However, in order to make use of the accurate position signals provided by the timing disc 51, it is necessary to compensate for manufacturing tolerances present in the web advancing mechanism and in {HEAD ~ the positioning} of {TAIL ~ the print head} 66 
of
However , in order to make use of the accurate position signals provided by the timing disc 51 , it is necessary to compensate for manufacturing tolerances present in the web advancing mechanism and in { HEAD ~ the positioning } of { TAIL ~ the print head } 66
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH