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NOTE
1.
Circle
cutting
is
only performed
in the XY
plane.
If commanded for
cutting in
other
planes,
alarm "361" results.
2. The speed in the
high-speed
feed interval is
set
by
parameter
#2862.
Override
can
be. applied
to
the
speed in
the
high-speed
feed interval.
However, if the dry
run
switch is
ON,
the speed is matched with the dry
run speed.
3.
In circle cutting
(G12, G13),
the tool radius is
compensated for
irrespective of G41 or G42
(tool offset)
specification.
G12 and G13
must
be commanded in the G40
(tool
radius
compensation
cancel)
mode. If commanded in
any
other
mode, alarm
"182" results.
4. Although
movements
in "X
+
"
direction
are explained here, movements
in "X—" direction
(symmetrical
to Y-axis)
can
also be made by
changing
the
signs
of
I, J, K, and
D accordingly. In the
example
in Fig.
2.13.24, all
I, R,
and
(D)
are negative. Note however
that
cutting
in the direction
toward
Y-axis is
impossible.
5.
I, J, K, R,
Q, and L in circle
cutting are
effective
in one block
only.
Although
J
and L
can
be omitted, "I"
must
always
be commanded. If
all
are omitted,
alarm "362" results.
I
6. Radius I of finished circle and high-speed feed interval R
are subject
to
the
follwing limits (if
the limits
are
exceeded, the
tool is
not
fed
at
high
speed):
I
R -d |
<
I
I -d
I
Also,
if the
signs
of R
-
d and I
-
d
are different,
high-speed feed is
not
executed.
7. When
commanding
G12 and
G13,
be
sure
to
command tool
radius
compensation number D. If D is omitted,
the tool is moved in
the follow¬
ing
way
depending on
the
setting
of the
parameter
pm4010.
pm4010 D1
—
0
:
Offset is applied
with previously specified D number.
D1 = 1
:
Offset is
not
applied.
-
209
-
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