YASKAWA yasnac lx3 - Page 23

(3) Write these data in the memory, before start-
ing to operate the machine under automatic
co; trol. -
For the writing procedure, refer
to 4.3.5, “ Displaying and Writing Tool Offset
Values .“
For writing into Tool Coordinate
Memory, follow the procedure described in
6.2.3, “ Work Measurement Value Direct Input *.”
2.6.3
TOOL POSITION OFFSETS
When the tool offset number is specified, the off-
set value corresponding to the tool offset number
is added algebraically to the command value in
the program and the tool is moved to the offset
position.
Therefore, the difference between the
coordinate values of the programmed tool tip and
the actual tool tip must be stored into tool offset
memory in advance as the offset value.
When the coordinate value of the actual tool tip
has changed due to tool wear or some other rea-
sons, the tool position offset values should be
set again.
Thus, the programmed machining is
attained without correcting the program.
(1) Range of tool position offset value
The programmable range of tool offset value
is shown below.
Inch
Metric
input I o- f9999.999rnnl
out put
,
Inch input
I
O–
fE@3.&307in.
(2) Sign of tool position offset values
store the tool position offset values in the
Offset Memory.
The offset value is the de-
viation from the tool tip position of the
reference tool which is determined as zero.
+x
tiOLpO’’T’oN
I
I I
_
6“
~
I & DIAMETER)
z
I J.
+Z
P~OGnAtMMED
–x
Fig. 2.5
(3)
Description of tool position offset motion
As mentioned above, when the tool specified
by the address T and 4 digits is moved, the
offset value corresponding to the tool offset
number is added to the command value in the
program algebraically and the tool tip is
moved to the offset position.
When there is no move command in the block,
the tool moves only by the offset value.
Once, the tool offset number is designated,
the tool moves always to the offset position
until another number is designated. When
the other offset number is designated or
the offset value is changed, the offset value
is compensated for by the amount of the
difference between the old and new offset
values.
OFFSET VALUE
I
T101
T
(+6X1, + 6z~)
T115
T
(+ 6X2, + 6Z2)
+x
{3
OFFSET MOTION
,,1+
+-
8Z2:
-—
1
COMPLETION OF @
+
L!x~
.-
-8KL
2
(X,z)
7 L?z.
EXAMPLE
‘Tlol ; . . . . . . . . . . ...+...”..
a
GO1 X.. . Z.. .
F(E) . . . ; .
T115 ; . . . . . . . . . . . . . .
(4) Move speed with tool offset
. . . . . .
a
. . . . .
B
( Block of the
offset motion)
The move speed of tool offset is determined
by the feedrate command that is effective in
the block.
Therefore, the feedrate command
(GOO or GO1 F
..) should be issued before
or in the block containing the tool offset
number.
15