Elegoo Mars 3 FEP Replacement Helper

by Erwins_Cat

This is a small helper for replacing the FEP of the Elegoo Mars 3 VAT. The VAT of the Mars 3 is slightly larger and oddly shaped so I designed a good fitting helper. The FEP sheet of the Mars 3 (and other Elegoo printers) must be installed slightly floppy and gets tensioned afterwards by screws under the VAT. This FEP replacement helper will provide the optimal curvature for the FEP so it gets perfectly tensioned in the end. I fully tested the helper, see the pictured guide on how to change the FEP sheet. --- Currently, there are now three ways to print it: (1) The one-piece version can only be printed with an FDM printer or on a larger format SLA printer like the Elegoo Saturn. The one-piece version is 192x140x13 mm^3. (2) The two-piece version can be printed on dialed-in Mars 3. Please see attached image for orientation for best results for the puzzle noses. Of course, the two-piece version can also be printed on FDM printer, albeit the gap of the puzzle pieces might be challenging small for some cheaper FDM printers. (3) The four-piece version can easily be printed on Mars 3. The pieces are smaller and can be printed quicker but placing the many supports for the puzzle noses might be too annoying (at least for me). **Remarks for SLA version**: I recommend dialed-in resin settings for Mars 3 for best results and perhaps a resin mixture of ABS-like and Siraya Tech Tenacious 3:1 to provide enough flex to the puzzle noses. The gap between the puzzle pieces is 0.2mm, so there is currently some room for printing imperfections. You can always print only the top part with the puzzle noses if you want to see if your printer settings match the 0.2mm tolerance, see image attached. (If someone needs a larger gap because the puzzle pieces are too tight, then write me a message. Previous purchasers confirmed that 0.2mm gap fits perfectly for them) --- **Small guide on how to replace the FEP:** I added the whole process as a small image gallery. The essential tools are: 1. hex