MP Select Mini V2 bed mod brackets

thingiverse

These are brackets I designed to upgrade the size of my print bed on the MP Select Mini V2. They allow you to attach a larger build plate. The tolerances on the holes may be a little tight so some post processing may be necessary. The ones pictured are printed with petg. When I printed them with PLA, the holders for the rods would crack if over-tightened. I made the countersinks for the the mounting nuts very tight to hold in place while attaching the new bed. Use a screw and a wrench to "pull" them into place before attaching your new build plate. There is now a PDF template to drill the holes for an MK2B PCB heat plate. It is designed for 8.5 X 11 paper, but a custom larger size is recommended. Print full size, but depending on your printers margins, it may not print the corner holes completely. If so, measure out from the center hole 104.5mm to each side to mark center for drill. Then use a square and mark 209 from top holes to bottom. The plate I made is 9" by 12". Mount the brackets no more than 15 mm in from the left side and attach the heat plate according to your X and Y end stop position. I used the same screws, springs and washers from the stock mpsm to mount the heat plate. There are a couple of "things" that have been incorporated into this design. 1. The belt tensioning is a mix between https://www.thingiverse.com/thing:1784375 and https://www.thingiverse.com/thing:2501525. The belt tensions from the back. I used a piece of sheet metal from Lowes then drilled and tapped the holes for the heatplate. This will raise the level of the bed so I would suggest using an adjustable endstop like this one.. https://www.thingiverse.com/thing:2217149 The additional length and weight of the bed will change the center of gravity on your printer causing it to want to lean backwards. I overcame this problem by adapting some feet to widen the stance of the printer. The ones I used can be found here: https://www.thingiverse.com/thing:2821402 This is my first "thing" on here and I am an absolute amateur. Any helpful feedback is appreciated. *1/30/18* Files updated due to a very slight misalignment of the timing belt. Only was causing a problem at speeds over 120mm/s. Added extended brackets for more support. These are too big to print on the mpsm stock bed, I printed the short versions, built the new bed then printed these and replaced the short ones. I also added an add-on brace to make the extended option a 2 part print if someone so desires. I haven't tested it myself, but should snuggly fit. Thanks for all the great feedback!