Anet A6 Y-axis support with belt tensioner

thingiverse

Completely overhauled yet based on https://www.thingiverse.com/thing:2540258 Huge thanks to chekcian for the fundamental concept! The primary objectives by designing were to position the forces of the Y-axis movement in the center of the threaded rods and place the pulley close to the motor to minimize stress on the motor bearings. The distance between the motor mount and the front panel can be easily adjusted with the threaded rods and secured using nuts after installation. No large front and back support braces are required to print as all the Y-axis belt forces concentrate on the threaded rods. The only mechanical modification made to the Anet A6 is two small chamfers of 10 x 10 mm on the middle frame plate for clearance for the threaded rods. See picture. I used a loose metal saw for this without removing the frame plate. Required fasteners: 4x inside hexagonal bolt M4x25 1x bolt M4x20 or longer 2x nut M4 1x threaded rod M8x310 1x threaded rod M8x380 2x nut M8 with a width across flats of 13 mm (the M8 nuts that came with the Anet A6 have a width across flats of 13.5 mm and are not suitable for this design) Fasteners already included with the Anet A6: 4x bolt M3x12 7x bolt M3x18 1x bolt M3x30 9x nut M3 2x washer M8 The original Anet pulley made out of two pieces can be reused but I now use a solid one: https://www.aliexpress.com/item/32512894329.html order the one "without teeth 16T 3B" I also recommend installing a fiberglass reinforced belt that is much more flexible than the steel-reinforced belt that came with the printer: https://www.aliexpress.com/item/32934251683.html All parts were printed with a 0.2 layer height setting, 1.2 wall thickness, 30 percent infill and PETG filament. Some changes on this design on the date 2019-07-29: - The nuts have been deleted out of the front panel brace and replaced with cylindrical threaded rod end caps. Now the distance between the motor mount and the front panel can be adjusted with the threaded rods after installation. - The threaded rods are now 4mm shorter and the front panel brace is replaced. - 2x M8 nuts are removed. - The step motor was raised by 0.25 mm in the motor mount due to a measurement error. - The belt clamp is now better suited for a belt thickness from 1.38 up to the thickness of the original Anet belt that is 1.6 mm thick. - All changed files have a revision V2.