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New "temperature_combined" feature in Klipper to cool the Voron 0

Mark.Dunn

New member
I noticed a new feature in Klipper that has an application on the Voron 0

The Voron 0.2 added a fan in the rear compartment and this configuration turns on the fan in the rear compartment if either the host (Raspberry PI) or the mcu (SKR-Pico) get hot.

Modifying the printer.cfg:

Code:
#####################################################################
#      Temperature Sensors
#####################################################################
[temperature_sensor SKR_Pico]
sensor_type: temperature_mcu


[temperature_sensor Raspberry_Pi]
sensor_type: temperature_host


#####################################################################
# Processor Fan Control
#####################################################################
[temperature_fan processors_maximum]
pin: gpio20                                                       # the fan control pin (must be a mosfet or a pwm fan)
control: watermark                                                # the type of hysteresis we are using
max_delta: 3.0                                                    # fan turns on/off at 3° over/under target_temp
sensor_type: temperature_combined                                 # new temperature type
sensor_list: temperature_sensor SKR_Pico, temperature_sensor Raspberry_Pi
combination_method: max                                           # use the maximum reading of the sensors
maximum_deviation: 999.9                                          # we don't care about the difference in temperature
max_temp: 85                                                      # just the valid temperature ranges
min_temp: 0
target_temp: 57.0                                                 # the initial target temperature for the fan
max_speed: 1.0
min_speed: 0.3
 
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