When the upper surface of the workpiece is detected, a plate thickness calculation section calculates a plate thickness of the workpiece based on {HEAD ~ an upper surface position} of {TAIL ~ a die}, that is known in advance and stored in a memory 
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When the upper surface of the workpiece is detected , a plate thickness calculation section calculates a plate thickness of the workpiece based on { HEAD ~ an upper surface position } of { TAIL ~ a die } , that is known in advance and stored in a memory
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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH