DangerKlippers/danger-klipper

[Question] Possible to heat one element with two heaters and two thermistors?

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RoboticKoala commented

Hello! I'm making a custom printer that's extruding some strange material (sorry cannot say much) and I plan to have an extruder with two cartridge heaters and one (or maybe two) thermistors. The cartridge heaters will be the same and I would like to control it with one input, do you think this would be possible? And if I used two thermistors to take the average value from them to determine the temperature?

I looked on some online forums and they reccomended using danger klipper. Thank you for your help and time, I appreciate it loads and am looking forward to your responses. Thank you again!!

rogerlz commented

Hey!

DK does not have anything specific to your requirements, but I believe you can already achieve what you need with existing features.

A few options:

[multi_pin heater]
pins: PB4,PB5

[extruder]
heater_pin: multi_pin:heater
  • temperature_combined sensor to combine and average two temperature sensors Config Reference
[temperature_sensor heater_sensor1]
sensor_type: PT1000

[temperature_sensor heater_sensor2]
sensor_type: PT1000

[extruder]
sensor_type: temperature_combined
sensor_list: temperature_sensor heater_sensor1,heater_sensor2
combination_method: mean
maximum_deviation: 20.0
  • generic_heater to have a second heater instance with an independent sensor and pid control Config Reference
[heater_generic extraextruder]
gcode_id: X
heater_pin:
sensor_type:
sensor_pin:

and then add SET_HEATER_TEMPERATURE to your PRINT_START / PRINT_END macros.

RoboticKoala commented

Wow! That's awesome! Thank you for your help, I appreciate it! I'll try it!

rogerlz commented

Sure! feel free to reopen or ping me on discord if you need help

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