Over-extrusion only on small perimeters
-
Maybe someone with more experience can help me tune my setup to get rid of this small issue.
I have tuned my extrusion rate and I get really nice accurate parts with perfect infill and top surfaces. Measured wall thicknesses, 100% layers look solid and without over-extrusion whatsoever. I am printing with a E3D V6 fitted with a 0.3mm airbrush nozzle so even a small error in the extrusion rate is visible.
Also, my retract settings are also tuned in, so that I have perfect quality on prints (no blobs, no holes).
The problem is when it gets to small island or perimeters (2-4mm²) than it goes crazy into the over-extrusion and I have to reduce manually from the Duet Web Client from 100% to almost 65-70% to get a correct extrusion without blobs and monsters. A perfect test STL would be the hollow calibration pyramid from Thingi…A little about the setup:
-Bowden system around 60 cm long (I still have to measure it)
-1.75 filament- E3D V6 with airbrush nozzle
- Pressure advance in firmware 0.25
- S3D with following retraction settings:
- retract 7.5mm
- extra restart 0.15mm
- vertical lift 0.15mm
- retraction speed 90mm/s
- coast at end 0.7mm
no wipe
Retraction between layers active
Only retract when crossing open spaces
Does anybody have an idea where and what I could tune (slicer or duet firmware) to get an even extrusion regardless of perimeter size ?
Thanks in advance!
P.S. I have to say.. wow.. this forum grew up so fast! almost 1600 users and 4000 Threads in such a short time!
-
Try setting extra restart and coast to end to zero. With pressure advance in use, you shouldn't need them.
