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