Nozzle clogs during filament change
Hey folks 👋 I recently swapped my 0.4 nozzle to 0.6 volcano my rapido UHF hot end. Ever since I’ve had occasional issues during filament change; maybe 1 in 3 ends up with a clog in the nozzle. The filament unloads but I can’t feed the new filament through. Using a needle through the nozzle doesn’t unclog it I have to drop the hotend and use a needle in the top, I usually get a ball of filament out on the end of the needle then I’m all good, but doing this mid print is no fun!
The only difference I’ve noticed is when I unload the old filament it comes out fairly clean, so no blob on the end. I’m fairly sure when I get a clean change with no clog the old filament comes out with a small glob on the end.
Any ideas? I unload using the RatOS macro at printing temp (so 250 for my PETG). Thanks 🙏
6 Replies
fascinating-indigo•2y ago
Try higher temps for sure. Try again temp tower and see if it sort the problems
I find that need it to change to 275 for pctg after printing with volcano nozzle. Still figuring out 0.6 volcano retraction settings but on 0.4 it just print fine. On 250 temps ( i used before on ender) i find it is cloging mid print and not extruding at all.
I’ll give that a go, I’ve not had a clog mid print yet though just during changes. I’ll maybe try a change at a higher temp first as I’m happy with the printing as it is
I personally don't use the filament change macro. When I change rolls I heat my hotend up to working temp, release the extruder (on my orbiter 2, I just pull the level so there's no pressure on the filament), then manually feed some filament through the hotend. After a small amount has been extruded I pull as quickly as I can back out of the extruder. Then I feed in the new filament roll
I’ll give it a try doing it manually but that seems to be the same process the macro uses 👍
It is the same process, but I find I do it faster than the macro and it works better
Can you send config for 0.6 nozzle?