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