Method for the optimized movement coordination of measuring machines or machine tools having redundant translatory axes

Abstract

A method for the optimized movement coordination of measuring machines or machine tools having redundant translatory axes, the respectively longer partial axes enabling a relatively low-acceleration partial movement over a relatively large measuring or machining space and the respectively shorter partial axes substantially carrying out the movement components of an overall movement at a substantially overall constant measuring or machining speed, characterized in that the highest possible and constant movement speed of a measuring device or a tool compared to the item to be measured or machined (Vmax) is determined in that first a simulation of the machining path is performed using a reference speed (Vref), and the ratio of the maximum deflection (Sz_ref_max) to the maximum deflectability (Sz) determined from said simulation is used in conjunction with Vref in order to determine Vmax.

Description

technical field [0001] In the development of measuring machines and machine tools, redundant, translationally acting axes are increasingly being used, i.e. axes which are constructed on top of each other or interact in a parallel relative movement in space, where , one or more additional axes with a relatively short range of motion are arranged on or relative to the base shaft with a relatively long range of motion. Background technique [0002] Such axes, which can be moved redundantly in the same direction superimposedly, offer the possibility of combining a large range of movement of the base axis with a short range during the continuous movement of the measuring device or tool relative to the measured or processed object. The higher acceleration capacity of the additional shaft, which is thus lightly constructed, [0003] An example of such a design is patent EP 594699B1 (Ehlerding). In said patent it has already been proposed to use parallel-oriented, superimposed axi...

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Problems solved by technology

Also, it doesn't help when one has established a certain, largely constant trajectory velocity

[0022] In order to obtain the coarse trajectory, it is particularly advantageous to recommend the use of spline curves there, but this leads to the following disadvantages: the thickening according to the invention of the initial profile can no longer be followed by the method described in various ways. because the simplified distance comparison with the same number of support points is not possible, at least in the described method, at the corners as end points of the spline, so such a method is not suitable for most conceivable applications

[0026] However, the question arises whether such an optimized trajectory profile, which is speed-independent and thus also time-independent, is at all possible

[0033] However, this method has the disadvantage that, although it can be used for all geometries, it also leads to a reduction of the maximum speed if the geometry to be driven does not require such an important motion sequence at all, as it is known in the as specified in the equation

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