AnyCubic Predator End Stop Shims

thingiverse

Some AnyCubic Predator (D) printers are plagued by issues detecting end stops placed on pulley sliders. The end stops, black metal pieces attached to the top of pulley sliders with a pair of 2mm screws, are designed to poke into the electronic control box and interrupt optical limit switches. A photo labeled "A" shows the end stop in question. The problem lies in inadequate testing of electronic control boxes after assembly, causing limit switches to be mounted in such a way that the end stop cannot fully insert into switch bodies, disrupting light beams. As a result, any of the three vertical stepper motors may continue grinding until power is shut off. To address this issue, shims are provided to fit between pulley sliders and end stops. If experiencing grinding noise, try placing a 1mm shim first at the vertical beam/pulley slider causing the problem. Shims come in 2mm, 1.5mm, and 1mm thicknesses, measuring tiny. Printing three of each size yields a total of nine shims. An initial attempt to fix the issue used flat washers but proved cumbersome; however, it did work. Shims offer an easier solution. A photo labeled "D" demonstrates a temporary fix using flat washers. Further testing is needed, and updates will be provided if necessary. These shims can also be designed on Tinkercad using a simple design.