FIELD: machine building.
SUBSTANCE: machine, mainly with disc saw, comprises support surface 14 to retain workpiece and device to control machining with identification unit 24. The latter has two sensors to identify work conditions related with unforeseen behaviour of workpiece and/or operator touching work tool. Said unit 24 identifies departure of workpiece from support surface 14 proceeding from difference in distance parameters (42, 44, 46, 82, 98; 114.1 - 114.6). Note here that every sensor has field of vision facing support surface 14 while said controlled parameters correspond to distance from sensors to workpiece or operator hand.
EFFECT: higher safety.
22 cl, 20 dwg
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