This line controls {TAIL ~ the Y axis motion} and {HEAD ~ Z axis motion} of the platform and is designated the YZ movement line 
This line controls { TAIL ~ the Y axis motion } and { HEAD ~ Z axis motion } of the platform and is designated the YZ movement line
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH