Bondtech Style BMG Extruder Direct Mount for Maker Select, Wanhao i3, Malyan, Cocoon Create

myminifactory

This is a direct mount for BMG (Bondtech or clone) extruders specifically designed for Maker Select/Wanhao i3/Cocoon Create printers. I used a Dotbit Dual Drive Extruder purchased from Amazon. The Plus versions of this printer, with the built-in screen, require a different X carriage bracket, necessitating that someone create a revised version. This direct swap entails no adjustments to the heated block or nozzle height. Important notes: An aluminum spacer is required between the heat block and the heatsink to prevent interference with the face plate. A thin piece of angle aluminum or an aluminum strip 1/8" thick with holes drilled through should suffice. The heatsink and fan now mount only to the cold block, necessitating small M3 nuts on the back side of the cold block to secure it against the block. Install these components first, as they are difficult to access once the extruder and motor are in place. The BMG extruder comes with 4mm OD PTFE tubing; approximately 24mm of this tubing should be threaded through the 4mm hole in the extruder bracket plate to guide the filament towards the hot end. Additional longer bolts are required for the bearing block, as the bracket mounts at the top two bolts holding the X carriage bearings. This added thickness necessitates the use of longer bolts. A slight loss of Z height and X axis length occurs due to the BMG extruder's slightly increased height and width.