Method for the optimised movement co-ordination of measuring machines or machine-tools comprising redundant axles having a translatory action

Abstract

The invention relates to a method for the optimised movement co-ordination of measuring machines or machine-tools comprising redundant axles having a translatory action, the longer partial axles enabling a relatively slowly accelerated partial movement over a relatively large measuring or machining space, and the shorter partial axles essentially carrying out the movement components of an entire movement at an essentially generally constant measuring or machining speed, said components requiring an acceleration higher than a maximum set for the respective longer partial axles. The invention is characterised in that as soon as parameters or conditions that can lead to a collision of additional axles with the borders of the movement play thereof at a desired constant speed are identified, the acceleration specification for said shorter additional axles is reduced.

Description

technical field [0001] In the development of measuring machines and machine tools, redundant, parallel-acting axes are increasingly being used, i.e. axes which are constructed on top of each other or interact with each other and can move parallel in space relative to each other, In this case, one or more additional axes with a relatively short range of motion are arranged on or relative to a 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 594 699 B1 (Ehlerding). In said patent it has already been proposed to use paralle...

AI Technical Summary

Problems solved by technology

[0043] If the maximum velocity in at least one general axis compared to the acceleration and the available acceleration path is higher than the maximum velocity that can be controlled according to the corresponding measuring machine or processing machine in all relevant conceivable trajectory situations, then for use According to the prior art, the axis-coordinated device, ie usually the corresponding CNC control, cannot take this into account optimally, which can lead to sudden speed disturbances because, for example, the tool is too close to the edge of the motion range of the additional axis

This means that either the speed of movement must be reduced, or measurement or machining errors may result due to the resulting discontinuous movement, leading to malfunctions and disturbances in operation

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