Snap-on CTC Dual bed levelling jig

thingiverse

Human: Crafted from scratch using the layout and coarse dimensions found at https://www.thingiverse.com/thing:2460482 OnShape link where users can edit to their custom specifications: https://cad.onshape.com/documents/28e0bcaa853c187d0624b81f/w/fd7acef5713bafce038c5cfe/e/7e7969d14473af0ccc5dd0ed **Enhancements:** - Attachments snap on instead of relying on magnets or other means - Wider base for improved stability and balance - Longer support for the indicator shaft to enhance precision - Offset on top allows clearance for the indicator dial **Instructions:** Print the design laying flat, using PLA material with 15% infill, no raft, and no supports. The indicator shaft may deform slightly during printing, so it has been oversized. **Design Notes:** The distance between rails is 70mm, rail diameter is 8mm, and indicator shaft diameter is also 8mm. All holes have been enlarged to 8.5-8.7mm to accommodate printer tolerances and facilitate smooth movement of the "carriage". Users can edit the first two sketches to reduce oversize if desired for a tighter setup. With this configuration, I experience about 0.05mm play or slop due to my warped bed (almost 0.2mm). However, the jig's slight looseness does not significantly impact readings. The chamfer on top may appear imperfect but allows for better printing without supports. **Snap-on Distance:** The snap-on distance is set at 0.7mm. Users can adjust this value to achieve a tighter or looser fit as needed. **Post-Printing:** The indicator should fit snugly ("good enough") with some room for adjustment. A hole has been designed for an M4 screw, which can be tapped for a secure attachment. Alternatively, users can employ an M4 nut retainer or drive the screw in without tapping if preferred.