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This document outlines the latest design changes to our suspension bridge system, focusing on reinforced base and improved arm features. The modifications significantly increase the system's resistance to deflection, shifting from a rack and pinion mechanism to a moment arm approach. Utilizing the servo as a counterweight enhances weight-lifting capability, with maximum required torque at 48 oz-in against a motor output of 54 oz-in. Future improvements aim to reduce system weight, further enhance deflection resistance, and optimize servo setups and arm lengths.
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Group 16Screwheads Mike Harrison, Jeremy Ozer Mark Brandau
Design Changes • Still using suspension bridge idea, but have greatly reinforced the base and have improved arm • Improvements greatly increase strength against deflection • Gone from rack and pinion to moment arm to lift weight, using the servo itself as a counterweight and grabbing the screw on the weight with a hook
Performance • Torque – maximum necessary is 48 oz-in. Motor can put out 54 oz-in • Motor generates sufficient torque to lift fully, but we are encountering too much deflection at present to reach it
Future Improvements • Further improve resistance to deflection • Drop weight of system by removing portions of baseplate • Optimize servo setup • Optimize arm lengths
