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2.12
TOOL OFFSET (Cont'd)
(2)
Specification of offset plane
The
plane to
which tool radius compensation
is applied is specified by
G17, G18,
or
G19. These
are G codes
in
group 02,
so that when the
power
is
turned
on,
the XY
plane
(G17)
-is
specified by
default.
Table
2.12.11 G Code of Plane
Specification
Group
Meaning
Code
XY
plane specified
ZX
plane
specified
YZ
plane specified
G 17
02
G 18
02
02
•
G 19
G17 is specified when the
power
is
turned ON.
The G code for
plane
specification
must always
be specified in
the
same block as G41
(or
G42)
or a
block
preceding
it. If the offset plane
is
switched in offset
mode,
alarm "183"
will occur. Tool radius
compensation-C
cannot
be applied
for the
plane
that includes
a
fourth axis
or
a
fifth
axis (option).
(3)
Method of
entering
the offset mode
(a)
There are
two
types
which
can be
switched
by
parameter.
pm4012
D6
=
0 Type A
pm4012 D6 = 1
:
Type
B
<I>
Type
A
:
Does
not
move if move
command is
not provided
in
G41
(G42)
command block.
If
a
move
command is
not
given in the
G41
(G42)
command
block.
no axes
move.
In other
words, offset is
not
applied
until a move
command
is
encountered. If
movement
in the offset
plane
is
not
commanded in
a
block
next
to
G41
(or
G42)
.offset
operation
is
initiated for that block
by prereading one
block ahead. For such
blocks
(with
no move
commands
given), two
continuous blocks
can
be
programmed.
If no motion in the
offset
plane is
contained in three
or
more consecutive
blocks,
the offset
operation is
aborted and
no
offset
block
is generated.
(2) Type B
: Moves
even if move
command
is
not
provided
in G41
(G42)
command block.
When G41
(G42)
is commanded,
the tool moves
to a position
offset
only by
radius value. The offset direction is
on the
normal line of
the
starting point
of the block
next to
G41
or G42,
and on the left
or right
of the
advancing
direction
according
to
G41
(G42).
When
the coordinate command is
not
provided in the block of G41
126
-
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