Rostock Onyx Bed leveling Aid

thingiverse

The Onyx heated bed leveling aid, with a 280mm diameter, helps fine-tune delta radius and Z-level. It features two concentric circles with 12 marked measuring spots plus a center point. The layers are 0.3mm thick, with 1mm wide lines, and the circles have diameters of 240mm and 120mm. For Rostock Max delta rods, the outer rim ensures complete verticality near the three columns. V2 is designed for users with a fan attached to the moving platform on the same side as the extruder mount. An alternative version exists for 200mm boards (180mm and 90mm circles) along with one featuring only the inner 120mm circle. To use, choose V1 or V2, slice while noting additional skirts, adjust Z height and bed level in heated condition, ensure print head doesn't touch anything, heat print bed evenly, print, peel off without stretching for accurate measurements, measure at 12 spots plus center, make necessary firmware and axes adjustments, and repeat until satisfied. Ensure your nozzle is almost at perfect Z level (+/- 0.15mm). V2 requires manual centering due to the missing arc.