Over-extrusion Top-Layer or other Artefact?
When I print with my new MK4S MMU3 combi, I get this wierd over-extrusion or other artefact on top layers. Strange, that not all top layer is affected. One side its clearly visible, the other side is beginning to show signs of over-extrusion. All arround the part in the last 3-5 layers a lip has formed, that could also show a sign of over-extrusion?!
Does someone have an idea, what my problem could be?
Thank you.
From below, Lip is visible:
From the side, Lip is visible:
Gradient on the surface, middle seems to be unaffected
Closeup on the failing area:
overview:
You have some warping. Clean your print sheet, dishwashing detergent (Dawn/Fairy) and plenty of HOT water. Make sure you are not printing in a draft.
Cheero,
RE: Over-extrusion Top-Layer or other Artefact?
Thanks for the quick response, Diem.
I cleaned the bed as described and put the printer in an enclosure. Same model, same problem.
I have an old Ultimaker 3 where I had to apply glue for better adhesion.
My Anycubic Kobra 2 Pro at home has a rough PEI build plate. I never had to worry about any bed adhesion with it.
Now after my first prints with the MK4S i have not one successful print. A Brim might help, but from now on printing only with Brim is a pain.
Are there other solutions, I could try?
RE: Over-extrusion Top-Layer or other Artefact?
Some improvement but not enough - please show us the underside of that last print.
Cheerio.
RE: Over-extrusion Top-Layer or other Artefact?
RE: Over-extrusion Top-Layer or other Artefact?
I just printed a simple first layer bed level test. Bed is level, but the Z offset seems to be to low. can't find the settings to change it tho.
If the first layer of a print counts that much, does it affect my problem as well? 
RE: Over-extrusion Top-Layer or other Artefact?
A different file for bed level test in gray shows my untrained eye, that the nozzle is a bit to low. The underside shows trapped air pockets between the lines. I can feel these pockets with my fingernail.
