Thermal anomaly /error  

RE: Thermal anomaly /error

Posted by: @mare

Hey guys, 
need some help.

Just bought an used MK3S+ (only original parts) it has the newest FW 3.13.1 installed. 
At the first days it printed very well. Now I´m continously getting THERMAL ANAMOLY and ERRORS. 
Room conditions: 20.5 °C, ~ 50 % humidity 

I found a git hub topic for that issue (but regarding using third party hotends. I ran the command M310 M155 S1 C3 D70 I1 M310 A via OctoPrint and initiated some testing. It failed with load beeping (output of it is attached).
I would really appreciate your help.

OctoPrint Terminal Output

I have the same problem

RE: Thermal anomaly /error

I recently had this with a print, it happened twice on the same print and I couldn't see where the problem was occurring.  Looking at my Octoprint graph I saw nothing there, but I did scour this forum and found a document that recommended running Thermal Model Calibration.  You get to the via Calibration -> Thermal Model Calibration.

I ran it yesterday and did 1 print afterwards and it was fine, but it was a small print so I may not have printed long enough.  We'll see.

Cheers

-Bob

RE: Thermal anomaly /error

This problem started after an update which coincided with moving the printer to a different location, so I didn't consider it could have been related to the firmsare update and not the move.  Read several postes on silimar threads here and was about ready to purchase a new hot end when I decided to try downgrading firmware to 3.11.0.

I downloaded it from Prusa, then flashed it to the i3 MK3 S+.

Once the new firmware was onboard, had to to re-calibration, then z-offset Cal, but the setting value was same as I had before.

after that, started a 3 hr print, and no issues.

Hint, Document your z-offset!
Buy a digital Caliper and measure the print from the z-offset Cal Print to confirm.

Jim

RE:

I’m not sure if there is some process we aren’t doing on our MK3S+, but after reading copious posts on users with MK3S printers having to downgrade to 3.11, I’ve lost faith in firmware updates past that. However, I think you can now disable the thermal calibration.. but not sure.. maybe you can only do it with a gcode addition.

RE: Thermal anomaly /error

Purchased the MMU3 for my son for Christmas, I was reading through the manual, and first step is to updrage the firmware to the latest version.  No I have concerns about issue with the MMU if the firmware is not current.  If I upgrade it we'll revert back to the thermal anomoly issue.

I did also get a Raspberry Pi so we can set up Octoprint, which will hopfully provide additional flexibility in tweaking the config.

RE: Thermal anomaly /error

After updating from an older firmware to the current 3.14.1 the printer is unusable due to the termal abnormaly /error. I am using a titan heatbreak for years without any problem. Now the printer gets unusable.

@prusa Software developer: Please release a firmware where the thermal calibration is working with 3rd party heatbreakes with different thermal behavior.

Kind Regards
ix

RE: Thermal anomaly /error

Posted by: @ixtrader

After updating from an older firmware to the current 3.14.1 the printer is unusable due to the termal abnormaly /error. I am using a titan heatbreak for years without any problem. Now the printer gets unusable.

@prusa Software developer: Please release a firmware where the thermal calibration is working with 3rd party heatbreakes with different thermal behavior.

Kind Regards
ix

Sorry to hear that. The Thermal Model (TM) is quiet sensitive but also from the beginning very flexible for custom mods.

With the LCD TM calibration you get the values specific to your stock or REVO modified printer.

Other mods need to run the TM and PID calibration manually, as described in https://help.prusa3d.com/article/thermal-model-calibration_382488 but with 

M310 A F0

to ignore the current settings.

A small group of REVO users and E3D provided some default values and we were able to get a "baseline" for the REVO, see https://github.com/prusa3d/Prusa-Firmware/issues/4105

Please understand that Prusa can't provide firmware for any possible combination of mods. There are way too many possible combinations, different heatbreak, different block, different nozzle material, different fans, different heater cartridges, different environment, etc.

Any component that could change the Thermal behavior will have an impact on the TM. 

That's why TM has been from the beginning "customizable" by using gcodes, see https://reprap.org/wiki/G-code#M310:_Temperature_model_settings

There is also a https://github.com/prusa3d/Prusa-Firmware/blob/MK3/Firmware/variants/README.md for 3rd party companies to provide the correct values.

Frankly I haven't seen yet one 3rd party company (except E3D for the REVO) to provide these values for their customers.

RE:

Posted by: @mare

Hey guys, 
need some help.

Just bought an used MK3S+ (only original parts) it has the newest FW 3.13.1 installed. 
At the first days it printed very well. Now I´m continously getting THERMAL ANAMOLY and ERRORS. 
Room conditions: 20.5 °C, ~ 50 % humidity 

I found a git hub topic for that issue (but regarding using third party hotends. I ran the command M310 M155 S1 C3 D70 I1 M310 A via OctoPrint and initiated some testing. It failed with load beeping (output of it is attached).
I would really appreciate your help.

OctoPrint Terminal Output

The `M310 M155 S1 C3 D70 I1 M310 A`should be separated. Please also update to FW 3.14.1 and maybe a factory reset is useful as well.

M310 ;Show current TM values
M155 S1 C3 ;Enable autoreport for temperatures and fans
D70 I1 ;Additional TM DEBUG 
M310 A ;Run TM calibration