In rough grinding, {HEAD ~ the servomotor} 19 and {TAIL ~ the servomotor} 27 are synchronized according to profile data PFD shown in FIG 10 
In rough grinding , { HEAD ~ the servomotor } 19 and { TAIL ~ the servomotor } 27 are synchronized according to profile data PFD shown in FIG 10
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH