Chamber heater settings question
I’ve added a DIY chamber heater based on a bath heater.
- I have a temperature sensor on above toolhead 0 (sensor pin PF4);
- a sensor in front of the heater (sensor pin PF5);
- a 12V fan connected to PE5;
- a 40A SSR connected to PA2 and to the heater.
My printer.cfg settings are:
and "True" to
variable_chamber_heater_control_external_heater: True
Is it correct that if I set the target for chamber heater to 60°C when the sensor in front of the heater reaches 60°C sets the heater power to 0%?
I would expect to see 0% when the top sensor reaches 60°.
11 Replies
Nope. That sensor only checks the temp on the heater. The one controlling chamber temp is the other one (on PF4)
and that sensor just in front of the heater may not last long...
You are right, it is already dead and indicates -21°C 🤦♂️. A better place to monitor the heater temperature for the next sensor?
If you can open the heater, glue it to the side of the fins
I’ve replaced the heater temperature sensor with a PT1000. The behavior is still the same: if I set a target temperature, when the heater sensor reaches this temperature cuts the heater power but the chamber sensor is still cold (eg. 34.1°C).
That's exactly what it should do. So, the heater will be "floating" around the set 80 until the chamber reaches the required temp.
If the heater is good and tough, you can set it's temp a bit higher
Ah, OK, so it's only the slicer that defines the chamber temperature, I can't set it manually. Thanks
You can send the same command in the console
What is the correct command? I’ve tried but…
Solution
CHAMBER_HEATER_ON CHAMBER_TEMP: whatever you want
It works, thanks:
You welcome