slotted wheel

thingiverse

User contributed design for an adjustable timing wheel with interchangeable parameters, constructed as an openSCAD model featuring a large-diameter hub on an 80 mm wide, 32-slot disk. Measured through photointerrupter circuits the overall slot gap deviation of the assembly appears to be 5% variation across 4 mm slot openings, indicating relatively high positioning accuracy when built using a reliable and precise FDM (fused deposition modeling) setup such as an Ultimaker 2 three-dimensional printer system. This original contribution is directly sourced from a publicly shared repository located at thing:28121 created by open-source developer jpearce, the specific modification to "chopper wheel" configuration incorporates interchangeable M3 set screws into 5 mm hole for enhanced reliability. The precise slot angle cut was engineered as close as feasible to ideal cutting performance in an active blade form using optimized angular vanes creating more optimal functionality when paired with accurate drive system and optical switch control, ultimately providing an extremely accurate chopper timing result during its actual operation