E3D V6 original Temperature problem

  • Hi,
    I had an original E3D v6 with original thermistor, and I'm at the latest firmware (3.1.1) for my Duet 2 WiFi.
    I had a problem with the temperature, in fact if I use the original setting (down below) the real temperature is 20 C lower than the one set, how can I fix this?

    M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8

    At the moment I fix it increasing the B parameter like so:

    M308 S1 P"e0temp" Y"thermistor" T100000 B5000 C7.06e-8

    Thank You

  • Try to use R parameter, so M308 S1 P"e0temp" Y"thermistor" R4700 T100000 B4725 C7.06e-8

  • Moderator

    The correct R value is known by the board (unless you're using an older Duet0.6) so you don't have to specify it.

    The values you list seem to match what E3D recommends, so I'm not sure where the discrepancy is coming from.

    What temp are you trying to set? How are you measuring it to validate? Is it correct at room temp?

  • @Phaedrux
    I followed the E3D guide but it was to low, my room temperature is 25 C and I measured the hotend temp with a K-type sensor.
    I had tried several temperatures (from 200 to 245 C) and with a B4725 the result was off by 12 to 20 degrees. Now I had found a good spot at B5000.
    I don't know if but at the moment it is working so I don't touch anything.
    Thank you all for the support

  • I'm curious. Is your problem with the original E3D V6 thermistor that goes under the screw or with the newer original E3D V6 thermistor cartridge?

    Unless I'm remembering something wrong, there used to be different B values for the thermistor before they switched to the thermistor cartridge. Or it was different B values with older RepRapFirmware configurations.

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