GWS Servo 360 Modification GWS Servo 360 Modification Revision: December 22, 2010 1300 NE Henley Court, Suite 3 Pullman, WA 99163 (509) 334 6306 Voice (509) 334 6300 Fax Overview This document describes the steps necessary to modify a GWS Servo for continuous rotation. Please note: performing this modification will void both GWS and Digilent warranties. Features of the GWS Servo include: 0.23 second/60 degree rotation with 47 oz-in of torque at 4.8V 0.18 second/60 degree rotation with 56 oz-in of torque at 6V 3-pin Futaba-style connector GWS Servo a variety of servo horns, grommets, and mounting screws The GWS Servo can be used for many applications. The most common use of servos is as actuators. Their ability to move with Instructions relatively high torque through a path at constant velocity makes them very useful. Step 1: Remove the screw that attaches the wheel to the servo. However, a servos limited rotation (~215 degrees in this case) is a barrier to some designs. There is a tradeoff to modifying a servo for continuous rotation. To allow the servo to continuously rotate, the feedback sensor must be disabled, which effectively turns the servo into a high torque, low rpm motor. The speed of the servos rotation is controlled with Pulse Width Modulation. Required hardware: GWS Servo Phillips screwdriver utility knife Doc: 514-004 page 1 of 2 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. GWS Servo 360 Modification GWS Servo 360 Modification Step 2: Remove the four screws at the top Step 5: Remove key from drive gear with a corners of the servo. utility knife. Step 3: Remove top of case to expose gears. Step 4: Remove gears to expose sensor bracket. Step 6: Remove sensor bracket, taking care to leave the sensor at the angle pictured. The servo modification is now complete. www.digilentinc.com page 2 of 2 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.