3. EXECUTION OF
OPERATION BY Symbolic FAPT
After the data is entered, the system can calculate the center of the arc.
The system prompts the operator to select a desired center.
On the screen, calculated centers are automatically scaled and
indicated by graphic cursors.
The system temporarily scales the centers so that the operator can
easily select one of the centers. After the operator specifies the desired
center, the original scale is restored.
Selecting a center PC = j (³: Right, ²: Left, °: Up, ±: Down). .
The desired center is the intersection of auxiliary circle A (center (20,
0) and radius (R) 26) and the straight line of Z = 18. Since the circle
and line intersect at two points (PC1 and PC2), the operator must
specify either of them. (See the figure below.)