MPMD Magnetic Enclosure Frame

thingiverse

**Update:\r** 01/22/2020 - I installed an all-metal extruder, which revealed that the frame for the extruder side (top) won't fit with the new lever. I'm designing a new piece to alleviate this issue and will upload the STL when it's completed and tested. The S2 Extruder Top files are designed for an extruder with a slightly longer release arm. The material on that particular enclosure side needs to be about 10mm shorter in height, and the part requires supports to print. **Update:\r** 11/20/19 - I added a better extruder top section, which makes it easier to push the handle. It does require supports to print. **Summary:** About a year ago, I designed draft shields for the MPMD. Recently, I decided to improve the concept so that they would be closer to actual enclosure doors. I spent time designing and printing frames and hinges that clip to the MPMD frame. After some trial and error, I settled on a design using thin rods (for hinges) and multiple hinge parts. The door worked well but was tricky to snap into place. I threw out my previous design and started again, eventually going back to my original concept - a magnetic, removable panel. This design has several advantages: it can be placed easily, removes quickly, and only uses 4 printed parts per side and a single piece of 2mm door material. The base and top frames can be fastened together using an M3 bolt (about 10-15mm). Each side also has places for 12mm neodymium magnets that stick the base to the bottom plate. These should be glued in place. **Note:** Magnets are optional. Each side requires 2 Left and Right pieces (4 total). The extruder side caused some issues due to the release lever, so I had to alter one of the parts for it to slide past the handle and allow operation with the shield in place. This altered part is available as an STL file. The size of the opening is a little odd, so I used 8x10 sheets and cut them down since I couldn't find anything closer to 9x6. The size needed is about 146mm x 225mm. Make sure you measure your openings and use those measurements. I positioned my inserts so that one side sticks out slightly, and the other is flush. This allows me to insert one side with the door material acting like a hinge and then slide the other side in tight. Once fitted, it's probably a good idea to glue these parts in place and fit the door while the glue is drying. **Note:** This frame requires that the column base be unobstructed at the corners. If you have snap-in shields, they will interfere with the enclosures. The enclosures will fit with these shields: https://www.thingiverse.com/thing:3880713 The part is quite a close fit, so make sure all pieces are carefully fitted before use. I use a flat file to even off the edges that mate and fit against the columns. It's also easier to fasten the two parts using an M3 screw by placing the parts on the printer with magnets. Keep an eye on your print as the outer edges may lift if your bed adhesion is not good enough. I applied a thin layer of glue stick to my glass bed, which allowed me to use a skirt instead of a brim and made cleanup easier.