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(9)
Interference check
This function
prevents
the tool from
accidentally cutting
into material
other
than the
intended
workpiece (interference).
If there is
a
possibility
of
interference, an
alarm
may
be generated
(type
A)
or the
tool
center
path
is corrected
(type B).
Type A and
type
B
can be
selected
by a
parameter.
Pm4013 D4 = l
:
Type A
Pm4013 D4
-
0
:
Type B
l
Interference check can be
changed
to
valid/invalid
by
the
following
parameter.
Pm 4013
D6 = 0
!
With interference check
Pm 4013 D6 = 1
I
Without interference check
(a)
Interference definition
fiV
fi**
r.
y
COMMAND
T
J
N
r.v
!*>
f:. fh
n
(J.
x
COMMAND
J
f::
N
:
1!
\:i
!
/
COMMAND
Fig.
2.12.58
Interference Definition
For the above
command,
the tool radius
path
for tool radius
compensation quantity Dy
is fl
—
f2
—
f3
—
f4
—
f5
—
f6;
for
Dx,
f3
—
f4 is 180° different from the
correct
command
direction
f3'
—
f4'
in
fl7
—
f2'
—
f3'
—
f4'
—
f5'
—
f6'. This instance
is
assumed
to
be
an
interference, and an alarm is generated.
151
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