The second transmission linkage has a degree of freedom with respect to a bearing support which allows shifting due to deflections of {HEAD ~ the feeler roller} mounted on {TAIL ~ the second transmission linkage} as a result of a relative movement between the control cam and the feeler roller 
The second transmission linkage has a degree of freedom with respect to a bearing support which allows shifting due to deflections of { HEAD ~ the feeler roller } mounted on { TAIL ~ the second transmission linkage } as a result of a relative movement between the control cam and the feeler roller
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 HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH