Jam when printing ASA in heated enclosure
Hello everybody,
I'm trying to print an 8 hour print in ASA. I have managed to print it twice with those spec :
- Prusament black ASA (with stock prusaslicer profile - mk3s)
- Heated enclosure at 40 degres (PSU is outside)
Due to an error in the model i need to print it again, that's where things go wrong.
During the third print i got a jam after 5 hour. Extruder had grinded the filament and nothing was coming out of the nozzle.
I got it working again with multiple cold pull and a guitar string through the nozzle. After that the print goes on for a random period of time and jam again (usually after around 30 min).
Setting the nozzle temp to 280 and pushing some filament appears to clear the jam but next print it jam again. I tried lowering the enclosure temp to 30 but without any success.
As a side note when i first received my printer i could not print anything there was always jam. I solved this by disassembling the hotend, reapplying thermal paste and changed the noctua fan by a sunon fan. I'm thinking of reapplying some new thermal paste but i'd like some advice before disassembling the hotend.
Thanks !
RE: Jam when printing ASA in heated enclosure
I don’t think it is the enclosure. Post a picture of a cold pull.
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Chuck H
3D Printer Review Blog
RE: Jam when printing ASA in heated enclosure
There you go, from top to bottom, oldest to newest.(prusament grey pla)
RE: Jam when printing ASA in heated enclosure
Here's two more cold pull this morning after yesterday evening jam (right one is the last)
RE: Jam when printing ASA in heated enclosure
Yours is slightly different form mine, but I think you nozzle is not against the heat break. That gap is the widening of molten material that is causing the jam.
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Chuck H
3D Printer Review Blog
RE: Jam when printing ASA in heated enclosure
Ok, i was going to remove the nozzle to clean thoroughly so i will check that. Out of curiosity what's pointing you in that direction ?
I would be surprised to have a gap, because as mentioned in that page https://www.help.prusa3d.com/en/article/changing-or-replacing-the-nozzle-mk2-5s-mk3s-mk3s_2069 i have a gap between the nozzle and the heater block.
RE: Jam when printing ASA in heated enclosure
You were right, there was a gap between the nozzle and heatbreak, thanks !
I really would like to know how you spotted this just with pictures of a cold pull !
Anyway, thanks !
RE: Jam when printing ASA in heated enclosure
@benoit-3
I would not have known if I had not done this myself. Glad it helped you.
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Chuck H
3D Printer Review Blog
RE: Jam when printing ASA in heated enclosure
I gave up on ASA after repeatedly cleaning the nozzle and trying again.
I found this thread and tried again - after clog, I replaced the heaterblock and hotend tube and made sure I had no gaps. Still got a clog! I printed the same part with ABS before and after the ASA fail and was successful with both. I'm using a 0.4 steel nozzle. Does that matter?
There's another similar post here https://forum.prusa3d.com/forum/original-prusa-i3-mmu2s-mmu2-how-do-i-print-this-printing-help/asa-prusament-clogs/#post-644837