
B–62444E–1/04
1. MACHINING PROGRAMS FOR
2–AXES (X AND Z AXIS) LATHES
TYPES OF MACHINING
PROGRAMS
267
(End point)
(Start point)
(X, Z)
(I, K)
R
iv) When the X coordinate (I) and Z coordinate (K) of an arc
center, and the central angle (J) are entered
An arc having the specified central angle is determined.
(End point)
(Start point)
(I, K)
J
NOTE
3 If the distance (radius) between the start point and arc
center differs from the distance (radius) between the end
point and arc center, the figure displayed on the program
screen will differ from the workpiece outline, and machining
will not be performed correctly.
v) When an arc radius (R) is entered
When contact point determination and a horizontal line
with an X coordinate entered are specified immediately
after, an arc can be uniquely determined.
However, there are two possible contact points, such that
one contact point must be selected by pressing
[TANGNT 1] or [TANGNT 2].
R
Contact point
(X, Z)
(b) When the immediately preceding block is not pending, and
contact point determination is specified