| 摘要 |
<p>The draughting machine is perspective drawing, having a board over which a pivoting ruler set is guided in two directions at right angles to each other. It is combined with a computer, to which the ruler set is connected, so that angular and linear position data are fed into the computer. This causes the latter to generate signals which determine the angular and coordinate positions of the ruler set. The coordinates can be based on the intersection point of crossed lines at the ruler set pivot point.</p> |
