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