A determination section detects a position at which {HEAD ~ a punch} attached to the ram contacts {TAIL ~ an upper surface} of a workpiece, based upon a change in the detected pressure 
contacts
A determination section detects a position at which { HEAD ~ a punch } attached to the ram contacts { TAIL ~ an upper surface } of a workpiece , based upon a change in the detected pressure
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH