ANET A8 Y frame "exoskeleton"

thingiverse

Based on Matsekberg's brilliant design, here are some improvements: - A full Y-axis motor support featuring the left part, diagonal stiffeners, and an enlarged right part that can be attached securely within the cylindrical hole of the ANET back plate is included. (This design improves rigidity significantly.) - The Y axis motor support allows for the addition of an external carbon stiffener to the rear plate, creating a robust frame. Please see my exoskeleton on Thingiverse: https://www.thingiverse.com/thing:2430113. Although this remains optional, I strongly believe it's essential. Without installing this carbon rod, some flexion may occur in the back plate when pressure is applied to the belt. The right rod presses against the support, but the back plate still moves. During fast prints, you can feel vibrations caused by the motor and Y carriage at the center of the back plate... Installing the carbon rod renders the frame rigid. - The front plate adaptor is completely stress-free; I simplified it by removing the L bracket. The front support for the rods features an open hole to allow for easy assembly without disassembling the ANET's frame. - The belt tensioner remains mostly unchanged but is now fully parametric, designed with OpenSCAD. Please note that the motor mount piece (the large one) was designed specifically for a new-generation Anet A8 purchased in July 2017. I cannot guarantee its compatibility with other models... The square and cylindrical supports fit perfectly into their associated holes in the ANET's back part. No sanding or filing were necessary; simply remove the tiny plots left by the supports. Thank you, Matsekberg, for this ingenious idea – undoubtedly the best mod for Y belt! EDIT (170904): A mistake in an equation of the Y-frame piece resulted in non-parallel rods, 8mm apart. I corrected this in this new release. Sinobi is thanked for pointing out the error. EDIT (180113): Under high-speed conditions, the 6mm threaded rods may vibrate within the front support. I redesigned the entire front support to include two M6 nuts that fit snugly inside the holes, eliminating vibrations.