Abstract: A method of calibration of a mathematical model for the compensation of errors due to dynamic deformation of a measuring machine equipped with a mobile unit able to move a stylus probe in un measuring volume, wherein the model provides, in response to at least one input quantity correlated with a control signal of said drive means, a plurality of output quantities comprising at least one component of the measurement error introduced by the deformation and at least one quantity detected by a laser sensor and correlated with the deformation. In the calibration step, the mobile unit is subjected to a movement cycle constituted by small-amplitude oscillations of variable frequency, following the law of sinusoidal motion, keeping the tip of the probe blocked; during the movement cycle, the input and output quantities are sampled and supplied to an algorithm for model identification.

Abstract: 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.

Abstract: A method of calibration of a mathematical model for the compensation of errors due to dynamic deformation of a measuring machine equipped with a mobile unit able to move a stylus probe in un measuring volume, wherein the model provides, in response to at least one input quantity correlated with a control signal of said drive means, a plurality of output quantities comprising at least one component of the measurement error introduced by the deformation and at least one quantity detected by a laser sensor and correlated with the deformation. In the calibration step, the mobile unit is subjected to a movement cycle constituted by small-amplitude oscillations of variable frequency, following the law of sinusoidal motion, keeping the tip of the probe blocked; during the movement cycle, the input and output quantities are sampled and supplied to an algorithm for model identification.

Abstract: A measuring machine comprising a measuring column, which can move vertically with respect to a carriage, and a device for balancing the weight of the column, which is provided with a pneumatic cylinder having its liner fixed to the column and the stem constrained to a supporting structure, carried by the carriage via an elastic-suspension assembly that enables the stem to follow the liner in the case of adhesion and to return into a position of equilibrium when the elastic reaction of the elastic-suspension assembly overcomes the force of friction between the piston and the liner; stick-slip phenomena are thus neutralized.

Abstract: A measuring machine comprising a mobile unit provided with a plurality of members mobile along co-ordinate axes for moving a measurement sensor in a measurement volume, in which a laser sensor is associated to a mobile member and supplies values correlated with the dynamic deformation of the mobile unit; said values are processed for compensating for the measurement errors of the machine following upon the dynamic deformations.

Abstract: A method for determining dynamic errors in a measuring machine that gives the position of a mobile element of the machine in a working space with respect to a reference system, comprising: a calibration step, defined in which is at least one input-output model, which describes the dynamic behaviour of at least part of the measuring machine; said input-output model yields, in response to at least one input quantity u, a plurality of output quantities y, which comprise, among other things, the position error introduced in the measurement of position by the elastic deformations of parts of the machine that undergo dynamic deformation; a step of definition of an estimator filter that yields, in response to measured values of input quantities u and, in response to measured values of a subset of the output quantities y, an estimate of the position error; the filter is obtained by means of an analytical method based upon the input-output model; and a step of continuous real-time reconstruction of the error, in which

Abstract: A measuring machine comprising a measuring column, which can move vertically with respect to a carriage, and a device for balancing the weight of the column, which is provided with a pneumatic cylinder having its liner fixed to the column and the stem constrained to a supporting structure, carried by the carriage via an elastic-suspension assembly that enables the stem to follow the liner in the case of adhesion and to return into a position of equilibrium when the elastic reaction of the elastic-suspension assembly overcomes the force of friction between the piston and the liner; stick-slip phenomena are thus neutralized.