| 摘要 |
<p>A scribing device is disclosed for cutting an end of an elongate workpiece to match its cross section, so that neat right angled joints can be made from two lengths of the same cross section. A sample (90) having the shape is positioned on a support platform (20) and an array of sliding plates (65) of a comb (60) are pushed against the shaped surface to form a cam surface of matching shape. The plates are then locked in position to preserve the cam surface and the comb is then inverted so that the cam surface faces a tool support (80) on which a routing tool or the like can move forwards, backwards and sideways to scribe the end of a workpiece secured on a workpiece support 10 under the platform 20, a cam follower pin (84) following the cam surface formed by the ends of the plates (65) to guide the cut.</p> |
