Dual Z Motor Mount for Tevo Black Widow

thingiverse

This design for the Tevo Black Widow uses a bearing assembly commonly used on TronXY printers to support the weight of the gantry. This bearing mounts on top of the mount and beneath the drive coupler. It can be sourced here: https://www.tronxy3d.com/products/tronxy-3d-printer-part-bearing-seat I put a few 3mm screws through it with washers underneath and on top to hold it down but left them loose just a bit so the bearing can move around and articulate a bit. It will always have the weight of the gantry holding it down so it should never affect Z positioning. And there is room below this plate to mount the stock TEVO bearing and a lock collar. And both can even be used as I am doing with care given to assembly to make sure I am loading the top bearing at least as much as the bottom bearing if not more. For my build I am also using a 30mm spacer on top of the extrusions and with the bearing plate and the top mount I am using 5mm hardware with a 55mm shank and the motor mount screws are m3x8mm. The spacer has a wire guide for the Z stepper on the backside and I have included 2 versions of that here with the motor mount.