Worktable with lateral and rotational movement

A grinding apparatus for grinding a surface of a workpiece comprising:

• a cam member having a surface corresponding to the surface to be ground on the workpiece.
• a cam follower engaging the surface of the cam member,
• means for supporting the workpiece and cam member for movement in accordance with the surface of said cam member, said means comprising:
• a worktable to which said workpiece may be secured, said worktable comprising first and second members that fit together in sliding relation with a rectangular extension of one member protruding into a recess in the other member, said recess being large enough to permit in said recess linear movement of said extension in two dimensions and rotational movement about an axis perpendicular to said two dimensions, and at least eight adjustment screws with all of said screws mounted substantially in a single plane in said other member so at least two screws bear on each different side of said extension, whereby the lateral and rotational position of one of said members relative to the other may be varied by adjustment of the position of said adjusting screws,
• a spindle connected to said cam member and said worktable, and
• a spindle housing means in which said spindle is mounted for rotation about an axis of said spindle,
• means for causing relative movement of the cam surface with respect to the cam follower, and
• grinding means for engaging the surface of the workpiece to be ground as the cam surface moves relative to the cam follower.