YASKAWA yasnac lx3 - Page 71

2.8.22 WORK COORDINATE MULTI-SHIFT (G 50T, G 51)+
This feasure is used in combination with “5.2.3,
Measured Workpiece Value Direct Input” option.
Hence itis necessary for the programmer to be
familiarwith paragraph 5.2.3.
The purpose of this feature is to retain a
“work coordinate system” with a certain point on
the work used as absolute zero point by perform-
ing G 50T coordinate system setting at the replace–
ment position of each tool. In other words, pro-
gramming may be performed with a single coor-
dinate system throughout the entire machining.
(1)
a.
b.
—
Tool coordinate value memory (number)
It is necessary, before specifying G 50T, to
write the coordinate data for each tool to
the tool coordinate memory. For the writ-
ing procedure, see
5.2.3,“Measured Work-
piece
Value Direct Input.”
The number of available tool coordinate
memory units corresponds to the number
of tool offset memory combinations as shown
below.
Number of Tool Offset
%tilable Tool Coordinate
Memcxy Combinations
Menwy Number
c. For ease of use, write the coordinate data
for tool No. 01 in tool coordinate memory
No. 51, etc. , as shown below:
Tool Coordinate Memory
I
Tool No.
I
+Z
Ztn
I
Tn
I
TOOL SLIDE AT THE
POSITION INDICATED
Atn
BY CURRENT POSITION
DISPLAY (0, O)
(SEE NOTE 1)
Xtn
2
Zm
r -1
(< T,
+Z
Xm
% wORKPIECE
I \ :~g~~ COORDINATE SYSTEM” SET BY
TOR AT ‘“WORK MEASURED VALUE
DIRECT INPUT’OPERATION
Fig. 2.37
(2) Work coordinate system setting (G50T)
a.
G50 TZLAA
1-1--
~ Specifies tool offset number
(00 to 50)
d.
It is assumed that the tool coordinate mem-
ory contains the following coordinate data
Xtn and Ztn for each tool Tn: .
L Specifies tool coordinate
memory number
(51 to 99)
Using this command, set the coordinate
system for each of K axis and Z-axis with
the following work coordinate system setting
value:
b.
Work coordinate
system setting
value
‘[~:~n:
[
Content of
1[
Content of
programmed tool +
programmed tool
coordinate memory offset memory
1
Note :
1!unit current position value” is
the one which is shown in “POSITION
[EXTERNAL] screen of the current posi-
tion display (POS ) on CRT display.
Usually, specify
“ 00” in the tool offset
number specification field A A .
EXAMPLE :
G50 T51OO ;
L 1100,1
specifies the work
coordinate system setting
with the contents of tool
offset memory being zero.
When the above program is specified with
the tool slide at a given position (for
example, –x, –z in the unit current posi-
tion display) ,
the work coordinate system
defined by the operator is set correctly as
shown below :
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