Tre-BOE-chet

This is an adaptation of a trebochet to fit on top of a Parallax BOE-Bot. It is activated by a signal from the ultrasound sensor on front of robot. The servo lifts and frees the tab holding the slinger down when it gets close to an object. Print the slinger laying on its back with the void spaces in cup and weight holder pointing up. I designed it to print that way with no support needed. I added files here for the Scribbler 3 robot also.