Creality Ender 3 Y Axis MGN12H Linear Rail Mod
thingiverse
UPDATE - 7/11/18 I upgraded the drill guide to V2, moving mounting holes for belt retainers out 3mm to better align belt path. Thanks to thisiskeithb for pointing out need for upgrade (I didn't use original drill guide for my mod). Stock Y axis on Ender 3 has problems, soft aluminum plate makes wheel alignment challenging. Wheel spacers dig in, causing wheels to bow. Even when wheels work well, I still don't like them for Y beds. This fix addresses that. Re-used existing bed plate, idea is to create 3D printable drill guide registering with vwheel mounting holes so anyone can do this easily. Used 300mm MGN12H rail for this modification. Relocated Y axis switch with spacer. Stock Y belt re-used and attaches in same insert-slot fashion using printed belt holders. https://www.youtube.com/watch?v=MP9ZNbGq6gE
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