
B-63944EN-1/02 PROGRAMMING 6.MEMORY OPERATION BY Series 15 FORMAT
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Explanation
- Operations
This cycle performs threading so that the length of the lead only
between C and D is made as specified in the F code. In other
sections, the tool moves in rapid traverse.
The time constant for acceleration/deceleration after interpolation and
FL feedrate for thread chamfering and the feedrate for retraction after
chamfering are the same as for thread chamfering with canned cycle.
CAUTION
Notes on threading are the same as those on G32
threading. For feed hold in a threading cycle,
however, see "Feed hold in a threading cycle"
described below.
- Cutting method
There are four cutting methods.
Tool tip
k
∆
d
1st
3rd
2nd
nth
a
B
One-edge thread cutting with constant cutting
amount(P1)
a
Tool ti
Both-edge zigzag thread cutting with constant
cutting amount (P2)
d (finishing allowance)
√
2
⋅∆
d / 2
d (finishing allowance)
k
1st
2nd
3rd
4th
5th
6th
∆
d
√
n
Fig. 6.4.7 (d) One-edge threading with constant cutting amount, both-edge zigzag threading with constant
cutting amount (P1/2)
d
k
d (finishing allowance)
a
d
d
d
d
One-edge thread cutting with constant depth of cut
(P3)
d (finishing allowance)
a
∆
d
∆d
∆d
∆d
k
Both-edge zigzag thread cutting with constant
de
th of cut
P4
Tool tip
Tool tip
Fig. 6.4.7 (e) One-edge threading with constant depth of cut, both-edge zigzag threading with constant depth of
cut (P3/4)