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.
But why does it print ok for 3/4 part...?
I have no clue what is going wrong........
Someone?
TnX in Advance!
Joost
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
RE: Overheating
Sounds challenging.
Not an easy answer I am afraid.
Will let you know the result...........
TnX
RE: Overheating
These are the values I found:
Extruder Thermistor: 135.1
Extruder Heater: 15.1-15.2
Heatbed Thermistor: 129.1
RE: Overheating
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!
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.
RE:
I just ran a PID Calibration and a selftest. Both went OK.
Maybe I should try a new print again.....?
RE: Overheating
Benchy went well.
Defaults: 0.15 speed, Prusament PETG, Mk3s+
All printed in Enclosure
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.
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.
RE:
Your enclosure is seriously bad ass Props to that Makes me want to rethink mine.
Benchy went well.
Defaults: 0.15 speed, Prusament PETG, Mk3s+
All printed in Enclosure
Don’t trust forum advice.
RE: Overheating
Your enclosure is seriously bad ass
+1 - Is that scratch built or per plans or a kit?
Cheers
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
RE: Overheating
It looks like the ones Ratrig sells
Having problems with bed adhesion every morning...
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". 🙂