3.4.0beta7 - RC2 overheating when the model fan is turned on

Del87

There are some strange behavior on heater when the model fan turns on high/low speed.
Firmware 3.4.0beta6 - straight line temperature, maximum deviation +0.5 degree when model fan 100%.
Firmware 3.4.0beta7-3.4.0RC2 - +1 degree on 2-3 layers of the model (fan 15-30%). +2 degree when model fan 100%.
PID calibration new/old doesnt matter - same behavior.
Duet 3 mini 5+ Pt1000
And a small note: same models printed 3.4.0beta6 - no messages about driver0 stuck , 3.4.0RC2 - there was messages. I use sensorless homing, is there some changes mentioned in upgrade notes?

Phaedrux

Can you give us some more information on your setup. Heaters, etc.

Can you share your config.g and your PID tune values?

What is the exact driver error message?

@del87 said in 3.4.0beta7 - RC2 overheating when the model fan is turned on:

There are some strange behavior on heater when the model fan turns on high/low speed.
Firmware 3.4.0beta6 - straight line temperature, maximum deviation +0.5 degree when model fan 100%.
Firmware 3.4.0beta7-3.4.0RC2 - +1 degree on 2-3 layers of the model (fan 15-30%). +2 degree when model fan 100%.
PID calibration new/old doesnt matter - same behavior.
Duet 3 mini 5+ Pt1000
And a small note: same models printed 3.4.0beta6 - no messages about driver0 stuck , 3.4.0RC2 - there was messages. I use sensorless homing, is there some changes mentioned in upgrade notes?

About same issue for me with the RC1, look here: https://forum.duet3d.com/topic/27533/temperatures-totally-wrong

Del87

@phaedrux
All pid tuning by M303 T0 S235
Pid parameters after tuning on firmware RC2:
M307 H1 R2.017 K0.304:0.121 D5.56 E1.35 S1.00 B0 V23.8
Old parameters firmware beta6 (works great):
M307 H1 R2.096 C266.944:211.319 D5.59 S1.00 V23.9 B0 I0
config.g

I guess it is all about the model fan cooling compensation, beta6 perfect for me, later ones are much worse.

driver0 a lot of reports about stall detection on one Z height (didn't copy it). Old firmware - no reports, same gcode.

Dogma2k

And the same i said here
https://forum.duet3d.com/post/270688

Del87

3.4.rc2+2 pid works stable. But the problem with driver stuck is actual. There was the message about driver 0 and 1 (X Y) stuck then motor Y (h-bot configuration) stopped working. Firmware 3.4.beta6 no messages, no problems with stucks, sensorless homing, motors.

What changes in motor/driver or sensorless settings was made after beta6 firmware?

no such messages on firmware 3.4.beta6.

Del87

some new investigations:
G28 via console - no error messages
G28 in gcode (only one command). Error messages after this gcode start printing.

homeall.g

Phaedrux

@del87 Can you start a new thread with your details for this issue?

Del87

@phaedrux okay