REMIX of DtM v3.0 NIH approved face shield for Vase Spiralize printing

thingiverse

BEFORE PRINTING THIS IN BULK FOR LOCAL MEDICAL FACILITIES, MAKE SURE TO PRINT ONE AND LET THEM APPROVE IT FIRST!!! All files have been updated to (rev3) to close openings in shield pegs since this would permit aerosol/liquid transfer from outside to inside directly. This issue is now fixed; let me know if you find any more issues. One other problem: something in Prusa Slicer prevents me from slicing faster than 85 minutes. I don't know enough about Prusa Slicer to figure out where the bottleneck is. If anyone knows, please let me know. I have also included the factory file for those using Simplify 3D. If you do not need the "visor" portion, just print process 1 alone and it will take 33 minutes! (First 12mm) I have added a Euro 4 hole punch version and G-code. Print both processes for all of it. I remixed the DtM v3.0 (https://3dprint.nih.gov/discover/3dpx-013238) shield by tprestero without changing any dimensions or fitment. I just remixed it for "vase mode" spiralize printing, which allows it to be printed in about 1/3 the time (50 to 65 minutes per) and use less material – almost half the material at 27g. It is more flexible where it needs to be (head band) for comfort and is now an "open structure," which will improve sanitation. IPA can now get inside, and there are no closed cavities to retain anything. I am including G-code that should be compatible with any printer having a 200x200 or larger build volume. On some less capable machines, you might need to slow down a little (try 75%); on better capable machines, you might be able to go faster (diminishing returns when it's so fast now). The tricky parts are the first layer – it needs to go down well – and the "head visor" portion (over 12mm in Z). You might need to slow down for this or lower layer height if it gives you trouble. If you slice and it's not doing vase mode, that's a "thin wall behavior" issue. In S3D, go to advanced and set for thin wall and thin fill with 100% overlap; in Cura, I think you need to turn off thin wall detection and set overlap. Then it will print in vase mode. I have printed it on five different machines from different manufacturers and had no problems so far. If you want to slice yourself, use no top or bottom layers and one perimeter in vase mode or spiralize outer contour mode. Make sure your "start point" is somewhere along the visor arc (0,0 is usually good), as the transition at 12mm can cause "oddities" in vase mode if you don't make the start point in the "arc" of the visor. If you get retractions and vase mode breaks, enable thin wall compensation with 100% allowed overlap, and the problems will go away. Some parts of the model nearly intersect – this is to allow reinforcement ribs that are vase compatible to connect different perimeters for more stiffness and strength. The thick version STL is for large nozzles; use regular vase mode for a 1.2mm nozzle, an extrusion multiplier (EM) or Flow Rate of 1.25 for 1.0mm nozzles, and 1.5 for 0.8 mm nozzles. You can use 0.6mm layer height for the first 12mm but not for the visor; 0.3mm max recommended (the layers will fail at higher than 0.4mm too much horizontal deviation per layer). With the thick model, it can be printed in under 40 minutes! It will, however, be a little heavier – 50g – but also super strong and rigid.