
B–62444E–1/04
1. MACHINING PROGRAMS FOR
2–AXES (X AND Z AXIS) LATHES
TYPES OF MACHINING
PROGRAMS
295
Af : Finishing start point
A
fx
= S
x
A
fz
= S
z
(2) Determining the machining start point (for a recessed outer surface)
A
0
MD
RX
U
A
l
A
n
A
f
A
0
: Virtual machining start point
This start point, indicating the 0th machining start point, is
used only for machining start point calculation.
A
0x
= S
x
+ RX + (±TR
x
or 0) Sx = Cutting start point:
X coordinate.
A
0z
= S
z
Sz = Cutting start point:
Z coordinate.
TR
x
= Tool tip : Diameter
of R radius.
S
x
indicates the coordinates of the cutting start point.
NOTE
2 The values in parentheses vary according to the virtual tool
tip position of the tool being used.
A
1
: First machining start point
A
1x
= A
0x
– d
0
(d
0
: Maximum depth of cut MD)
A
1z
= S
z
A
n
: nth machining start point
A
nx
= A
n
–
1x
– d
0
A
nz
= S
z
A
f
: Finishing start point
A
fx
= S
x
A
fz
= S
z
Also for machining the end surface, recessed end face, inner surface, and
recessed inner surface, the machining start points are determined
according to the machining areas.