Lots of heater fault since RRF 3.4

e4d

Hello, I updated to RRF 3.4 a few days ago and I now have a lot of heater fault (eg : Error: Heater 0 fault: temperature rising too slowly: expected 0.63°C/sec measured 0.10°C/sec). I already tried retuning the PID with M303 command but it doesn't change this behaviour. Is it something known in this version ? How can I correct this ?

jay_s_uk

@e4d did you try tuning as a heater or a tool? what type of hotend is it? can you post a photo? does it have a sock on?

e4d

@jay_s_uk I used M303 T0 S210, so I guess I tuned it as a tool.

My tool is a classic E3D Toolchanger bowden tool but I don't have the sock on. Never had for a year now and it worked great so I'm not sure why this would be the cause.

jay_s_uk

@e4d i would suggest not having a sock is the cause

Miss Rebekah

did you store your values with config over ride or actually add it to main config? i use 3edv6 w 60 watt heater no sock never used a sock not gonna start . i have a wire brush that deploys and scrubs nozzle at start of every print sock would last long. i was over shooting by 20 degrees

i deleted config override and added autotune code into main config works fine now. autotune will give you a line of code in the console when its done add/replace that where your heater is at in config. dunno why m500 wasn't sticking for me.

hope this helps

e4d

@miss-rebekah Hello, I put it in the main config file. It has been rebooted several times since the begining so I'm sure it has been executed

dc42

@e4d do you get that error when heating the tool from cold, or when it is already warm (and if so, at what temperature)?

I just tried re-tuning one of my Bowden tool changer hot ends (with silicone sock) using RRF 3.4. This was the resulting command:

M307 H2 R2.077 K0.385:0.112 D5.52 E1.35 S1.00 B0 V24.1

The R value is a little higher than I was getting with older version (it was about 1.8 before). The other values are similar. I didn't have any problem heating it to 205C starting from 35C.

e4d

@dc42 I have it while printing at 210C. Here's my tuning :
M307 H1 R2.096 K0.441:0.084 D5.95 E1.35 S1.00 B0 V24.3
Pretty similar to your values

oliof

Thats heater 0 so the bed heater, not the tool heater?

jay_s_uk

@oliof so it is, my mistake. Although there is a bug in 3.4 (that was fixed in 3.4.1-RC1) where the heater 0 was being reported as having a fault regardless of which heater actually had the fault.
Maybe @e4d can confirm which he was heating at the time the fault occurred

dc42

@e4d said in Lots of heater fault since RRF 3.4:

@dc42 I have it while printing at 210C.

The error you reported was "temperature rising too slowly". That is usually generated only when the tool is heating up initially. So do you mean that you get the error when heating up? Or do you get a different error when printing?

e4d

@dc42 I have the error in around 1 in 10 prints when I'm actually printing. I always pre-heat the head before starting the print, the heating process don't give me error. But sometimes I have "temperature rising too slowly" error during the print (could be already an hour in).

oliof

@e4d do you have a screenshot of the temperature plot shown in DWC when that happens?

dc42

@e4d if you have "temperature rising too slowly" during a print that means there has been a substantial temperature drop during the print. The most likely cause is sudden additional cooling from the print cooling fan caused by the geometry of the print. A silicone sock may fix that.