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JdL
 JdL
(@jdl)
Eminent Member
Overheating

Dear Prusa users,

I recently upgraded my MK3S to MK3S+. Plus completely new Extruder with 0.4 nozzle.
Factory reset, Firmware Update 3.11 , Tests done, Calibration wizard, etc. and printing with default preloads (0.15 speed, Prusament PETG, Original Prusa MK3S+) from PrusaSlicer 2.5.0 (via Octoprint).
But the print sort of burns/overheats.

Print Prusament_PETG

But why does it print ok for 3/4 part...?
I have no clue what is going wrong........

Someone?
TnX in Advance!
Joost

Posted : 10/01/2023 6:08 pm
Hello
(@hello)
Noble Member
RE: Overheating

Use this guide to test thermistor and heater 

https://help.prusa3d.com/article/multimeter-usage_2117

Might be bad thermistor or heater

Please help me out by downloading a model it's free and easy but really helps me out https://www.printables.com/@Hello_474427/models

Posted : 10/01/2023 7:14 pm
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE: Overheating

Sounds challenging.
Not an easy answer I am afraid.
Will let you know the result...........
TnX

Posted : 11/01/2023 10:13 am
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE: Overheating

These are the values I found:

Extruder Thermistor: 135.1
Extruder Heater: 15.1-15.2
Heatbed Thermistor: 129.1

Posted : 11/01/2023 12:49 pm
Robin
(@robin)
Noble Member
RE: Overheating

 

Posted by: @jdl

These are the values I found:

Extruder Thermistor: 135.1
Extruder Heater: 15.1-15.2
Heatbed Thermistor: 129.1

So those are fine.

Other possible causes for the burned look:

1) settings, did you change anything? I know you wrote you used defaults, which is good, but perhaps you changed something accidentally  -> post the zipped project file

2) extruder leaking, the burned material might leak from the top of the heat block and rund down and accumulate on the nozzle -> take a picture of your hot end and post that.

If at first you don't succeed, skydiving is not for you.
Find out why this is pinned in the general section!

Posted : 11/01/2023 2:17 pm
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE: Overheating

Before the upgrade it worked pretty ok, but had some oozing of material before printing and therefore hoped the upgrade to "+" might help.
Never had these burning symptoms before.
Using the same default settings as before.
I just realised I didn't do the PID calibration. Never did BTW.

picture included.

Posted : 11/01/2023 2:38 pm
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE:

I just ran a PID Calibration and a selftest. Both went OK.

Maybe I should try a new print again.....?

This post was modified 2 years ago by JdL
Posted : 11/01/2023 6:26 pm
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE: Overheating

Benchy went well.
Defaults: 0.15 speed, Prusament PETG, Mk3s+

All printed in Enclosure

Posted : 12/01/2023 1:59 pm
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE: Overheating

Problem seems solved. Prints are ok now.
Don't ask me what the cause was.
I disconnected and reconnected the the Thermistors to measure the resistance. So, maybe the connection wasn't perfect before...?
I have done the PID-Calibration, which makes sense after renewing the Extruder/Hotend combo together with the MK3S+ upgrade.
Maybe that was the problem....?

Anyway...I can print again.
TnX for the help.

Posted : 14/01/2023 7:08 am
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Overheating

If you upgrade to FW 3.12, please note the following: https://github.com/prusa3d/Prusa-Firmware/releases/tag/v3.12.0 (New thermal model protection)!

wbr,

Karl

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.

Posted : 14/01/2023 8:40 am
Eric E
(@eric-e)
Member
RE:

Your enclosure is seriously bad ass   Props to that   Makes me want to rethink mine.

Posted by: @jdl

Benchy went well.
Defaults: 0.15 speed, Prusament PETG, Mk3s+

 

All printed in Enclosure

 

Don’t trust forum advice.

Posted : 14/01/2023 12:30 pm
RandyM9
(@randym9)
Honorable Member
RE: Overheating

Your enclosure is seriously bad ass 

+1 - Is that scratch built or per plans or a kit?

Cheers

Posted : 15/01/2023 4:52 am
Extra Fox
(@extra-fox)
Reputable Member
RE: Overheating

That could well be his own design, but JKTech sells plans for something similar.

https://www.jktech.si/en/store/DIY-Smart-3D-Printer-Enclosure-NEW-2023-p508887921

I very nearly built one as I have all the electronics to do so, even his control board, but I went a different direction.

Aaron

Posted : 15/01/2023 5:53 am
Yveske
(@yveske)
Estimable Member
RE: Overheating

It looks like the ones Ratrig sells

Having problems with bed adhesion every morning...

Posted : 15/01/2023 7:08 am
JdL
 JdL
(@jdl)
Eminent Member
Topic starter answered:
RE:

TnX for the compliments.
It is my own design and build based on Alu-3030 profiles with Polycarbonate sheets (4-5mm).
Using a Zhiyu FAN-1248 controller with a 120mm fan to control temperature inside the printer part of the enclosure.
And Raspberry Pi with Octoprint connected with printer and via WiFi with PC (Blender+PrusaSlcr).
Spool/Filament part of the enclosure is more or less sealed to keep humidity within reason.
I am very pleased with the setup.

My printer is placed in my attic where temperatures fluctuate between 10-30C.
I decided to build an enclosure when I found out that some filaments print bad at low temps.
At the moment I am working on a cooling part based on Peltier elements and heatsinks with fans.
Also a Blazecut T050E is waiting here to be applied inside the unit to protect against fire (the mentioned overheating was an eye-opener).

Hope this helps.
BTW: I am dutch. So, my english is not "mother tongue". 🙂 

This post was modified 2 years ago by JdL
Posted : 15/01/2023 10:02 am
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