Overheating  

RE: Overheating

Use this guide to test thermistor and heater 

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

Might be bad thermistor or heater

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

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.

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

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

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.

RE: Overheating

It looks like the ones Ratrig sells

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". 🙂