Next, a controller receives a signal that indicates the actual temperature of {TAIL ~ the heating element} along with an indication of {HEAD ~ the desired temperature} 
Next , a controller receives a signal that indicates the actual temperature of { TAIL ~ the heating element } along with an indication of { HEAD ~ the desired temperature }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD