Anet A8 Y motor brace

thingiverse

I built this brace to work seamlessly with Leo_N's rear frame brace (https://www.thingiverse.com/thing:1852358) to prevent shearing loads on the Y-motor mounting bracket. Your printer must be mounted to a sheet of MDF, plywood or something else to make use of this bracket, it's designed to be part of a system to remove load from the acrylic frame so it's not attached at all to the printer. Leo's bracket isn't entirely capable of stopping sideways deflection of the motor mount because of the way the printer's frame is designed, and his bracket is designed to stop the belt tension from warping the rear acrylic plate more than stop the motor from being pulled sideways, although it does a decent job of it. I recently had my motor mount plate spider crack on me, so I printed up a replacement and then designed this bracket to attach to the MDF panel my printer is affixed to. It's purpose is to eliminate any shearing pull on the motor bracket and rear frame, and redirect it all into Leo's brace instead. It will also stop any belt tension from pulling your motor at an angle and wearing the left side of the belt out on the wall of the pulley. As a test after I attached it, I cranked my belt tension up to see how tight I could get the belt before the motor started to shift or the rear frame showed signs of bending, but before either of those things could happen the belt ripped itself free from its mounting clamps on the y carriage. I'm calling the brace a flying success after that. The holes are designed for screws with a 4.15mm thread diameter and an 8mm button head, but step files are included so remix away! I can also provide alternate versions with different screw hole sizes upon request.