VARIOUS FUNCTIONS AND
PRECAUTIONS OF Symbolic FAPT
2. CAUTIONS FOR USING
(6)If the cutting area in outer surface roughing is divided midway through
the tapered section
No check is made on the tool nose angle (minor cutting edge angle)
on the border line from the area division point to the blank figure. If
the minor cutting edge angle is smaller than the angle made by the
Z–axis and the border line, therefore, the rear surface of the tool may
interfere with the blank figure.
To avoid this interference, specify the border line for area dividing in
such a way that it will not interfere with the minor cutting edge of the
After changing the division start point from point A to point B shown
in Fig. 2.5 (a), changing the direction of dividing to R causes a check
to be made on the tool nose angle within the cutting area, so
interference with the blank figure will not occur.
However, use an inverse–process tool so that no uncut portion is left
in area C.
No check is
made on the
tool nose angle
on this line.
Direction of cutting
Fig. 2.5 (a)