International Journal of Engineering and Technology

The indexing tables have recently become an increasing necessity for improving the precision and accuracy of angle measurement. The indexing table employs a vee and 3 balls kinematic location system. A 6 point contact kinematic design concept of ball and vee groove was used, because the ball and vee groove system can attain good repeatability and has good rigidity. The vee plays an important role as the indexing angle and locking mechanism. Also eccentricity is an important factor as alignment between the rotation centre of the rotary table and the edge of the grinding wheel during the manufacturing process. So the concentricity between the centre of the vee plate and the centre of the rotary table is required to be as close as possible to make an accurate vee plate. The grinding technique developed for the vee plate enables the vee grooves to be machined with minimum eccentricity. To achieve manufacturing accuracy of the vee plate the grinding machine spindle had to operate for 2 hours prior to grinding in order to minimise thermal deformation