The Shield, Mk IX - First responder shield

prusaprinters

<p>EDIT: UPGRADES HAVE BEEN MADE! The new models, Mk IXb are the latest revisions, and work far better for layer separation. If you were having layer adhesion issues, this should solve them for you.</p> <p>For a couple weeks, our makerspace has been printing PPE for local doctors and front line workers. We quickly fell in love with Joel Telling's "Manta Ray" face shield, as it combined the best of two NIH-approved models, the Prusa Shield, and The 3D Verkstan shield. With nearly 1,000 pieces of PPE printed, the most significant feedback we received from those who had used both of the other shields was that the Manta Ray put the shield material too close to the user's face, making it more prone to fogging from breath. After a number of revisions, this shield visor is the end result, and we feel it brings together the best of all current NIH-approved shield designs. It has the curved front and distance from the face that makes the Prusa shield superior. It also features a headband that holds to the head on its own and doesn't require a band for most users.</p> <p>There are nine files included - Cap file, for making a cap that pressure fits on top of the frame. Visor files, in two classes. Each class has a model with 1, 2, 8, and 12 visors. The two classes are identified by the end of their file, and are as follows:</p> <p>CREALITY: These are better for <em>most</em> Creality machines and others where 0.28 layer heights are optimal for the machine.</p> <p>GENERIC: These are designed with 0.3 layer heights, and will print on a vast majority of printers with a 0.0025 "magic number"</p> <h3>Print instructions</h3><p>PRINT GUIDELINES:</p> <p>--NEW - There are two sets of files. Files ending with "X-generic" (where X is 1, 2, 8, or 12) are stacks of the number indicated by X, and are optimized for 0.30 layer heights. Files ending with "X-creality" are optimized for creality and other printers with similar magic numbers, and should be printed at 0.28 layer heights.<br/> --Has been tested in PLA and PLA Pro/PLA+<br/> --Walls should be at least 1mm thick (2-3 walls depending on nozzle and line size)<br/> --Three top and two bottom layers as a minimum<br/> --Infill can be 0 to 100% based on preference (heavier infill will produce stiffer prints)<br/> --For stacked versions: make sure that your slicer has "thin wall" printing enabled so the shims print, which makes separation easier<br/> --This model has been printed on a multitude of machines, using a variety of plastic and nozzles ranging from .4 to .8 with few problems. One minor "hack" to speed up printing if using a .6 nozzle is to set your line width to .52 in your slicer, which will "defragment" some lines that don't print continuously with .6mm line widths</p>