The Measurement of Positioning Accuracy for Roller Gear Cam Mechanisms

        Globoidal cams have been widely applied in industry and the accuracy of globoidal cams is very important. When the rotary speed of input increases, residual vibrations caused by inertial may influence the positioning accuracy of globoidal cams. Therefore, an experimental apparatus is built to measure the actual residual vibrations of globoidal cam mechanisms. Investigations of the influences of various motion curves (MS curves、symmetric RB curves and unsymmetrical RB curves), cam blank size, and a torque compensation mechanism on the positioning accuracy at different input speeds are performed to find the ways to improve the positioning accuracy of globoidal cam mechanisms.