Vertical artifact when printing with 0.15 height layers
Hi,
I noticed that when I print with 0.15 structural layers, I get vertical artefacts I don't have (or much less) when selecting 0.2 structural.
Is there a way to improve that ?
The printer is a MK4S kit, the filament is a Prusament PETG Matte black and I'm using the default settings.
left : 0.15, right 0.2
RE: Vertical artifact when printing with 0.15 height layers
The minimum increment on the MK4S is .02mm in Z. When .15mm layer height is selected, you are going to get .14 or .16 actual Z positioning for a layer. Most likely .14 one layer, .16 the next and so on. This is a +-7% variation in Z. .2mm is evenly divisible by .02mm, so each layer is consistently .2mm thick.
Minimum moves are not part of the machine definition in the slicer. I don't think it should allow .15mm height in Z when it doesn't fit the minimum Z move. Using .14 or .16 layer height to match the minimum Z moves would be better. I have turned it in as an enhancement on Github. To add minimum moves to the machine definition and to adjust for minimum moves in XYZ. "Variable layer height" should also account for Z minimum moves.
Your example would be a great addition to explain the need.
There are still many things the machining industry has already learned about movement that needs to be built into the 3D printers.
RE: Vertical artifact when printing with 0.15 height layers
It's surprising. Why does Prusa provide these profiles in te first place if their printer can't achieve this layer height ?
Anyway, I tried to change the value to 0.16. It's better, but not as good as the 0.2 print.