
1. MACHINING PROGRAMS FOR
2–AXES (X AND Z–AXIS) LATHES
B–63284EN/03
TYPES OF MACHINING
PROGRAMS
302
In pattern repeating, cutting is repeated while the cutting pattern is shifted
step by step to cut the specified final figure.
Machining example) Pattern repeating for an outer–surface edge
First trace of rough machining
Product figure
Last trace of rough machining
MD
RX/2
RZ
W
U/2
A
0
A
l
A
n
A
f
MD : Depth of initial cut (Diameter)
U : Finishing allowance (Detail data screen : diameter) along the
X–axis entered on the process data screen
W : Finishing allowance along the Z–axis entered on the process
data screen (Detail data screen)
RX : Cutting allowance (Detail data screen : diameter) along the
X–axis entered on the process data screen
RZ : Cutting allowance along the Z–axis entered on the process
data screen
(1) Determining the machining start point (outer–surface machining)
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
= Sx + Rx + (±TR
x
or 0) Sx = Cutting start point:
X coordinate.
A
0z
= Sz + Rz + (±TRz or 0) Sz = Cutting start point:
Z coordinate.
TR
x
= Tool tip : Diameter
of R radius.
TRz = Tool tip : R radius.
NOTE
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
= A
0z
– d
0z
(d
0z
= d
0
*Rz/Rx)
L
A
n
: nth machining start point
A
nx
= A
n–1x
– d
0
A
nz
= A
n–1z
– d
0z
1.2.4
Details of Pattern
Repeating