Chamber Heater Control

[Nazar]

Hello, I need advice.

I am using a chamber heater similar to this one. My chamber temperature sensor is located on the surface of the heater itself. Then readings from the sensor are used to maintain the surface temperature by SSR.

Is this possible to use a second temperature sensor located inside the build chamber to turn the heater on and off while still having the first sensor attached to the heater?

[Phaedrux]

Yes, you could use daemon.g and conditional gcode to monitor the second sensor and act accordingly.

https://duet3d.dozuki.com/Wiki/GCode_Meta_Commands
https://duet3d.dozuki.com/Wiki/Object_Model_of_RepRapFirmware

[T3P3Tony]

have a look at this:
https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_a_chamber_heater#Section_Using_multiple_temp_sensors_for_a_single_heater

as @Phaedrux suggests this can be customised with conditional gcode but you can also achieved using M143

e.g.

M143 H1 P0 S60 T2 A2 ; switch off heater 1 temporarily if it exceeds 60°C, using temperature sensor 2 to control this.

That will mean the heater gets switched off every time temperature sensor 2 temperature gets above 60C