Filament setting in the Core One?
I have been working on dialing in setting for different filaments. Some are Prusament and some are other brands. I'm curious why the Prusa Core One settings in the Prusa slicer do not follow the recommended setting on the website. I get that the CoreOne is a great machine and out performs the run of the mill settings but I have found that some setting are way to high. The PETG setting is way off and I have had issues with printing even the Prusament PETG. From all my research the VMS is way to high and once I turned it down to 15 from 24, the results are 10x better. For reference, most PETG manufacturers recommend an 8 VMS including Prusa.
Im guessing it has to do with the HF nozzles but still 24 seams way to high.
Also, the heat bed setting is too high as well and cause fusing to the bed. I ended up damaging a brand new bed removing the PETG. It stuck so hard to one spot that it pulled the coating off the PEI plate. Since then I have added Elmers Glue stick and the prints pop right off now.
Does anyone have any insight?
RE: Filament setting in the Core One?
Because there are too many variables which is why settings come in ranges. As for volumetric flow it depends so many factors: print speed, extrusion width, layer height, type of filament, color of filament, temperature of nozzle, material the nozzle is made out of (brass, steel, diamond). As for the temperature of the print bed, that depends on the type of bed material, the texture, whether or not you use an adhesive and also what chamber temperature you need to reach.
So the short answer is any built-in profile or manufacturers recommend is just a starting point. If you want to most accurate prints then you need to determine these values experimentally by running tests. Not just guessing. For simple prints, usually the built in profiles are good enough.
I would suggest installing OrcaSlicer and running the built in calibration tests. Start with a temperature tower, next do an extrusion multiplier test, pressure advance, shrinkage and finally max volumetric flow.
RE: Filament setting in the Core One?
IMO, the PEI sheet is a bad choice for PETG, though it will work with glue or such. The satin or texture sheets are great for PETG, at least for my small prints. Some people have had trouble with lifting corners with large prints.