EXAMPLE: Multi-Diameter/Height/Material Print

Someone asked for an example project with multi-everything and I obliged.

https://forum.prusa3d.com/forum/original-prusa-xl-tool-changer-how-do-i-print-this-printing-help/use-case-study-multi-diameter-and-material-print/

Extruder 1: Pla for supports 0.4

Extruder 2: Pva for Support connection 0.4

Extruder 3: Pla for infill 0.8

Extruder 4: Pvb for perimeter 0.25

Using Prusa Slicer 2.9.1 which officially supports multi-diameter-nozzle prints.

I have not test printed this whatsoever; it's just a proof of concept which successfully slices and will print. How successful the print turns out because of various variables (temp differences, how well different filaments bond to each other, etc) is not the point, but something you must take into account when attempting a real print.

A couple things of note:

Automatic infill combination is based on nozzle diameter, not layer height. Very confusing if you didn't read it's tooltip; not sure why it's set to 100% by default instead of something more logical like 75% (max recommended layer height based on nozzle size). Much less confusing to just use the Combine infill every parameter instead of the Automatic infill combination feature.

The multi-layer-height infill feature ("Reducing printing time" section of Print Settings>Infill) seems to only work if both the Infill extruder and Solid infill extruder are set to the same extruder. It will otherwise not do as expected and will not give any warnings nor errors. Because of this the top and bottom of the model is printed using the same extruder as infill - this is unwanted. The workaround is using the painter tool to paint the tops and bottoms of the model(s) as the same extruder as your perimeters. 

• Bug report: https://github.com/prusa3d/PrusaSlicer/issues/14434