| 摘要 |
A control circuit determines two curved formations so that two straight-line passages or segments are joined to one another. The two passages or segments are arranged at an appropriate angle to one another, and as parts of specific lines (1,12) are defined b coordinates for four points (P1,P2,P3,P4). At two points (P2,P3) there is no curvature, since the curve formation used cannot have a zero curve at more than one point, thus ensuring continuity of movement of a tool along its prescribed path. Starting from two positions (P5,P6), a bisector (13) cuts the lines from two other points at right-angles between two segments. Thus, the segment on the retardation side is extended until it meets an extension of a foot formation on the forward side in order to find a line-symetrical point around the bisector. |
