{HEAD ~ the actual position} of the mounted semiconductor chip which was detected and calculated by {TAIL ~ the second camera} after mounting deviates from the setpoint position by more than a predetermined amount 
{ HEAD ~ the actual position } of the mounted semiconductor chip which was detected and calculated by { TAIL ~ the second camera } after mounting deviates from the setpoint position by more than a predetermined amount
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH