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2.12
TOOL OFFSET
(Cont'd)
G
4
fj
X in. Uln
;
!.J
l
u
=
"ii.
HI.
(COMMAND)
1
2«.
END
POINT'
START
POINT
I
TOOL
MOVEMENT)
Fig. 2.12.5
(7)
Although
descriptions above have been made for X and Y
axes,
G45
to
G48
can
be commanded
in
the
same way
for Z-axis,
too.
(8)
Application
to
circular
interpolation
If
I,
J,
or
K
are
commanded
in
a
G45
to
G48 block,
extension
or con¬
traction
is
performed in the
same
direction
as X, Y,
and Z. Tool radius
compention can
be
accomplished by
one
command
for
1/
4, 3,ÿ4,
or
4
"
4
circles
only.
For 1. 2 circle command,
compose
it
by using I,
.-1 circle commands.
Cvi
I
c J 4
f.
(J
(i
2
\r.ii. YOU. 1
T.
II.
1
1
111;
hi o
=
Lti.
TOOL MOVEMEN T
,
-
>'
1
EXTENSION OF Y
:
20.
PRUGRAM COMMAND
EXTENSION OF X
:
20.
B
•S
5n.
(X)
6-ÿ—0
SO.
(
I
)
START fOINT
EXTENSION OF 1
:
20.
Fig.
2.12.6 Tool
Fladius Compensation in 1/4,
3/4
or 4/4 Circle
Actually,
if offset is
applied from
the
previous block, as
shown in Fig.
2.12.7,
the circular
arc
can
be the
correct
tool radius offset.
118
-
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