Twin template cam tracker

A cam tracker comprising a master cam having a master cam surface thereon, means supporting said master cam, a master cam follower, a drive shaft supporting said cam follower in rolling contact with said cam surface on said master cam, means rotatably supporting said drive shaft, drive means connected with said drive shaft for rotating the drive shaft and cam follower thereby moving the cam follower and cam surface in relation to each other, a control cam having a control cam surface thereon, means supporting said control cam in axially spaced, fixed relation to the master cam with the control cam surface being in radially opposed relation to the master cam surface, a control cam follower, means supporting said control cam follower in rolling contact with said control cam surface with the control cam follower being freely rotatably supported by its supporting means, said supporting means for the cam follower including a movable mounting member rotatably journaling said control cam follower, housing means, rotatably connected to said drive shaft means movably supporting said mounting member from said housing means, and spring means connected between said mounting member and said housing means to resiliently bias the mounting member in one direction to resiliently retain the control cam follower in rolling contact with the control cam surface and to resiliently bias said master cam follower in the opposite direction into rolling contact with said master cam.