P1S
Hardened Steel Extruder
0.4mm nozzles in HS and SS
0.6mm nozzle in HS
AMS
Bambu Studio v1.7.7.89 (I use the Bambu Studio slicer)
PETG Basic
EDIT
Looks like this was mostly due to moisture in my filament. I had thought that PETG Basic would survive for a week in my AMS… which is chock full of dessicant… but apparently even a bunch of silica packs are no match for Autumn in coastal British Columbia.
I remembered I had an unopened refill of PETG Basic. I loaded it up (did not dry it as they’re typically pretty good out of the vacuum sealed bag they’re shipped in) and tried the print again. I’ve got two hours to go on a four hour print, but so far I’ve seen none of the issues. I’ll update when the print is complete to confirm.
Edit 2
Confirmed. New spool prints fine.
Hi All!*
I’m suddenly getting tons of stringy detatched fibers of PETG basic where I had been getting nice cohesive walls, especially on long straight overhangs of moderate angle.
More context:
I’m new to printing as of September 25 or so. Since starting with PLA I’ve switched over almost entirely to PETG Basic and had reasonable success with several dozen PETG Basic prints.
Earlier this week I had a massively failed print where a rock-hard snowball of PETG Basic engulfed my nozzle, hotend, and tool face. I ordered a new hotend due to the extent of the damage (this time a 0.4mm hardened steel to compliment the 0.6mm HS nozzle I use for occasional PAHT-CF prints.)
Since that time I’ve been unable to print even moderately-complex PETG Basic prints on any of my nozzles. I get a ton of problems with the PETG sticking to the nozzle and a lot of walls comprised of fibery, unadhered strings. (Not classic ‘stringing’ where unwanted threads are pulled along the nozzle’s path, but areas where the layers do not adhere to each other and create walls made of ‘toothbrush bristles.’)
I’ve tried:
- Purchasing brass brushes and carefully cleaning off the nozzles
- Swapping the nozzle back to the 0.4mm SS version I started with
- Swapping to the new-in-box 0.4mm HS hotend
- Cold Pulls
- Opening up the extruder and removing stray fibers
- I am currently drying out the filament again (weather has been very wet here.)
The odd thing to me is that I had such sustained success with the default settings, and even with everything disassembled, cleaned, and the hotend replaced, those successful settings have become issue-prone.
My current bet is on the humidity issue, but if that doesn’t work I’ll be left scratching my head. (My drying box only goes up to 55C… not to the 65C recommended by the BambuLabs PETG Basic web page. Can I just leave it in there an extra few hours?)
All suggestions welcome.
