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prusa3d / PrusaSlicer

G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)
https://www.prusa3d.com/prusaslicer/
GNU Affero General Public License v3.0
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Seams on 2.8.0 #12983

Open rinkek opened 3 months ago

rinkek commented 3 months ago

Description of the bug

Every print there are some odd lines at layer start. This seems some kind of pressure advance issue. I don't have this on 2.7.4, which i still have installed on my laptop.

Printed with the -exact- same settings, the two on the left printed with 280, the two on the right printed with 274 and OrcaSlicer.

Afbeelding van WhatsApp op 2024-06-30 om 22 10 51_382e2415

The weird part is, it always happens on the same layers. At first i thought it was my hardware, but is doesn't occur with 274 and OrcaSlicer

Project file & How to reproduce

I just printed this xyz-cube after upgrading to 280, prints fine with 274, same settings.

Checklist of files included above

Version of PrusaSlicer

280

Operating system

Windows 11

Printer model

Voron Trident 250

u89djt commented 3 months ago

(fellow user just passing through) post the project files in 2.8.0 and 2.7.4 so whoever looks at this knows what your various parameters are. I sort of wonder if seams might be part of your issue? Very amateur speculation.

rinkek commented 3 months ago

It was related to Z-HOP and Seams. When turned off z-hop the print was much better. However, with 2.7.4 it completely gone, with 2.8.0 it's still visible, albeit very small. I think 2.8.0 needs some improvement on seams.

neclimdul commented 3 months ago

@rinkek which seam alignment are you using?

rinkek commented 3 months ago

@rinkek which seam alignment are you using?

I'm using aligned, arachne and seam painting on left back corner.

neclimdul commented 3 months ago

ok that's useful. I was seeing similar issues and I thought it might be the changes made to the placement for rear seams which seems to now avoid corners instead of preferring them. But if you're painting the changes to alignment wouldn't matter.

Talking in the discord, some said the placement was changed as well as "hierarchy of printer moves involving layers and seams" and it sounds like that's a more likely candidate for the cause now.