15mm thin | USA 3-hole | ear flares for comfort

prusaprinters

<p>A remix of Prusa's RC3 USA 3-post face shield with:</p> <ul> <li>15mm z-height vs 20mm for Prusa's (quicker print and 25% less material with minimal impact on durability)</li> <li>improved comfort near ears via 7.5° flare</li> <li>filets instead of chamfers to reduce fabric snags</li> <li>optimized for pre-punched overhead projector transparency sheets with elongated outer holes OR manual 3-hole punch with circular holes</li> <li>posts have ridges at the tip to prevent thin plastic from falling down if holes are not the exact size of the posts</li> <li>no logos</li> </ul> <h3>Print instructions</h3><p>For Mk2.5 and later (Mk2 OK too, but slice your own gcode!)</p> <p>Standard PETG 0.4mm nozzle profile is OK but here are some optimizations for print speed without bumping extruder beyond 240 degrees and impacting quality/reliability of prints:</p> <ul> <li>layers &amp; perimeters<ul> <li>0.25 layer height</li> <li>3 bottom and 3 top layers</li> </ul> </li> <li>speeds<ul> <li>70-90mm/s inner perimeter speed</li> <li>60-80mm/s outer perimeter speed (depending on printer tuning, there may be surface ghosting which won't affect durability or comfort)</li> <li>60-70mm/s gap fill (most "gaps" are long stretches between perimeters so this won't vibrate the printer too much)</li> <li>100-200mm/s infill</li> </ul> </li> <li>infill<ul> <li>15%</li> <li>gyroid interior, rectilinear top/bottom</li> </ul> </li> <li>advanced<ul> <li>0.5mm first layer extrusion width (improved bed adhesion)</li> <li>0.6mm infill (speed)</li> <li>0.5mm solid infill (speed)</li> </ul> </li> </ul>