Gap between different extruder / material parts after slicing
In Prusa Slicer 2.7.0-alpha1 with the "Original Prusa XL 2T Input Shaper (alpha) 0.6 nozzle" profile, create two boxes with a size of 0.66mm in x direction that are next to each other touching in y direction and assign two different extruders to the two boxes:
After slicing there appears a gap between the two boxes that I would like to avoid:
Does anyone have an idea which slicer setting is responsible for this gap?
RE: Gap between different extruder / material parts after slicing
I did notice that with the "Classic" instead of the "Arachne" perimeter generator the gap almost disappears. I haven't tested yet if there is a gap in the actual print anymore, yet.
You have only enough thickness for a single extrusion, this is going to fail in several ways, the gap is the least of your problems.
Even with brim this is likely to fail early as the print will not be stiff enough to support the pressure as later layers are added.
Rotate the part flat on the print sheet and elephants foot will probably close the gap for you.
Cheerio,
RE: Gap between different extruder / material parts after slicing
Thanks @diem for the words of caution. This case was intended as a minimum viable example to demonstrate an issue I am seeing in a more complex and actually printable print. I’m interested in how single extrusion transitions between two materials are done most reliably.
I noticed that in some cases one can push the two sides into each other with a bit of overlap to create a gapless interface when slicing. But this does not seem to be a reliable solution for more complex geometries where it’s not two boxes perfectly straight in line but more curved. Also, I value Arachne because it enables more flexible perimeter generation which I would like to leverage, so switching to classic is not that appealing.