The servo amplifier 188 also receives a signal on line 192 from a change detector 194 which will initially be at {HEAD ~ the 3 volt level}, {TAIL ~ i.e. the signal level} representing the desired workpiece dimension 
The servo amplifier 188 also receives a signal on line 192 from a change detector 194 which will initially be at { HEAD ~ the 3 volt level } , { TAIL ~ i.e. the signal level } representing the desired workpiece dimension
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH