Belt tensioning modification for Anet A8

thingiverse

Belt Tensioning Upgrade for Anet A8 and Similar 3D Printers **Warning:** This modification will stretch your belts, requiring an upgrade to fiberglass-reinforced belts to prevent dimensional errors in prints. To apply this upgrade, use M4 hex head screws and nuts for the tensioning knobs, readily available at Home Depot or Lowes. For the X-axis, a 50mm bolt is required, while a 25mm bolt suffices for the Y-axis. A thumb nut is used for the Y-axis, whereas a thumb screw is utilized for the X-axis. To secure the X-axis rods, two M3 Allen head bolts are employed to apply pressure rather than exerting force on the Z-carriage, which would put additional stress on the Z-axis rods. Adjust the setup so that approximately 1mm gap remains between the Z-carriage and the bridge component. Before applying significant tension to the Y-belt, consider installing frame braces, as excessive pressure can cause the acrylic frame to crack. For the X-belt, the provided photo demonstrates an anti-Z-wobble modification; however, this is not essential for belt tensioning. Nevertheless, replacing belt attachment components with custom designs (available at Thingiverse: 1433295) is recommended due to their ease of use.