Rat Rig Community [Unofficial]•7d ago

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:

[temperature_sensor chamber]
sensor_type: ATC Semitec 104GT-2
sensor_pin: PF4

[heater_generic chamber_heater]
gcode_id: chamber_heater
heater_pin: PA2
smooth_time: 10
sensor_type: ATC Semitec 104GT-2 #PT1000
sensor_pin: PF5
#control: pid
#pid_kp: 24.750
#pid_ki: 2.578
#pid_kd: 59.400
pwm_cycle_time: 0.25
min_temp: 0
max_temp: 200
max_power: 1.0

[heater_fan chamber_heater_fan]
pin: PE5 #Fan 1 12V
heater: chamber_heater
heater_temp: 40

[temperature_sensor chamber]
sensor_type: ATC Semitec 104GT-2
sensor_pin: PF4

[heater_generic chamber_heater]
gcode_id: chamber_heater
heater_pin: PA2
smooth_time: 10
sensor_type: ATC Semitec 104GT-2 #PT1000
sensor_pin: PF5
#control: pid
#pid_kp: 24.750
#pid_ki: 2.578
#pid_kd: 59.400
pwm_cycle_time: 0.25
min_temp: 0
max_temp: 200
max_power: 1.0

[heater_fan chamber_heater_fan]
pin: PE5 #Fan 1 12V
heater: chamber_heater
heater_temp: 40

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°.

3 Replies

MDFPereira•7d ago

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...

Teo_OP•6d ago

You are right, it is already dead and indicates -21°C 🤦‍♂️. A better place to monitor the heater temperature for the next sensor?

MDFPereira•6d ago

If you can open the heater, glue it to the side of the fins

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Chamber heater settings question

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