YASKAWA yasnac i80m Instruction Manual page 164

2.12
TOOL OFFSET
(Cont'd)
Dummy blocks do
not
involve actual
movement,
and only
give the
necessary
data for the calculation of tool radius compensation.
In the
above example, the same command as the first block (N020) of
movement
in the XY plane that is restarted after
Z-axis
movement
is
commanded
by
using I and J as dummy commands. I, J.
or
K
are
used for the addresses of
this dummy
command, and correspond
to
X. Y, and Z
axes.
Use them
according
to
plane specifications.
I: Dummy for
X-axis command
J:
Dummy
for Y-axis command
K:
Dummy
for Z-axis command
.
To be commanded with incremental values.
If N020 X
......
Y
. . . . . .
in the above example is
an
absolute specification, the
command
must
be made after converting it
to
an equivalent incremental
value.
If a dummy block is
to
be created for circular interpolation, create it
as
follows:
Example of Programming
N050 G10 X
Y—
••
:
|
N051 G10 I
(b) J
(—a) ;
- Dummy
block
]
N052
Z
N052
Z- Z-axis
;
N059
Z-
;
N060 G03 X
......
Y
. . . . . .
I (a) J (b);
-
Circular
_
interpolation
N061 GUI X
. . . . . .
Y :
i !
CENTER
I
I
I
N052
| N
059
N050
NISO
\
N05I
:
DUMMY BLOCK
(LINEAR)
b
X
Fig.
2.12.40
Dummy Block Insertion
-
140
-