Marposs Societa' Per Azioni

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Carlo Carli

Andrea Ferrari

Franco Danielli

A system for performing dimension checkings of mechanical pieces is provided including a contact detecting probe with wireless transmission, for example through a single radiofrequency two-way communication link, to and from a base station connected to an interface unit. The probe includes a logic unit and a memory unit in which reside the values of some operation parameters, for example the transmission frequency and/or the activation mode of the probe. The values of the operation parameters can be modified in a programming phase, according to a method that foresees the wireless transmission of control signals from a manually operated control device&#x2014;to the probe, for updating of the values among the selectable values of a sequence residing in the probe, and the acquisition of the current value.

System and method for the dimension checking of mechanical pieces

A system for detecting the position and/or the dimensions of mechanical pieces () includes a checking probe () with detection devices () and a remote transmitter (), a receiver () being remotely placed from the probe to wirelessly receive, from the remote transmitter, pulse signals () indicative of the state of the probe. The receiver includes automatic control circuits that detect the presence of noises (NS) on the basis of attributes, e.g. the distribution in amplitude, of the received signal and, consequently, dynamically vary the sensitivity of the receiver, e.g. by acting on the amplification of the received signal or on a threshold (VTH) with which the received signal is compared. The pulse signals can be of optical type and the automatic control of sensitivity can be active in the presence of noise signals emitted by lamps located in the environment.

System and method for checking mechanical pieces, with wireless signal transmission

A system for detecting linear dimensions of mechanical workpieces includes a checking probe with detecting devices, a power supply and a remote transceiver unit. A stationary transceiver unit is located at a distance from the probe, and is adapted for wireless receiving and transmitting to the remote transceiver unit signals, for example, coded optical signals. The stationary unit transmits activation and/or deactivation signals to the probe for controlling the full power supply of the probe circuits, and/or the return to a &ldquo;stand-by&rdquo; power state. The remote transceiver unit includes devices adapted for achieving an automatic sensitivity control and other attenuation devices for preventing unwanted consumption of the probe battery energy due to noise signals. Such noise signals could come from fluorescent lamps, for example, causing improper activation and deactivation of the probe circuits.

System for detecting linear dimensions of mechanical workpieces, with wireless signal transmission units

A head for the linear dimension checking of pieces in machine tools or measuring machines with a support structure ( ), a movable arm-set ( ) including an arm ( ) carrying a feeler ( ) for contacting the piece ( ) to be checked, a spring ( ) arranged between the support structure and the movable arm-set, a first annular surface ( ) fixed to the support structure, a second annular surface ( ) fixed to the movable arm-set and urged by the spring into contact with the first annular surface and an electric detecting device. The detecting device includes a ring ( ) made of electrically resistive material that defines the first annular surface and another ring ( ) made of electrically resistive material that defines the second annular surface, a circuit ( ) for applying a difference of potential across two points ( ) of the first ring and another circuit ( ) for detecting the difference of potential across two points ( ) of the other ring.

Head for the linear dimension checking

Head for checking linear dimensions of parts in machine tools or measuring machines, with a casing, a movable arm-set including an arm carrying a feeler for contacting the part to be checked, a biasing device arranged between the casing and the movable arm-set, a detecting device for providing a signal depending on the position of the movable arm-set, and two constraining systems&mdash;between the casing and the movable arm-set&mdash;both totally with force closure under the action of the biasing device, that eliminate, in a univocal way, the six degrees of freedom of the movable arm-set, one of the two constraining systems featuring a structure with rotational symmetry.

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Ferrara, Italy

Carlo Carli