Multiple-coordinate scanner with regulated scanning force
AssigneeWilly Hofler
InventorKarl-Heinz Hirschmann
Life of this patent
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Abstract
A multiple-coordinate scanner having regulated scanning force for scanning objects, and preferably for length- and gear-measuring machines, is disclosed. The scanner detects the scanning force via a multiple-coodinate force measuring device and uses it to regulate the scanning force, in that corresponding straight-line guides in the multiple-coordinate scanner are deflected by drive units such that the resultant measuring force corresponds to a predetermined magnitude, regardless of the direction and magnitude of the multiple-coordinate scanner deflection.
Claims7
An electronic multi-coordinate scanner having a scanning head (g) having at least one scanner (1,2) for progressively scanning a multi-dimensional article (h) from one measuring position to another measuring position on coordinate measuring machines, wherein said scanning head includes a torsionally rigid sequential arrangement of straight-line X, Y and Z guide systems (3,4,5) free of play and friction which with one another form a definite, two- or three-dimensional coordinate system, and further includes signal transducers for each X-Y-Z guide system which indicate the scanner deflection, which likewise represent a torsionally rigid coordinate system, and is provided with means for electronically controlling generation of definite measuring forces of the scanner, which comprises a multi-coordinate measuring force device (6) including signal transducers disposed between scanners (1,2) and said straight-line X, Y, Z guide systems (3,4,5);
- each of said straight-line X,Y,Z guide system includes an electronically controlled adjusting member (7) for adjusting each said guide system within its range of movement of measuring force generation;
- and each straight-line X,Y,Z guide system is provided with a travel transducer (8) for indicating a deflected position of each said guide system;
- a computer for receiving signals from said signal transducers in accordance with the individual coordinates of said scanner and comparing said signals with a predetermined set-point value and deviation between these values are converted to output signals, adjusting members 7 associated with each of said X,Y,Z guide systems for adjusting said X,Y,Z guide system in accordance with said outputs signals received from said computer, and said travel transducers produce output signals which are directed to a display device for indicating the contour of said article.
A method for measuring multi-dimensional articles by means of a multi-coordinate scanner having an adjustable measuring force, characterized in that upon each measurement step, the initially appearing resultant measuring force is ascertained as to magnitude and direction and is used to establish a predetermined, final measuring force by means of actuation of adjusting means for the scanner, such that a final resultant measuring force corresponds in magnitude and direction to a predetermined resultant measuring force;
- and that set movements of said means are emitted as scanner measured values.
Dependencies are inferred from the claim text.