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