Problem when trying to hide the seam
I want to hide the seam. When I set "Scarf joint placement" to Contour the chamfer at the seam gets ugly. What slicer settings do I need to use to fix this?
I've printed over 30 tests with every combination of slicer settings I could think of.
Prusa MK4S - firmware 6.2.6
PrusaSlicer 2.9.2
FreeCad 1.0.2
0.25mm Structural and 0.05mm Structural same result PETG
I've tried exporting from FreeCad as a .3mf and a .stl. same result
The test part is very simple. 50mm Dia with a 3mm wall thickness. It's 15mm tall with a 45° chamfer at the top.
RE:
Honestly, it looks like you have other issues beyond the seam. That said, I find scarf joints amazingly nice looking and nearly imperceptible. If one of those parts in the last image has scarfed joints, you've really messed up the settings. You might want to zip your Slicer .3mf save, and post it here. It allows folk who want to help to see precisely what you've done.
RE: Problem when trying to hide the seam
I made some progress, but I have to retract some of what I said and agree: the scarfs on the Nextruder profiles are horrible. I need to take a couple photos and will post my results a bit later.
RE: Problem when trying to hide the seam
The prints are
0.2 Speed (worst)
0.2 Struct (bad)
0.2 95% filament ratio
0.2 95% filament ratio with 4 perimeters (solid infill)
0.2 Quality on my Mk3 (best)
RE: Problem when trying to hide the seam
I'm thinking even less for the filament ratio would help improve things ... not sure why the PETG is over-extruding on this part, but it is certainly doing that on the scarf.
I'm also seeing some linear advance issues ... but they are minor compared to the scarf over fill.
Maybe set your filament flow multiplier to 93% and see what that gets you. It'll be a tradeoff to infill closure and seam quality.
The more I play with my new Core One the more it feels like it's a work in progress. You'd think Prusa would have the Nextruder profiles dialed in by now. I have some calibration tools on the way, if any of the tweaks to cals improve this scarf issue, I'll post an update.
RE: Problem when trying to hide the seam
Thanks a lot for all of your effort. At lease you have verified I’m not crazy.
RE:
@tom-johnson-2
your not crazy, you simply need to learn how your printer responds to the settings it can react too. I also have Mk3 series printers and can adjust my printers to work with settings prior to scarf joints and also with scarf joints to work in exactly the same way as per-scarf-joints to look identically livable as them in the new Fad based scarf-joints on my MK3 printers, it is most likely that the newer versions of the software related to the newer printers is causing a problem. If you where or are seeing a failure with these older versions it might make this easier to see. Other than that you will simply have to take the time to learn and see if the newer versions will allow you this control. They may not. I know this seams counter intuitive, but the companies goal is to make as much money as they can form you, discrediting/removing older more effective ways is part of this. You will also see this in slicers such as Bambo and Orca as you move forward, if its possible for you to move towards backwards compatibility, relative to Prursaslicer I would recommend this. The company has changed, and is not the community based company they used to be.
Regards