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 (https://www.thingiverse.com/thing:2854971) 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 for the BLV Ender 3 Pro upgrade that uses an Hiwin MGN 12H linear rail on the x-axis. The design emphasises the mechanical strenght of the whole assembly: - It re-uses the x-axis belt bracket supplied with the BLV upgrade kit so the belt can be properly tensioned. (**Attention**: you have to drill out (try a 3mm drill first or a 3.5mm if you have one) the center hole of the aluminium part to make it a through hole for an M3 bolt. The hole is highlighted in screenshot #2. - The Hemera/Hermes is mounted in a way that produces minimum flex in the adapter bracket - The adapter bracket is thick enough to allow the usage of three M3x8mm screws supplied with the Hemera. (For the one screw that goes through the belt bracket, you have to shorten a M3x20mm screw to 18mm or use some shims under the screwhead - this is important as using a screw which is too long will damage the Hemera/Hermes) - I cut a channel that allows you to rout 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 fix 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 downside, you have to 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 whole bed.