Table of Contents
Advertisement
2.12.3
Tool Position Offset
(G45 to G48)
Tool
position
offset extends
or contracts a program-specified
movement
amount
by
the
contents
of tool offset value
memory,
and is used
primarily
to
correct
the tool radius of
a
square
shape. Therefore,
this function need
not
be used for equipment
provided with G40, G41,
and G42
(tool
radius
compensation-C) as options.
(1)
G codes for tool position offset
Table 2.12.8
l
Code
Group
Meaning
G-ir.
F.xtensinn
Contraction
Twofold extension
Twofold contraction
*
Cj
40
*
G47
*
G-W
*
(2)
G45
to
G48 expands
or
contracts
the
movement amount
of
an
axis
com¬
manded
in
that block
in
the direction of
movement.
Extension
or con¬
traction is only
executed
in
the block
in
which G45
to
G48 is
com¬
manded. and length of
movement
in
all other blocks
are performed
as
programmed.
Consequently,
if
an
offset
amount
from the
program
diagram by
exten¬
sion
or
contraction
is
to
be
returned
to
the
original, extension
or
contraction in the reverse direction
must
be commanded.
(3)
To
clarify the
above
operation,
create
program
commands
using
incremental
specification (G91).
Conversely, if commanded
with absolute
specification
(G90),
extension
or
contraction
may
be
performed along
the direction of
movement
for
a movement quantity (i.e.,
incremental
quantity)
from the end point
of the
previous
block
(offset not
applied)
to
the command
target
point.
(4)
When
commanding
G45
to
G48,
be
sure
to
specify the
tool
correction
No.
by
D code
simultaneously
with axis
specification. However, it
may
be
omitted if the
same
D code is used because the D code is
a
modal code.
Tool radius values
must
have been
set
in tool offset
amount memory.
115
-
Advertisement
Table of Contents
