Breathable Filter case for 2091/2097 filter of 3M Mask (Glue-free) - Cap Fix

thingiverse

Remix of jlmaoju's 3M Mask Filter Case (Cap Only) to fix printing issues I was having with Bridge Infill for the part that creates the opening in the Cap. I was consistently getting too much sagging because of the near one inch bridge gap that it used to create the layer. Additionally, on my Prusa at least at 0.2mm, the piece was only being made with two layers, the bridge infill layer and then the top solid infill. This lead to my first few prints not having a fully solid piece where the opening in the cap is, which would make it less effective at protecting the filters. So I modified the design in two ways, first I added 6 additional supports for the opening in the cap for a total of 12 instead of the original 6. I also then made the opening panel thicker so it printed the bridge infill, two internal infills and finally the top solid infill. This made for a much more solid panel for the opening without supports with minimum sagging when printing at 0.2mm. I also tried 0.3mm and that seems to work better now too, In addition to these model changes I also changed the bridge flow rate and speed which together seems to have made my prints more reliable.