    Takato Member

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    I bougth Chimera extruder for upgrading my prusa i3. Howeber, after changing Marlin code I can't work with printer due to Pt100 are failing.

    I conected them to the amplifier board and on my screen I got that printer halted because the temperature was too high. After throwing away the idea of a failure of the amplifier, I measured the value from Pt100, both were arround 170 and 130 kohms respectively. Obviously, it is a very high value for a Pt100 resistor at room temperature.

    What can I do? I haven't used them yet along with the heater cartridges and I have only placed them.
     
  2. tohara

    tohara Well-Known Member

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    If you ordered a PT100 you probably got the wrong cartridge. Sounds like you have the 100k NTC thermistor.
     
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  3. Takato

    Takato Member

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    Yes, it seems that they have sent me the 100k NTC thermistor (they could have indicated the one that they usually send, because now I have two nice useless amplifier boards for Pt100).
    Howeber, I still have this problem. As you can see, there is a 6 degrees diference, which is a too high error for this purpouse. I think one of the thermistors is not working.

    IMG_1140.JPG
     

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