OK maybe it’s just me but I am having lots of issues .4 nozzles clogging . I have had them clog using PLA and Petg and PA12. I have 4 0f them on my desk all clogged and will have to take them to the shop and heat with a propane torch. So I have used Flashforge machines with very few clogs but not that way now. Is it just these nozzles?
What filaments are you using? Brand and type.
impossibro
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Did they clog in multi- or single-material prints?
If the former, you may have an issue with the min/max temp settings. Do not combine materials with vastly different temps (PLA & PA) and keep nozzle temps between the min temp of the hotter filament and the max temp of the colder temp.
Beware the hard written 250°C nozzle temp in the filament start gcode though. If you see that happening during a filament change, you may need to dive into that code. Or just ensure perfectly dry filament (PLA, PETG combo).
If the single-material, heat creep may be the more likely culprit (keep chamber temp lower and/or check for low flow conditions as well as time-to-clog/chamber-temp-at-clog).
As for unclogging, the semi-auto-cold-pull works quite well on my H2C. At least for PLA and PETG. It may need repetition though.
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I’d also check the filament itself before replacing too many parts. Slightly damp filament caused repeated clogs for me even though everything else looked fine. After drying it properly and doing one cold pull, the hotend started behaving normally again.
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I have seen a lot more blockage with some newer models, so you’re absolutely not alone.4 nozzles as opposed to previous configurations. Repeated jams in various materials certainly sound annoying, however moisture in the filament or printing temperatures may also be a factor.
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Which 0.4 nozzles are you using? Filament brand?
The Bambu HF nozzles seem to have some kind of multi-path geometry inside the flow passage, Bambu Studio gives warnings when using fiber filled filaments that these can suffer from clogs, so clearly they are more prone.
Have you tried using the cold pull utility? It might be interesting to do this a few times after clogs develop to see what is coming outta there.
I will give that a shot thanks
yes itis with a multiprint prints mostly. I did a 10 h print with PLA Pro and it finished up over night. The next morning tried another print same filament but it was clogged.