Flux sensors generate signal variations corresponding to {HEAD ~ flux variations} as the forcer moves relative to the teeth of {TAIL ~ the platen} 
Flux sensors generate signal variations corresponding to { HEAD ~ flux variations } as the forcer moves relative to the teeth of { TAIL ~ the platen }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL