Hemera mount for Hiwin MGN12H linear rails (BLV Ender 3) incl. belt tensioner

thingiverse

** Updates ** 19 Jan 2020 - STEP files added 13 Feb 2020 - Belt tensioner added I used Cornely_Cool's design and adapted it for my Hemera setup. You need 2x M5x8 screws, 2x M5 t-nuts, and the tensioner screw and knob from the above thing. ** Original text ** Maybe this design is useful for you... This mount is designed specifically for the BLV Ender 3 Pro upgrade that utilizes an Hiwin MGN 12H linear rail on the x-axis. The design emphasizes the mechanical strength of the entire assembly: - It reuses the x-axis belt bracket provided with the BLV upgrade kit, allowing the belt to be properly tensioned. (**Attention**: You must drill out (try a 3mm drill first or a 3.5mm if you have one) the center hole of the aluminum part to create a through hole for an M3 bolt. The hole is highlighted in screenshot #2. - The Hemera/Hermes is mounted in a way that minimizes flex in the adapter bracket. - The adapter bracket is thick enough to allow the use of three M3x8mm screws supplied with the Hemera. (For the one screw that passes through the belt bracket, you must shorten an M3x20mm screw to 18mm or use some shims under the screwhead - this is crucial as using a screw that is too long will damage the Hemera/Hermes) - I cut a channel that enables you to route the hot end fan wires between the Hemera/Hermes and the adapter bracket. - There are three attachment points for zip-ties that allow you to neatly mount the heater cartridge and thermistor wires. - It includes a 30 mm long outlet to secure the bundle of wires that exits the x-carriage with two zip-ties. On the opposite side of the Hemera/Hermes, you can mount any generic bed leveling sensor mount and fan duct. There are some nice designs on Thingiverse. As a drawback, you must relocate the x-axis endstop switch. The bracket STL file is also included. Also, the linear rail needs to be moved to the right (viewed from the front of the printer) for the nozzle to reach the entire bed.