Abstract: The machining of mechanical pieces in a grinding machine is controlled depending on in-process and post-process measurements of the pieces. The post-process measurement is carried out by using the same in-process measurement means, with the provision of different zero references for the two types of measurements.

Abstract: Gauge for checking linear dimensions of mechanical pieces comprising a support, two arms movable with respect to the support, two feelers respectively fixed to the arms for contacting the piece to be checked and a position transducer having two mutually movable elements respectively fixed to the movable arms. Each feeler is fixed to the relevant movable arm by screw, nut-screw coupling and between the screw and the nut-screw there is arranged a thread insert, having at least one polygonal coil, which permits adjustment of the position of the feeler, while assuring a stable adjustment.

Abstract: The machining of mechanical pieces in a grinding machine is controlled depending on in-process and post-process measurements of the pieces. The post-process measurement is carried out by using the same in-process measurement means, with the provision of different zero references for the two types of measurements.

Abstract: Two machine tools are provided with control systems for machining two different types of pieces to be matched to each other. In order to obtain small batches of relevant pieces that basically can be completely matched to one another, the control systems are independent from each other and each of them comprises post-process and in-process checking stations; the first station, besides checking the proper operation of the in-process station progressively and at short regular intervals changes its zero condition, so as to obtain machining pieces having dimensions evenly distributed within the relevant tolerance range.