silicone heat bed tuning
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i have hooked my duet2 wifi to my 12v powers supply,and 750w silcone bed via a ssr. how do i fine tune the heat bed in the config files?
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You should run a PID tuning cycle on it.
https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control
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this is what i recievedfor the M303 H0.
M307 H0
Heater 0 model: gain 317.3, time constant 665.7, dead time 9.8, max PWM 1.00, calibration voltage 12.1, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P38.0, I0.470, D262.1
Computed PID parameters for load change: P38
M303 H1
PMM307 H1
Heater 1 model: gain 898.2, time constant 180.8, dead time 2.9, max PWM 1.00, calibration voltage 11.9, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P12.4, I0.541, D25.2
Computed PID parameters for load change: P12. -
750W at 12v is about 60A. That's very high current and not a very common combination. what kind of wires are you using there?
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He is using the 12V signal to control an SSR that switches a line voltage heat bed on and off. He is not using 12V for the actual heat bed.
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@jens55, I see, this is a AC mains heater. Makes more sense.
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@tdybare69 said in silicone heat bed tuning:
this is what i recievedfor the M303 H0.
M307 H0
Heater 0 model: gain 317.3, time constant 665.7, dead time 9.8, max PWM 1.00, calibration voltage 12.1, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P38.0, I0.470, D262.1
Computed PID parameters for load change: P38That sounds reasonable (the PID parameters for load change have been truncated). You will get a warning about the temperature that might be reached at continuous full power, because of the high power of your bed heater; so you should include a thermal cutout in the bed heater circuit.
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@zapta 14GA
