Design and Implementation of an Automatic Let-Down System for an Archery Draw Board

Abstract

The objective of this project was to design, test, and implement an improved archery draw board system. An archery draw board is a device that allows the user to draw and analyze characteristics of a compound bow. The bow is placed in the device and a winch mechanism is used to draw the bow string for analysis of bow parameters such as cam alignment, cam timing, and draw weight. Analysis of these parameters can allow the user to tune the performance of the bow. A new feature, the Automatic Let-Down System, was designed, tested, and implemented to achieve this goal. The design objectives for the Automatic Let-Down System were to improve the ease of use, speed, and safety of the draw board. The system allows the bow string to safely come to rest from full draw at a reduced speed without manipulation by the user. This improves upon current draw board designs that require the user to manually turn the handle of the winch to return the bow to a state of rest. The device was successfully designed, implemented, and tested with the design objectives in mind.