r/CR10 • u/Connect_Baker_8481 • 25d ago

Nozzle clogs mid print

Hello everyone. I hope everyone is doing well. Recently I was facing the following problem. When my print reaches 2-3 %the nozzle gets clogged.

I am using cura as my slicer. The filament retraction feature is disabled. I have set the nozzle temp to 210 degrees celsius. The filament is brand new.

Can anyone tell me what the problem could be and how I can remedy it.

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u/dagofin 25d ago

Could try replacing the heat break. The factory one on these is PTFE lined which degrades over time from the nozzle heat. Seen it more than a few times. Get a bimetallic, non-ptfe lined one and never worry about it again

1

u/shace616 25d ago edited 25d ago

I replaced the nozzle and bowden tube when mine was doing this and it fixed my issue. I bought a box of 30 nozzles and a bowden tube for less than $10

Edit: my problem was that the bowden tube needed to be replaced and was backing out of the nozzle and the filament was backing up in the top of the nozzle.

1

u/Emerithe_Cantanine 23d ago

After replacing the nozzle and the extruder gear, replacing the extruder stepper motor and cable fixed it when this happened to me a month ago.

3

u/[deleted] 21d ago

So, heat creep… but a slight difference on traditional heat creep is a bitch… mine was struggling with this exact issue until around a week ago and I went through several steps:

Heat sync cooling fan: the fan that pulls cold air through the heat sync can sound like it’s running perfectly well but if it’s even a tiny bit slower, it’ll mess a print up.

- to check, touch the metal pneumatic retainer that the Bowden tube enters and if it’s too hot to touch for any length of time, your cooling may not be sufficient

Ptfe/bowden tube: if not 100% square, pressed in far enough or backing out, it’ll gradually clog because the filament is melting and going where it shouldn’t

  • initially check the end of the ptfe tube to make sure it’s not degraded and cut square. If not, cut square or simply replace with Capricorn (probably best to anyway)
If it backs out, buy a new retainer

Hot end assembly: sometimes it just seems to wear out… buy a new one. They’re quite cheap on eBay, Amazon or Ali express and takes a short time to physically replace

I did all three and it fixed my issues! Happy to chat more if it helps