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