OVERTURE LW-PLA issues after seam.
Hi there. I am really struggling with this filament. I seem to struggle to extrude after retraction. But it's not all the time. I've attached a few photos which I hope lets you see the issue.
I'm trying to print the GasbONE rc plane from thingiverse. Outerwalls are 0.4mm with infill at 0.5mm.
Ratrig Vcore 3.1
Phaetus Rapido UHF
Bondtech 0.4 CHT
Settings:
ORCA Slicer
Acceleration capped at 5000
Speed capped at 60mm/s
Wall thickness 0.4. 1 Wall
Bottom/Top layer 3 layers
Retraction 1mm with 40mm/s retract and deretract speed (any faster and it strips the filament)
Z Hop is on
215c hot end temp. Hotter creates a lot of massive blobs.
Things I have tried
Recalibrating flow. My value is 0.98.
Recalibrating PA. My new value is 0.030 for this PLA, 0.042 for normal PLA
Retraction setup, I get very little stringing at 0.8mm, no stringing at 1mm.
Increasing flow from 0.98 to 1.2 (lines are thicker but still, struggles to flow after retract)
Printing slower with slower acceleration. Even at 1000 acceleration and 30mm/s speed, I still get the problem
Purchased a brand new nozzle, fitted new ptfe tube between my orbiter2.0 and rapido hotend
Printing as low as 205c creates bad layer adhesion
Printing above 215 creates random blobs which end up breaking the print when the nozzle hits it
Reducing my cooling fans from 15% speed (4028 delta fan) to 5%. Doesn't do much on the longer layer times, noticable difference on smaller details
Turning of cooling fans (creates bad corners on small detail)
The problem is so inconsistent. It doesn't happen at every retraction as you can see. I set my seams to be at the same corner. If I set my seams to be random, I get randon under extruded lines on the walls etc. The print it self has to be 1 wall. If I print an object with 2 walls, I don't get this on the outer walls, only the inner.
Any help would be appreciated. I'm pulling my hair out over this!
Thanks.
5 Replies
I also have issue with no extrusion after layer change
After lots of experementing I am starting to think it might be the slicer. Please let me know if you figure it out and i will do the same.
I have tried superslicer, prusa slicer, orca and cura. All have exactly the same issue. Removing wipe on retracts helps ALOT however, I thought I had it figured but I still go the issue right at the end of my print...
As you can see, seams are great to start with. After various tests i thought I had cured it so I decided to print a proper part. Started of great! Then turned out bad at the end....
Had complete failures today. Couldn't complete any print, not even a simple 1 walled cube. Filament kept clogging. Went back to a normal 0.4 nozzle, fitted a new tube between extruder and hotend that has a larger internal diameter... same issue. Cut some filament off and decided to run it through some PTFE tubing. Very VERY tight. Measured the filament in places. Mostly 1.75 but occasionally I would read around 1.8 and 1.9. Seems my retraction issue is to do with the filament being to tight to pull into the extruder. I'm currently hanging the filament above the printer, direct into the extruder without any ptfe tubing to guide it. Seems to be okay so far. So far I'm not happy with this filament... I was pulling my hair out, blaming the printer and slicers.
Just an update. Purchased another roll. Seems to print a lot better. Max speed is 60mm/s with a 0.4mm nozzle. 210c, retraction setting 1.5 minimum. If you get stringing, increase retraction but slow down your acceleration. I usually run 12k acceleration outer walls but that's down to 3k just for this filament. The filament is not the best to work with. If you set klipper to extrude 50mm at 10mm/s, you will see a half second delay before anything comes out. No other filament does that with me.