The drive mechanism of the apparatus moves {TAIL ~ the drive shaft} 22 to begin moving {HEAD ~ the cam member} 24 toward the tube 20 
The drive mechanism of the apparatus moves { TAIL ~ the drive shaft } 22 to begin moving { HEAD ~ the cam member } 24 toward the tube 20
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH