A system 10 wherein the toothed platen for {HEAD ~ the forcer} is a toothed platen for the magnetic structure, there being no independent toothed platen or {TAIL ~ scale} for the magnetic structure 
A system 10 wherein the toothed platen for { HEAD ~ the forcer } is a toothed platen for the magnetic structure , there being no independent toothed platen or { TAIL ~ scale } for the magnetic structure
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH