Float LM8UU bearing mount for Anet a8

myminifactory

Experimental floating linear bearing mount, utilizing printed leafspring for stabilization, designed to address grinding issues with stock Anet A8 linear bearings. The original bearing's pixie dust problem is resolved by replacing it with a printed bushing, but this results in a slip-stick issue affecting print quality. Even when the Y axis bearing is aligned smoothly, pressure from the bed level spring causes the Y carriage to bend slightly, leading to grinding and lockup. To alleviate these issues, I designed an experimental LM8UU float mount that reduces rotational force on the linear bearing while maintaining stiffness in lateral Z and Y axis forces. According to igus.com's DryLin Linear Bearings 2-1 Rule, a floating bearing mount is only required for one rail in the Y carriage. For Anet A8 printers with black plastic bearing mounts, printing two float mounts for the Y carriage and one for the X carriage should suffice. The fixbearing.stl file is provided for users with stock mounts of different heights. This experimental mount has been tested on an LM8UU bearing with PLA filament for over 100 hours without encountering pixie dust issues. Installation may require a 4x M4 screw and nut.