Abstract: An apparatus for balancing a rotating body, in particular the grinding wheel of a grinding machine, comprises an assembly secured to the grinding wheel and rotating with it, with masses having an adjustable arrangement, electrical motors for controlling adjusting movements of the masses, and electrical circuits with a microprocessor unit. A transceiver terminal between a control unit and the rotating assembly provides a first contactless transmission channel for inductively coupling a fixed power source to the rotating parts, and a second contactless transmission channel for transmitting information in both directions. The second transmission channel may comprise optoelectronic devices.

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: 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: The invention relates to logic systems used for controlling industrial processes and consists in a monitoring apparatus for checking the regularity of the operation of a logic system, in order to increase its safeness. The apparatus comprises a source of a clock signal, a series of comparison units for comparing logic signals, a detecting device including a counter for checking the presence of the clock signal at the output of the series of comparison units, a checking system means for simulating an alarm state and consent system for making the operation of the logic system depend on the working conditions of the monitoring apparatus. The invention is particularly useful for increasing the safeness of the operation of logic systems for machine tools.

Abstract: A method for controlling and regulating the working cycles of a machine tool on a workpiece, including the steps of measuring the workpiece during the machining and programming the feed speed of the tool depending on another variable quantity, which foresees generating a signal responsive to the elastic strains suffered, during the machining, by the kinematic chain comprising the workpiece and the tool, as a consequence of the tool thrust. The signal is used for controlling the feed speed. An apparatus for controlling and regulating the working cycles of a machine tool including a measuring device for the measurement of the sizes of the workpiece being machined, a stepping motor, a digital counter, a digital analogue converter and adapter responsive to the position of the tool relative to a reference position, a differential amplifier, a program unit for programming the feed speed of the tool and a control unit for varying the feed speed.

Abstract: An apparatus for controlling a machine tool which includes a measuring head for measuring a dimension (i.e. a diameter) of a workpiece, a detector for detecting and holding the maximum dimension measured by the measuring head, a circuit for determining the mean dimension of a plurality of measurements, a circuit for determining the dispersion between the measured dimensions and the mean, and a counter for inhibiting the control operation until a predetermined minimum number of workpieces have been measured.

Abstract: Apparatus for checking the cutting capacity and controlling the dressing of a grinding wheel comprising a device to measure the sizes of the pieces being machined, a threshold unit connected to the output of the device responsive to the device, a processing group containing an integrating and memory circuit to integrate and store signals for every piece being machined, a switch associated with the integrating and memory circuit and controlled by the threshold unit, a threshold circuit the input of which is connected to the switch and the output to the processing group and a threshold device to control dressing of the grinding wheel connected to the output of the processing group. The apparatus may include a program unit to set the values of the feed speed of the wheelhead, a unit to calculate stock removal speed and a unit to compare stock removal speed with programmed speed.