Compact servo auto level with optical sensor

thingiverse

This variant of an auto level stands out for its compact size. The dimensions are 43.4 * 20 * 43.5 mm. I tested various options, but none worked properly on my printer and didn't fit snugly against the walls or carriages. After multiple design revisions, this is the latest version. The body is divided into two parts for easier printing, which need to be glued together. For added stability, I used 1.75 mm rod pieces. This auto level features Emax ES09MA, an optical endstop, a spring (ideally 3.5 mm in diameter and 17 mm long), and a 2.5 mm rod (31 mm long, cut from a knitting needle). It's printed with ABS using 100% filling. Before gluing the case parts together, adjust the Servo_pin surface to ensure smooth movement without resistance. All holes are slightly undersized and require reaming. The measuring rod hole is 2 mm, but needs to be enlarged to 2.5 mm. For securing the optical endstop, I used M3 thread, but a nut will suffice if no tap is available. Before installing the servo, properly orient Servo_arm. First, set the M280 P0 S0 command to zero degrees and then attach Servo_arm. Next, test the range of motion with commands M280 P0 S15 (down) and M280 P0 S82 (up).