The cam mechanism is mounted on a carrier assembly, on which is mounted a rotary workpiece holder for positioning {TAIL ~ a workpiece} in relation to {HEAD ~ a machining tool} 
The cam mechanism is mounted on a carrier assembly , on which is mounted a rotary workpiece holder for positioning { TAIL ~ a workpiece } in relation to { HEAD ~ a machining tool }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD