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N'JO
NIJ'NIy
NIO
i
/
i
/
i
i
EXECUTION
OF
N 12 TON 19
\
i
i
Fig. 2.12.38
Positioning
if
there is
No Coordinate Command
in
Four or more Blocks
i
(b)
If there is
no move
command in four consecutive
blocks, the tool
is
positioned on
the end
point normal line by the
offset
quantity
in
the immediately preceding block. In such a
case,
if
movement
in the
offset
plane
cannot
be commanded in three or more consecutive
blocks for
an
unavoidable
reason
{e.g.,
third axis
escape operation)
and.
in
addition,
positioning on the normal line is undesirable, one or
more I,
J.
or
K-based
dummy
blocks
may
be inserted.
(
Example
of Programming
N00 1
GI7
Gill G
4
1 X
N002 X
Y
0
.....
F
;
Y
:
XV
PLANE
NO in
x
Y
|
NON
I
J
.....
:
.....
DUMMY BLOCK
NOI;
Z
Z AXIS
(J
SLOCKS
MIN.
I
:
:
NO! 9 Z
Y-
:
:
XY PLANE
i
N029 X
Y
Nn30 C.40 X-
\
Y
I
*
I
I
NO 1C
I
NOI 9
I
lj
MCO
MHO
J
Y
(X.
Yl
I
X
Fig.
2.12.39
Dummy
Block Insertion
-
139
-
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