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Nozzle keeps clogging... Need help  

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Mike Tv
(@mike-tv)
Active Member
Nozzle keeps clogging... Need help

Nozzle keeps clogging... Need help

Hello everyone,

I really need your help now.

I'm not a pro, but I'm not a beginner either...

The nozzle keeps clogging again and again; right from the start, the extruder has had problems (clicking noises).

However, it usually manages to push the filament through, but then about 20-200mm of filament is missing.

Troubleshooting steps taken:

Cleaned the nozzle with a needle, changed the filament (from PLA to new PLA) --> no success.

Cleaned the nozzle and switched to PETG (higher temperature) --> no success.

Replaced the nozzle, changed from Obsidian to standard (0.4mm), increased the pressure at the extruder via screws --> no success.

Tried brand new PLA at 230 - 237 degrees --> no success.

According to the display, I have no temperature drops or anything like that.

Do you have any idea what else I can try?

Best regards,

Mike

Posted : 14/01/2025 11:42 am
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Nozzle keeps clogging... Need help

I have had this problem twice. First time I had a standard mk3s, and it was winter time. I had the solid fuel fire going. And the room temperature became too high. Which meant the left hand (hot end heatsink)fan could not cool down enough. Leading to heat creep. Reducing room temperature  solved that. The second time was after I changed the fan for another  manufacturers fan. And it was not turning fast enough. 

There is a hidden experimental menu in MK3 firmware which allows you to improve fan cooling. These issues may help you localise the cause. 

Regards Joan 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 14/01/2025 12:50 pm
Mike Tv
(@mike-tv)
Active Member
Topic starter answered:
RE: Nozzle keeps clogging... Need help

Thank you very much for the response.

It's definitely not too warm, but it could be too cold.

The idea about the room temperature could be relevant.

Right now, I have 12-14 degrees in the basement.

Posted : 14/01/2025 2:00 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Nozzle keeps clogging... Need help

I have printed with a mk3.9 and MMU3. in a garden shed in winter...
initial heating was augmented with a heatgun, to overcome mintemp...  PLA prints and PETG prints and a couple of simple multi material  PETG with PLA for Support Interface only 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 14/01/2025 10:40 pm
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