Abstract: 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.

Abstract: A beam for a measuring machine is constituted by a plurality of extruded beam elements, which are set alongside one another and welded together so that each forms a portion of the cross section of the beam itself; the beam elements and the beam have a hollow section shaped like an equilateral triangle.

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 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.

Abstract: A coordinate measuring machine (1) comprising a base (2) provided with guides (3) parallel ? to a first axis X, a first carriage (4) mobile on the guides (3) along the axis X and provided with an upright (17), a second carriage (6) carried by the upright (17) and mobile along a second vertical axis Z, and a horizontal arm (7) carried by the second carriage (6) and mobile along a third horizontal axis Y perpendicular to the axis X; the guides (3) of the first carriage (4) are arranged underneath a top wall (12) of the base (2), which is therefore flat and treadable.

Abstract: A bed for a measuring machine constituted by a frame provided with a pair of mutually parallel beams bearing guides for the mobile unit of the machine, and a workpiece table housed between the beams; the workpiece table and the frame are constrained to one another by constraint means that decouple the deformations thereof, and the frame comprises at least one cross-member connected to respective intermediate portions of the beams.

Abstract: A co-ordinate measuring machine (1) comprising a machine bed (2) provided with guides along a first axis, and a mobile unit (4) comprising at least one main carriage (5) mobile along the guides (16a, 16b, 16c); the machine bed (2) comprises a closed perimetral metal frame (15) provided with guides (6a, 16b, 16c) and a worktable (17) housed within the frame (15); the worktable (17) and the frame (15) are constrained to one another by constraint means (35) that uncouple the deformations thereof.

Abstract: A coordinate measuring machine (1) comprising a base (2) provided with guides (3) parallel to a first axis X, a first mobile carriage (4) on the guides (3) along the axis X and provided with an upright (17), a second carriage (6) carried by the upright (17) and mobile along a second vertical axis Z, and a horizontal arm (7) carried by the second carriage (6) and axially mobile along a third horizontal axis Y perpendicular to the axis X; the first carriage (4) comprises a base (16) provided with a first portion (19, 20) coupled to the guides (3) and a second portion (18) rigidly connected to the upright (17), releasable connection means (27) for reciprocally connecting the first portion (19, 20) and the second portion (18) of the base (16), and articulated connection means (28) between the first portion (19, 20) and the second portion (18) of the base to allow the upright (17) to be tipped when the releasable connection means (27) are released.

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 method of compensating the measurement errors of a measuring machine deriving from the deformations of a machine bed of the machine caused by the load exerted by a mobile unit of the machine on the machine bed, comprising a first acquisition step in which first data regarding the conditions of resting mode of a workpiece on the machine bed are acquired, a second acquisition step in which second data regarding the deformation of the machine bed as the position of the mobile unit of the machine varies are acquired, and a third calculation step in which correction values depending upon said first and second data are calculated.

Abstract: 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.

Abstract: A method of compensating the measurement errors of a measuring machine that derive from the deformations of the machine bed caused by the load exerted by the workpiece to be measured on the machine bed, comprising a first acquisition step in which data regarding the weight of the workpiece and the modes of resting of the workpiece on the machine bed are acquired, and a second calculation step in which correction values depending upon said data are calculated.

Abstract: A coordinate measuring machine comprising a base provided with guides parallel to a first X axis, a first carriage mobile on the guides along the X axis and provided with an upright, a second carriage carried by the upright and mobile along a second vertical Z axis, and a horizontal-arm carried by the second carriage and axially mobile along a third horizontal Y axis perpendicular to the X axis; a counterweight, fastened to the second carriage by means of a belt, is mobile along the Z axis within the upright and is provided with wheels in contact with side walls of the upright.

Abstract: A beam for a measuring machine is constituted by a plurality of extruded beam elements, which are set alongside one another and welded together so that each forms a portion of the cross section of the beam itself; the beam elements and the beam have a hollow section shaped like an equilateral triangle.

Abstract: A coordinate measuring machine comprising a base provided with guides parallel to a first X axis, a first carriage mobile on the guides along the X axis and provided with an upright, a second carriage carried by the upright and mobile along a second vertical Z axis, and a horizontal-arm carried by the second carriage and axially mobile along a third horizontal Y axis perpendicular to the X axis; a counterweight, fastened to the second carriage by means of a belt, is mobile along the Z axis within the upright and is provided with wheels in contact with side walls of the upright.