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MK3S Thermal Anomaly on Firmware 3.13.2  

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Sparker5016
(@sparker5016)
Active Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

Thanks for the info.  Sorry for the late response.  The problem has been solved.  It was a faulty heater core.  The only thing that I could see was a slight bit of fraying of the insulation where it goes into the wire loom; not broken wires or shorting out, however after replacing the heater core firmware 3.14 went in great, printer passes all tests, printing.  The heater core worked with 3.11 but not 3.14; you tell me.  One of the engineers at E3D recommended replacing the heater core.  All I know is, these are the facts.  I don't make the news, I just report it.  LOL.  Thanks again

Publié : 22/07/2024 4:53 pm
Allen8355
(@allen8355)
Estimable Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

There are countless posts from people "fixing" the problem by either changing the heater core or changing the thermistor, but those only "fix" the problem because the "thermal model" is just so overly sensitive that changing the heater or thermistor changes things enough to stop the error, for now.  Your not fixing the problem, just covering it up.  Try 10 different heater blocks and 10 different thermistors, and I bet it will return for a few of each. The fact is, there was no "thermal model before 3.12, and the MK3S worked fine.  The best solution is to deactivate the "thermal model" that doesn't work correctly.  An M310 S0 in start code will do it.  An M500 will save it so its permanently off.   Connecting a computer to the printer and sending these commands does it, but just adding them to GCODE does it as well.

Publié : 25/07/2024 9:01 pm
Sparker5016
(@sparker5016)
Active Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

Thanks so much for the info.  Sure enough changing the heater core "fixed" it for now.  I guess time will tell.  What an ordeal.  I'm 72, buy a Prusa, not the kit because I don't want to work on it.  Well, 18 or so months later, the linear rods are scratched so you may as well change the bearings and rods at the same time: then the Revo Six issue that was sold as the Prusa edition hot end.   It's all good.  I'm up and running.  What doesn't kill you only makes you stronger.     

Publié : 25/07/2024 9:38 pm
Allen8355
(@allen8355)
Estimable Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

If it happens to return, now you know how to eliminate the problem.  I have no idea why PRUSA, suddenly at their end-of-life for this printer, suddenly felt the need to add this "thermal model" to their firmware, without seemingly fully testing it.  It "seems" they added it just when people were switching to REVO hotends. Maybe to get people to upgrade to a MK4??? I don't know. Just a thought. 

Publié : 25/07/2024 9:52 pm
Sparker5016
(@sparker5016)
Active Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

Heavy is the head of he who wears the crown.  For a long time Prusa was King of the Hill; now so much anymore.  As fast as the 3D printer technology is evolving Prusa had to come up with something new.  The MK4 almost came out....  outdated.  It's good and bad reviews on the new release.    

Publié : 25/07/2024 10:26 pm
Robin_13
(@robin_13)
Reputable Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

 

Posted by: @allen8355

If it happens to return, now you know how to eliminate the problem.  I have no idea why PRUSA, suddenly at their end-of-life for this printer, suddenly felt the need to add this "thermal model" to their firmware, without seemingly fully testing it.  It "seems" they added it just when people were switching to REVO hotends. Maybe to get people to upgrade to a MK4??? I don't know. Just a thought. 

From my experience, this is a safety issue.  Just before this "feature" appeared, I had my head melt.  According to the developers, this wouldn't have happened under the firmware as it would have detected the error.  I have my doubts and cannot test it.

In my case, it was the thermistor that failed.  It wasn't reading correctly and my head was over 100 degrees hotter than it was supposed to be.  Prusa replaced the head and the satin plate that got damaged under warranty.

Since I put a silicone sock on my print head, I have not had one warning.

Publié : 26/07/2024 3:49 am
Allen8355
(@allen8355)
Estimable Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

 

Posted by: @robin_13

 

Posted by: @allen8355

If it happens to return, now you know how to eliminate the problem.  I have no idea why PRUSA, suddenly at their end-of-life for this printer, suddenly felt the need to add this "thermal model" to their firmware, without seemingly fully testing it.  It "seems" they added it just when people were switching to REVO hotends. Maybe to get people to upgrade to a MK4??? I don't know. Just a thought. 

From my experience, this is a safety issue.  Just before this "feature" appeared, I had my head melt.  According to the developers, this wouldn't have happened under the firmware as it would have detected the error.  I have my doubts and cannot test it.

In my case, it was the thermistor that failed.  It wasn't reading correctly and my head was over 100 degrees hotter than it was supposed to be.  Prusa replaced the head and the satin plate that got damaged under warranty.

Since I put a silicone sock on my print head, I have not had one warning.

Sounds pretty scary that until this fix, this printer could be a fire hazard?  That's over 6 years since it was released.  I'm all for safety, but it seems there could have been a bit more testing before it was released, given the large number of people that get this error.

Reminds me of my Audi. For every system on the car there are sensors reporting any errors, if the glovebox isn't closed it has a warning light.  Over the years I've got several warnings of things gone wrong, and in EVERY CASE, the thing that went wrong was the sensor, NOT the actual system it was monitoring. It tries to be perfect by monitoring EVERYTHING, but in the process, it's a very unreliable car due to the MANY false alarms.  

Publié : 26/07/2024 4:31 am
Crab
 Crab
(@crab)
Reputable Member
RE: MK3S Thermal Anomaly on Firmware 3.13.2

The thermal anomaly firmware issue I've read from this forum has kept me from updating my MK3S+ from 3.11. I have lost faith in Prusa to deliver quality firmware, as they've had several releases since 3.11..  and with the incredibly terrible electronic design of their ethernet & wifi system in their latest printers .. it is a shame they've dropped the ball in several areas of engineering. 

Publié : 26/07/2024 6:01 am
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