What is this?! Wet filament? Clogged or fried nozzle? Prusa PC-CF which usually works awesome.
Filament was recently dried (but not quite to optimal temperature but several times as long). Bottom - New part had some infill/perimeter issues.... otherwise looks ok. Middle - ran an extrusion multiplier test... tweaked a small amount but was general okay and adjusted test looked improved. Top - Reprinted part - first few layers looked fair but then it started spewing crazy fuzz. One note is the first few layers are a chamfer and the ugly portion is straight wall.... also note infill looks ok.
31 Replies
optimistic-gold•14mo ago
Different view of same parts.... better lighting.
optimistic-gold•14mo ago
I just unloaded filament to run a test with a known working setup with a different filament and his popped up....
Infill overlap in mm instead of % due to a missed %sign?
optimistic-gold•14mo ago
nope
Tried a few different % 18-50%
Printing too hot? Lower layers not affected because they take more time and cool passively
What's your line width? Some of the lines look barely attached
optimistic-gold•14mo ago
0.6mm with a 0.6mm nozzle
I prefer a bit thicker, 0.7. but also check that you have your nozzle correct in slicer and klipper
optimistic-gold•14mo ago
yup re: klipper
Which filament is this?
optimistic-gold•14mo ago
Prusa PC-CF
....which has worked awesome in the past.
GitHub
superslicer-config/0.16mm layers 0.6 nozzle HQ.ini at master · elco...
my personal superslicer settings. Contribute to elcojacobs/superslicer-config development by creating an account on GitHub.
optimistic-gold•14mo ago
thanks
This is my 0.6 profile
optimistic-gold•14mo ago
Just finished a print... of a known working setup - different material, same g-code file, etc. It's a part I've printed dozens of.
optimistic-gold•14mo ago
Right side is the one just now.... transparent isn't too visible but my fingernail says there is a similar infill/perimeter gap - left one is continuous/smooth.
Yeah right looks under extruded
optimistic-gold•14mo ago
Suspecting a clog or extruder issue.... sigh.
Yeah. I had something similar to your blobby pattern when I thought I had a 0.4 on the printer but it was actually a 0.5 or 0.6
What kind of nozzle is it?
optimistic-gold•14mo ago
Right side is the recent one..... beyond the first few layers, it is not looking bad.... a few zits but nothing major..... hmm.
optimistic-gold•14mo ago
MicroSwiss hardened steel
Back in a bit.
Update.... tried many things. a) Increased width in slicer b) Did hotend/nozzle unclog procedures.... ran a 1.75mm rod all the way through.... needle in nozzle tip, torch, etc. c) Ran pressure advance calibration thing - long shot and side benefit of ruling out slicer goof-up.... d) undid nozzle_diameter = 0.6 in klipper e) reran input_shaper
I did my best to change only one item at a time.... no appreciable difference.
In fact, I just reran the extrusion widget and the gaps are worse than before.
optimistic-gold•14mo ago
optimistic-gold•14mo ago
🤯
(same g-code file)
Same spool of filament.
Also tried drying the hell out of that spool.
Opened up the extruder.... nothing noteworthy.
I did not try swapping nozzle.... guess I'll try that now,.
Extruder dying?
@elcoj 👋
Swapped the 0.6mm nozzle to 0.4mm.... same thing, just skinnier lines. Not slicer related as I am using the pressure advance pattern thing to create the g-code.
Running out of things to try.... think I am going to start a new thread in fix-my-printer as this is outside the scope of a single print.
is your temperature high enough?
it is indeed very underextruded
optimistic-gold•14mo ago
Hmm, I had considered that and I did rerun the PID tune on the extruder.
I'm running at 285 and have not varied.... it's worth a shot... only thing is that is already 5C over the max rated of my Rapido.
I'll try futzing with the temperature of the PETG.
285 for PETG?
optimistic-gold•14mo ago
No, for the PC-CF
What I meant is I'll try futzing with the PETG instead of the PC-CF as I can't go higher in temperature.
Could anything cause temperature readings to wear & use?
optimistic-gold•14mo ago
Well.... dang it! I guess that little crash last week wasn't so minor.
optimistic-gold•14mo ago
Wish it was more broken..... would've been quicker to diagnose. 🤦♂️
@elcoj Thank you again for your attempts to troubleshoot.
A seam is normal, but you could also have a crack, I have had that.
The top would get got, but the bottom would not
So you wouldn't see it with the sensor
A symptom can be that extruding a small bit works because it already melts in the top
optimistic-gold•14mo ago
Looking at a new-in-box unit.... indeed, it is a seam. 🤔
Another issue is the broken screw head just above that line.
You might have damages the throat too then