Coordinate measuring method and device
First Claim
1. A method for measuring coordinates on a workpiece using a coordinate probe movably connected to a positioning platform by means of one or more actuators, the position of the probe relative to the positioning platform being measurable by probe encoders, the method involving, in any suitable order, the steps of:
- moving the positioning platform with respect to a fixed reference to a predetermined location;
controlling said actuators to move the coordinate probe relative to the positioning platform, while keeping the positioning platform immobile in the fixed reference, to sense the surface of a workpiece in a local workspace accessible to coordinate probe;
obtaining a local measurement of the workpiece by combining said measure data with probe position data provided by said probe encoders;
moving the positioning platform with respect to a fixed reference to a different location.
3 Assignments
0 Petitions
Accused Products
Abstract
A measuring method and system involving a measuring coordinate probe, which can be moved precisely, by appropriate actuators, with respect to a positioning platform (60) on which the probe is mounted; and whose position relative capable to said positioning platform (60) can be measured, by suitable encoders (780). The invention can be carried out with probes, actuators and encoders of different nature. The actuators (730) preferably allow the motion of the probe according to two or more independent degrees of freedom, so that the probe itself can be moved in a plane, or in a three-dimensional region of space, and its orientation can be chosen, within some suitable limits. The method and system of the invention provide very exact local measurement, even if the platform (60) does not deliver the very best precision.
-
Citations
14 Claims
-
1. A method for measuring coordinates on a workpiece using a coordinate probe movably connected to a positioning platform by means of one or more actuators, the position of the probe relative to the positioning platform being measurable by probe encoders, the method involving, in any suitable order, the steps of:
-
moving the positioning platform with respect to a fixed reference to a predetermined location; controlling said actuators to move the coordinate probe relative to the positioning platform, while keeping the positioning platform immobile in the fixed reference, to sense the surface of a workpiece in a local workspace accessible to coordinate probe; obtaining a local measurement of the workpiece by combining said measure data with probe position data provided by said probe encoders; moving the positioning platform with respect to a fixed reference to a different location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification