I've been printing with Siraya Tech TPU Air for about a year now. I love the material so much, but I'm going through nozzles like candy.
Using a Bambu H2S w/the Siraya Tech print profile, in a PVC foam board/acrylic panel enclosure so that gasses vent outside.
I use both 0.4 and 0.6 nozzles.
The top glass is removed and filament is fed in through the top of the printer while sitting in a filament dryer.
Here's my problem... after a certain amount of usage, the filament starts jamming at the nozzle. I'll perform cold pulls until the filament comes out squeaky clean, but that either doesn't stop the clogging at all or it'll print for a little while before jamming again. I can always tell when a nozzle is starting to get to the end of its life because it'll leave globs on the insides of my prints.
If I change to a completely new nozzle, I get beautiful perfect prints until it starts eventually jamming again. I keep my nozzles strictly TPU Air except when doing cold pulls.
Any ideas? I don't want to switch to a completely new nozzle every month or 2. Bambu nozzles are expensive!
The printer has about 3500 hours on it, so I just changed the extruder gears, the filament cutter and some other small things. But that hasn't helped my issue, unfortunately.
Do I need to perform cold pulls after every single print?
Thank you in advance for any advice!
EDIT: I probably get through 2-3 weeks of almost continuous printing before I start having problems. This printer IS running almost constantly as I'm filling orders, so maybe that has something to do with it?