YASKAWA yasnac lx3 - Page 126

2.8.26.1 Turning Cycle A (G 90) ( Cent’d )
(3) Cautions in programming G90
a.
T, S
and M functions for G90 cycle must be
specified as a rule beforehand in the preced-
ing blocks. T, S and M blocks without move
commands are effective in the effective area
of G90.
G90X. .. I.. .I. . .
F(E) . . . ;
h
x.. ;
x.. ;
x . . . T0505 M05 ;—
E ‘
GOO X...;...;
G90X. .. I.. .I. .
F(E). . ;
x.. . ;
x;
...
GOO X.. .
T0505 M05 ;
—s
x z.. . ;
. . .
I
Effective
area of
G90
Effective
area of
G90
The effective area of G91) is from the block
containing G 90 to the one before the block
in which the other G code of 01 group is
specified.
This rule also applies to the G 92
and G94 described later.
b.
In Single Block mode, the execution of G90
cycle stops after the completion of the cycle
~to@.
2.8.26.2 Threading Cycle (G 92)
(1) Straight threading cycle
G92 X( U)... Z(W). . F(E) . . . ;
!
Lead designation
The cycle ~ to ~! shown below
ecuted by this command.
+ .x
(L)
is ex–
z
START POSITION A
.- —— ---
Hap’d traverse
~
1-
.~
w
P
-&I
1%
APPRGX
$.;
(N
13
d
Rapid threading pull-out :
If “rapid threading pull-out input (CDZ )“ is on
when G92 is specified, rapid threading pull–out
is performed.
Rapid threading pull-out value (Y)
may be set to parameter
##6080, in the range of O
to 25. 5L and in increments of 0. lL , where L is
the lead of the specified thread.
Generally, it is
convenient to create and use the sequence in
which “rapid threading puil-out (CDZ ) “ is turned
on/off through the use of a given .M code.
Since G92 is modal, the cycle operation will
be continued by specifying depth of cut in
the direction of X-axis .
x(u). . ;
x(u) . . . ;
EXAMPLE:
N30 GOO x80. z76.2M. ;--M ‘.,: Rapid
threading pull-
N31 G92 x66.4 z25.4 F6. ;
out ON
N32 x65. ;
I
Threading
N33 x63.8 ;
cycle cutting
I four times
I N34 x62.64 ;
I
N35 GOO X1 OO.Z1OO. M..-M LLLL : Rapid
threading pull-
out OFF
x
II
~_..
T_-
V
-—----
‘5.
—
k
I
(
62.64‘DI.I
7Z
7(I.DIA
‘1
/
Depth of cut
I
*
F!rsl cycle
d
Second cycle
25.4
Tn)fd cycle
18rnm
07mn-
Ofi’nm
/ Fojrlh cycle
058mnl
762
I
Fig. 2.57
118
DetaIIs of Chamfering
for Thread (M 23)