The outer boundary can be used as a contour tool path or as a limit to travel by raster tool paths.
Contour boundaries near outer perimeter corners can be better defined by extending outward a contour tool path toward the corners.
Layer regions near inner voids can receive consistent filling through an improved raster tool path method.
The dither spring structure can be manufactured via electro-discharge machining (EDM) using a single continuous pass of an EDM cutting element.
On the basis of this preform (15), at least the substantial part of the fishbone-type cross-section form which is characterised by undercuts in the step flanks is milled in one tool passage by means of a profile milling cutter (21).
Sub-perimeter voids between raster bead pair turn-arounds and contour beads can be eliminated by automatically adjusting the raster tool path vertices toward the adjacent raster bead pair and/or contour bead.