Hexagon Metrology Gmbh

Istituto Nazionale Di Ricerca Metrologica (i.n.ri.m.)

Politecnico De Torino

Cerrato S.r.l.

Istituto Nazionale Di Ricerca Metrologica

Michele Verdi

Alberto Tarizzo

Domenico Russo

Lorenzo Merlo

Giampiero Guasco

Emanuele Ricci

Alessandro Balsamo

Aurelio Soma

Nicola Bosso

Giorgio De Pasquale

Dario Cerrato

Michele Cerrato

Cesare Cassani

A mobile unit () is described for measuring running paths for handling systems, in particular bridge cranes, sliding on a route (), comprising at least one first measuring device () which constitutes a space reference of the mobile unit () with respect to at least one fixed measuring unit () comprising second measuring device (), the first measuring device () being connected to the mobile unit () by interposing at least one handling device adapted to synchronize measuring operations between the first measuring device () and the second measuring device () of the fixed measuring unit (). A system for measuring () running paths for handling systems through such mobile unit () and a process for measuring through such system () are further described.

Mobile unit for measuring running paths for handling device, system and process for measuring through such mobile unit

A measuring machine includes a mobile unit to move a measurement sensor in a measurement volume. The mobile unit includes at least one member mobile along an axis under the thrust of driving means and being subjected to dynamic deformations. A laser sensor is provided with a laser emitter fixed to a first portion of the mobile member and a target fixed to a second portion of the mobile member and designed to receive a laser beam generated by the emitter. Means are provided for compensating for measurement errors of the machine resulting from the dynamic deformations of the mobile unit and in response to displacement of a point of incidence of the laser beam on the target with respect to a reference position in undeformed conditions, the displacement of the point resulting from the relative displacement of the first and second portions of the mobile member.

Compensation of measurement errors due to dynamic deformations in a coordinate measuring machine

Measuring machine

A co-ordinate measuring machine comprising a block of concrete with function of foundation or machine bed, and a plurality of linear deformation sensors embedded in the block or applied thereto and configured for detecting the deformations of the block itself for compensating the measuring errors of the machine resulting from said deformations.

Measuring machine provided with a block of concrete having the function of foundation or machine bed, and method for compensating the measuring errors due to deformations of the block

A co-ordinate measuring machine comprising a bed provided with a horizontal measuring surface, a unit that is mobile along guides carried by the bed itself, an annular structure extending along a perimetral area of the bed and constrained thereto by statically determinate means of constraint, and a plurality of displacement sensors set between the annular structure and one between the bed and the mobile unit for detecting relative displacements with respect to an initial reference condition.

Co-ordinate measuring machine

Disclosed is a method of determining geometric errors in a machine tool or measuring machine having a mobile unit for moving a target within a measuring volume. The method includes the steps of generating a succession of laser beams in different directions by means of an interferometer, and, for each direction, moving the target into a number of points along the beam; measuring, by means of the interferometer, the abscissa of each of the points from an origin located along the direction of the beam; acquiring the coordinates of each of the points by means of the machine; and determining error parameters of the machine on the basis of the abscissas measured by the interferometer, and the coordinates of the points acquired by the machine.

Method of determining geometric errors in a machine tool or measuring machine

A method of aligning arm reference systems of a multiple-arm measuring machine having at least two measuring units, each having a movable arm; the method including the steps of aligning the reference systems of the measuring units when setting up the machine, and periodically updating alignment of the reference systems by detecting, by means of one measuring unit, a reference member carried by another measuring unit and moved successively by the other measuring unit into a number of positions at an intersection of the measuring volumes of the two measuring units.

Method of aligning arm reference system of a multiple-arm measurement machine

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Rivoli, Italy

Michele Verdi