Upgraded my MK4S to Core One and getting waves in the first layer on a large print
I don't know what are causing these "waves" in the center of the print. I didn't get this with MK4S. I've made sure the idle tension screws have the correct tightness, checked the belts. The head is too close to the bed? Maybe I need to dry the filament? Or a problem with the leveling mesh? Another issue I have is when I change the filament mid print, there is about 2cm of filament extruded from the head after the filament purge that gets onto the print surface.
- Core ONE assembled from MK4S
- 0.4mm Obsidian HF nozzle
- Prusa Satin Sheet for Core ONE
- Overture PETG
- Belts tuned to 85hz
- 0.20mm Structural
- default settings for above
RE: Upgraded my MK4S to Core One and getting waves in the first layer on a large print
That looks like the first layer is not sticking well.
Clean your print sheet - a good anti-grease dish soap (Dawn and Fairy are usually recommended here) and HOT water.
RE:
It's a brand new sheet from Prusa and I've only done 2 prints on it. I've been cleaning only when it's cold with 90% isopropyl alcohol. I looked at the sheet and I can see parts of the coating seem to be melting and there are marks in it. Maybe the sheet is defective? I've been using the same alcohol on an older satin sheet (had it for a year) and never had this issue before where I see rings on the sheet. If you look at the first photo at the bottom to the left of "PRUSA CORE ONE" you can see what I mean. That could explain why I can't get a decent first layer.