Temperature differences in double extruder system
-
Good morning, I'm almost done with my double extruders setup (Original Chimera +) but I've noticed that there are about 2,5° of difference between the temperature readings by sensor 0 and sensor 1. The correct reading seems to be the sensor 0 (both of them are E3D original themristors). I've noticed this issue when I first start the printer with both oh the hating block at environmen temperature.
How can I "compensate" via GCODE the temperature readings to make both of them the same and, of course, as close as possible to the real temperature?
Thanks
Andrea -
A small variation between two sensors isn't unheard of or unexpected, especially at low temps. Getting the display temp as close to actual temp as possible just entails using the correct thermistor parameters which should be easy if they are E3D parts.
-
I assume you are using exactly the same M308 parameters for both thermistors.
Try swapping the thermistor inputs over:
-
If the low reading moves with the thermistor, then the thermistors have slightly different resistances. Adjust the R parameter of the M308 command for one of them.
-
If the low reading stays with the input on the Duet, then the ADC calibration can be adjusted. See https://duet3d.dozuki.com/Wiki/Calibrating_thermistor_and_PT1000_readings.
-
-
@dc42 said in Temperature differences in double extruder system:
I assume you are using exactly the same M308 parameters for both thermistors.
Try swapping the thermistor inputs over:
-
If the low reading moves with the thermistor, then the thermistors have slightly different resistances. Adjust the R parameter of the M308 command for one of them.
-
If the low reading stays with the input on the Duet, then the ADC calibration can be adjusted. See https://duet3d.dozuki.com/Wiki/Calibrating_thermistor_and_PT1000_readings.
Thanks! Yes, I have the same M308 parameters for both the thermistors. This evening I'll try to fix the problem using your suggestions!
Thanks!
-