Bed PID tuning and M307 settings
I am pulling my hair out.
Duet3 Mini 5+ board - makes no difference
I have big bed that takes time to heat up.
fairly slow. it bombs out when heating.
I run PID tune. It gives the result, but complains that it was inconsistent.
Warning: heater behaviour was not consistent during tuning Auto tuning heater 0 completed after 4 idle and 25 tuning cycles in 3341 seconds. This heater needs the following M307 command: M307 H0 R0.246 K0.857:0.000 D2.04 E1.35 S1.00 B0 Send M500 to save this command in config-override.g
I add the settings into the config and straightaway it gives me an error when I am trying to heat it up
Error: Heater 0 fault: temperature rising too slowly: expected 2.18°C/sec measured 0.22°C/sec.
I tried changing R and D values - makes no difference at all. Expected rise value is still the same and always gives me an error.
do you guys have any ideas?
Phrayzur last edited by
@aurimas I've been having the same problem... Check this post out...
How big is the bed? How powerful is the heater?
What values did you try for D?
@phaedrux as I said in the description - it is big. But it doesn't matter. After PID tune it should respond properly, but it doesn't. And that's the problem.
I have tried R values from 0.001 to 5 and D from 0.5 to 100.
The expected rise value is not changing and that is the problem
@phrayzur not related. I have done PID tune already - no good