@deler said in Bed heater PID:
@dc42 said in Bed heater PID:
@deler said in Bed heater PID:
Another question came to my mind, do I need to do any PID tuning? if yes how can I do that?
Yes. Look up M303 on that same GCode wiki page.
after the tunning, I got the following results
Heater 0 model: gain 207.8, time constant 143.4, dead time 4.4, max PWM 1.00, calibration voltage 12.2, mode PID, inverted no, frequency defaultalso, I got a warning: heater 0 appears to be over-powered. if left on at full power, its temperature is predicted to reach 232c.
is it normal?
Yes. Head the warning and don't leave the printer unattended for lengthy periods of time. In the unlikely event that a Mosfet or your SSR failed closed, then your bed could reach a temperature of 232 deg C.
If you are concerened, then you can either use a lower powered heater or fit a thermal cut out switch.