Problem printing at 0.1mm layer height
I have been successfully printing for a few weeks now with Prusa PLA, Polymaker PLA , and Polymaker Silk PLA on my new MK4 with a 0.2mm layer height. I have a couple of parts that were loosing detail so I tried to print ar 0.1mm layer height. One part is a cylindrical shape requiring brim for support. Prusa Slicer sets the first layer to 0.2mm height by default and the brim prints fine. When it tries to print the second and higher layers at 0.1mm height, the filament does not adhere to the layer below and the printer just drags a rats nest of filament around until I stop the print. In researching this problem I found a couple of posts reporting the same issue. One proposed fix was a good clean of the build plate, but the issue is not with the first layer, it adheres nicely to the build plate. Others say to adjust the z-offset, but one respondent said the Prusa support says the MK4 ignores the z-offset in Prusa Slicer and sets the z-offset automatically when it probes the build plate.
Does anyone know for sure whether or not the MK4 ignores the z-offset in Prusa Slicer? If it does use the setting in Prusa Slicer, what value do I start with? If it does use the setting in Prusa Slicer, how does that affect layers printed at different layer heights (i.e. first layer at 0.2mm and subsequent layers at 0.1mm)? If the MK4 ignores the setting in Prusa Slicer, any suggestions on what to do to fix the issue?
The issue is the same with multiple filaments. Printing at 0.15mm layer height works fine.
Please supply a picture showing the issue.
Cheerio,
RE: Problem printing at 0.1mm layer height
If you get a good first layer but then see problems at higher layers, it's unlikely to be related to Z offset. You can adjust live Z manually by pressing and holding the control knob once the print has started. My understanding is that the Z offset value in PS is ignored by the Mk4 but I haven't verified this myself. In any case, adjusting live Z for the first layer should have no influence on higher layers — unless you set it so low that it digs into the filament and creates grooves that affect the next layer, or so hight that the filament comes loose.
If you were using IS, try without. I have had a lot of issues with IS and my default expectation now is that something will go wrong ☹️ I would also try to change the infill pattern, from the default that has intersecting lines to something like gyroid that doesn't.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: Problem printing at 0.1mm layer height
Sorry, I don’t know what IS stands for. I’m already using gyroid infill.