PETG ribbed wall
Having a weird issue with rib like artifacts showing up on the outer walls when printing with petg, I believe it is a slicer setting because I do not have the same issue with PLA
Solution:Jump to solution
@CrashTestCharlie / VC4 400h So my flow was dialed in already, the culprit seems to be somewhere in the retraction settings. I disabled retract on layer change and then helped quite a bit. Going to play around with retraction speed and deretraction speed
8 Replies
Over extrusion. PETG is like springy goo, and when pressure bulid up it over extrudes until equalized. Try dropping your flow rate in 5% increments and see what happens.
☝️ Yeah, it sounds stupid, but I had this and was chasing something else and when I got my flow right this cleared up. So it's worth a try
okay will do! Flow is already down to 93% but over extrusion does make sense, the top layers are not coming out as smooth as they could
The best test I found was to make a one layer stl with holes in it, if it's all one part then the problem is masked. Do like a 100x200mm sheet, first layer thickness, then put some square and circle cutouts to break up the lines. You'll see globbing where the pattern comes back around to join up. Turn it down until it doesn't.
do you happen to have an stl of that?
it wont let me upload it, I'll make a 3mf
Solution
@CrashTestCharlie / VC4 400h So my flow was dialed in already, the culprit seems to be somewhere in the retraction settings. I disabled retract on layer change and then helped quite a bit. Going to play around with retraction speed and deretraction speed
That's a good next step. I think default is 60mm/s, one filiament I have rec's 50.
One thing I noticed was how much ooze I got at the end of a print. The 1.25mm I have isn't enough to stop that. so it's still probably too much during a print.