Weird ripple effect on otherwise flawless PETG-CF print
Hi guys, I seem to have some oddities with my CF PETG. There is a weird rippling effect at certain parts of the print I cant really pin down. Any suggestions onto what might cause it will be welcome!
Printer: upgraded AWD vcore3 400
Ratrig toolhead with custom setup for peopoly Lancer extruder and meltzone
Print parameters:
0.2 layer height 0.6 layer width
3 walls 20% infill arachne
Outer wall: 150mm/s 3K accel
Inner wall: 250mm/s 10K accel
Infill: 500mm/s 20K accel
Peopoly CF PETG 230°C
5 Replies
I get that with normal petg sometimes, it may need dried. That's been the silver bullet for most of my petg issues. But I'll be following this thread to see what others suggest!
This I usually get, if printing too fast. The filament basically gets ripped with the nozzle as well. Try lowering your speeds.
That's the reason the newer HighFlow or HyperSpeed PETGs are so popular. PETG needs some time during printing...
I dont understand that tho, because the outer walls are significantly slower than infill and that prints without any issues 👀
Peopoly petg-cf is HF. Its designed for their printer which is insanely fast. If using Orcaslicer- create a new printer config mirroring the one you were already using. Call this one by the same name but put petg at the end of the name. In this new printer config open its config window and change the z offset to 0.03. Do not let this filament squish each layer like pla. Reduce speeds to what is shown in the pictures. DRY DRY DRY your filament. It looks very wet. CF based filaments absorb 2-3 times more moisture than their standard counterparts in my experience. If your part looks fuzzy, swollen or leaves wisps on infill and edges then it is wet. Dry at 65c (not in a polydryer as these do not reach over 55c) for 6-8 hrs. You may need to dry it again halfway through the spool too. Increase print temp. 230 seems low but I havent used the peopoly version. Do not use rect/grid infill. Use gyroid. Do NOT use infill combination.
This is what i get with all these settings. (The bridge speed should be 20 not 75 fyi that was an error)
