Duet 6XD thermosistor Issue

[Addithy]

Hello

I'm currently configuring 4 thermistors and I have an issue.
Temp0 and Temp1 show 20, and the Temp2 and Temp3 shows 25. If I check with the same sensor. All ports are configured the same.

M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Nozzle"

M308 S1 P"temp1" Y"thermistor" T100000 B3950 A"Heat Zone 1"

M308 S2 P"temp2" Y"thermistor" T100000 B3950 A"Heat Zone 2"

M308 S3 P"temp3" Y"thermistor" T100000 B3950 A"Heat Zone 3"

Can someone help?

[droftarts]

@Addithy It sounds like you may need to calibrate the temperature ADCs. See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Temperature_connecting_thermistors_PT1000#temperature-calibration-and-adc-tuning

Note that:

Duet 3 Mainboard 6HC and 6XD have two banks of ADC inputs, and sometimes exhibit different errors on different ADC banks. The on-board hardware can only apply the same compensation to both banks. As a result, the hardware self-calibration isn't perfect.

Ian

[Addithy]

@droftarts thank you for the quick response I will try that.