Anet A8 PLUS Y-Axis Tensioner

thingiverse

This design assumes metric measurements. If your slicer expects inches when you import this, it will be very tiny and you'll have to scale it by 25.4 (or 2540%) for accurate printing. The stock Y-Axis tensioner on the A8 plus was a notable improvement over the original A8, but still fell short in many areas. This design fixes all of my previous issues with the tensioner. It offers 20mm of adjustment, clears the stock bed and parts effortlessly, keys tightly to the extrusion frame, allows for easy upgrade to a GT2 pulley if desired, and has maintained its tension after hundreds of hours of print time. To build this design, you'll need: (1) M6x1.75-40 button head screw (1) M6x1.75 lock nut (3) M4x0.7-10 button head screws (the extras from the Anet kit will work) (3) M4x0.7 T nuts (the extras from the Anet kit will work) (1) GT2 Timing Gear (optional) (1) M3x0.5-20 socket head screw (1) M3x0.5 nut It's relatively straightforward to assemble this design. The M6 locknut fits into the groove in the "screw" part, and the M6 screw threads through the "anchor" into the nut. The pulley slides into the slot on the "screw" part and is secured by the M3 hardware. The assembly is then bolted to the frame using the M4 hardware and t-nuts. You'll need to slide the T-nuts in behind the tensioner, as it's keyed too tightly to attach the nuts to the tensioner and then fit it to the frame.