MonoPrice Select Mini Bed Expansion V2 (150mmx230mm)

thingiverse

This is a revision of YourDrunkle's design. I've updated the bed holders to work with thumb-wheels. Two versions of the thumb-wheel are included, and you can print 4x of whichever one you choose. The photos above and the summary below are pulled directly from Yourdrunkle's design. This is a modification to expand the MonoPrice Select Mini's print bed depth to 230mm on the cheap. I've managed to utilize a printable area of 130mm x 220mm with just these modifications. The price once built was approximately $60 for me, nearly the same as the unheated version of the "4th dimension modifications" "Maximus" kit but my build includes a heated bed. Note that you will need to upgrade the Select Mini's power supply to utilize the heater, and I hope to be making a basic guide for that soon. Some notes about this project: * No special tools (except a 3D printer) are needed for this project. A hacksaw was used to cut the aluminum, scissors, a drill with 1/8" and 5/32" drill bits, and a measuring device. * Most of the non-3D printer specific parts (8mm rod, belt, and the bed itself) were purchased from my local Ace Hardware. * A lot of Imperial sized (6-32) bolts instead of Metric (M3 or M4) bolts were used. I'm in the US, so they are WAY cheaper locally. Links to what was used: Print Bed: https://www.amazon.com/gp/product/B01AAYY70Y/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 Belt (note: this is WAY too much belt. You only need ~30cm and could save money by buying a smaller quantity): https://www.amazon.com/gp/product/B00F2IQNX8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 Rods: https://www.ebay.com/itm/300-350-400mm-8mm-Chromed-Rod-Parts-DIY-CNC-Linear-Rail-Shaft-for-3D-Printer/122850462999?hash=item1c9a754d17:m:m3bE2vd9IhcoeTMEq0XmC7Q Everything else was locally purchased at Ace Hardware. A REALLY REALLY BRIEF BUILD GUIDE: Looking at the printer as it comes apart is crucial. This "guide" is very broad and skips a lot of stuff that you should be able to figure out on your own. * Printing I printed everything with 100% infill and 0.1mm layers with PLA. Time will tell if the PLA holds up tot he heat from the print bed, but I am confident. * Cutting Aluminum Cut aluminum to 150mm for the front and rear and approximately 2-5mm shorter than your rods for the left and right sides. It's okay for the aluminum to be a few mm short but not a few mm long. * Drilling Assemble and square the frame off of the printer. Ensure that the 8mm rods are against the aluminum and are the same spacing as on the printer. Use a 1/8" drill bit to drill through the holes in the 3D printer parts. Expand the holes shown in the pictures in the aluminum only. * Assembly When the frame is initially assembled on the printer, do not tighten the 2 screws in the front and rear that were drilled oversized. Push the frame to the farthest back point of travel and tighten the front screw and vise versa. This prevents binding. * Installing the bed When installing the bed, I placed the connector for the electronics toward the outside of the printer. It will bind if placed on the inside. * Installing the belt The belt loops through this frame differently than the stock printer. However, it still goes through the stepper motors the same way and the layout in the frame should be obvious. The ribs in the belt will sit in the ribs on the inside edge of the frame.