DETERMINING AN OPERATING PATH OF A TOOL IN RELATION TO A THREE-DIMENSIONAL SURFACE OF A WORKPIECE

摘要

AbstractFor determining a path of movement of a tool along shoe bottom marginalportions a series of points along such path is selected and information regardingsuch points stored in the form of digitized co-ordinate axis values by computer,from which information the path can subsequently be derived. The selectedpoints are spaced by a predetermined distance (which may be the same for eachpair of adjacent points) regardless of shoe bottom contour. To this end, wheneach point is digitized, the tool and shoe bottom are relatively moved apart bythe predetermined distance along one e.g. a heightwise dimension (preferablyan axis). Thereafter in returning the tool and shoe bottom into engagementalong said one dimension and/or along a second, e.g. widthwise, dimension,movement also takes place automatically along a third, e.g. lengthwise,dimension thus to maintain the predetermined distance. Computer alsohas interpolation, grading (for size) and reversing (left/right) programmes.