---—— —————.
25
(5)
a.
b.
c.
3 TOOL POSITION OFFSETS (Cent’d)
EXAMPLE
G50 X.. . 2.. . ;
Off set mot ion is
GOO S.. .
M03 TO1O8 ;
made at the rapid
traverse rate.
x.. . z.. . ;
Instructions for commanding tool position
offset
Tool position offset is executed by designat-
ing the tool offset number corresponding to
the actual tool must be designated.
Tool offset starts at the block in which the
T-code is commanded. When T–code is read,
the tool selection signal ( BCD) is fed and
the tool starts to move by the offset value
corresponding to the tool offset number.
Since T code is modal, it is retained until
the other T code is designated.
EXAMPLE
GOO T0202 ; . . . The tool number N 02 is
selected. Tool offset
motion is made accord–
ing to the contents of
the tool offset number 02.
When the tool offset value must be changed,
the T–code whose tool offset number is re–
written should be commanded again.
EXAMPLE
GOO T0202 ;
GO1 X.. . Z.. . F.. . ;
GO1 T0216 ;
Tool offset number 02
is replaced with 16.
Tool offset motion is made
at the cutting feedrate ,
Note that if the tool number is changed in this
case, the tool indexing motion starts.
The angle of taper cutting can be changed
by the following procedure.
T code for change of tool offset number
should be commanded in the block together
with cuttin~ feed command .
EXAMPLE
~ GOO T0202 ;
GO1 X.. . Z.. . F.. . ;
~ GO1 U+. . . W-. . . F.. . T0216 ;
-x
DICFER~NcE ,OE ~~L OFFSET l/AL~JE 3ET’,vEEN
I
T0216 AhD T 0202
T
/
MOVEMEN” OF COMMAND ~,
,.L ‘
, UOVEMENT wITHO IIT CCIMMAN17 T07. R Ih <
-~1 ~- ‘- ‘-” - ‘-
–;y
“-=.
STARTING POINT (BEFOQE THE
~
.Z
EXECUTION OF COMMAND ~,,
When the T command and the move command
are issued in the same block, the tool nose
moves to the offset position.
Therefore, in
the above case,
the taper angle is corrected
by the difference of the offset value between
T0202 and T0216.
d . When the tool position offset is required to
cancel, the T code with the tool offset num-
ber O or 00 (T
❑ ~ 00) must be commanded.
The tool Dosition offset is instantaneously
cancelled~
EXAMPLE
GOO T0202
GO1 X.. . Z.. . F.. . ;
GO1 U+. . . W-. . . F.. .
@ GOO X.. . Z.. . T0200
ro216 ;
. . . .
The offset
motion is
cancelled.
Tool moves
according to
the position
specified by
Xand Z.
The block ~ of EXAMPLE can be divided
into two blocks.
G(IO X.. . Z.. . ;
T0200 ; . . . . . Only cancel motion is made
at rapid traverse rate.
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