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(6)
Extension/contraction
quantity
<I>
The
tool position
is extended
or
contracted relative
to
the
commanded incremental
movement
quantity by one or
two
times the
specified tool
offset
amount.
G
y
1 Gun G4
7
Xijn.
I.Mn.;
U
I
n =
J
n.
I
40.
(TWOFOLD
EXTENSION
1
60.
I
COMM
AND)
3
O
ion.
END POINT
(TOOL MOVEMENT)
START POINT
Fig. 2.12.3
<!>
If that
particular
axis
was extended or
contracted in
a previous
block
and the
start
point
has
already
been
offset,
the total
movement
amount
becomes
equal
to
the
one
described
above,
but the moved
distance is from
the offset
start point.
G
'ÿ)
1 Gun G 4 7
X
(j
11
.
Din
:
Li
ld
= L'
n
.
40.
(TWOFOLD
EXTENSION)
60.
(COMMAND)
?
~1
mo.
START POINT
END KHNT
(TOOL MOVEMENT)
OFFSET AMOUNT IN
PREVIOUS BLOCK
v
Fig. 2.12.4
If the tool offset
amount
is
greater
than
movement
q
uantity in
the
program, t
he di rection
of
movement
may
be reversed
as
a
result of extension
or
contraction
applied.
In
such
a
case,
the tool
moves
in the direction
opposite
to
that of the
program.
117
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