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