YASKAWA YASNAC 3000G

2.14.7
HELICAL
CUTTING
(G14,
G15)+
Helical
cutting
is
limited
to
circular
motion
on
the
XY
plane
and linear
motion
in
the
Z
direction.
.
The
direction
of
movement
on
the
Z
axis
is
deter-
‘
mined
by
the
sign
of
K.
When
K
is
positive,
the
tool
moves
in
the
direction
of
positive
Z
axis.
I
designates
the.radius
of
the
cutting
circle
from
the
center
of
the
helical
circle.
The
start
point
is
limited
to
the
point
on
the
X
axis
to
the
right
or
the
left
of
the
center
of
the
helical
circle.
Start
cannot
be
made
on
Y
axis.
L
represents
the
number
of
helixes,
and
only
an
without
sign
should
be,
programmed.
If
the desired
number
of
turns
of
the
helix
is
not
an
integer,
make
an
adjustment
by
shifting
the
Z
axis
position
of
the
start
point.
\
In
the
section
designated
by
Ft,
the
tool
moves
at
rapid
traverse
regardless
of
the
F
code.
This
is
for
reducing
the
air
cut
time,
and the
speed
is
set
by
a
parameter
according
to
the
type
of
machine.
(Parameter
No.
"66")
When
R"
is
zero
or
is
omitted,
the
tool
moves
over
the
entire
path
in
cutting
feedrate
designated
by
F
code.
The
feedrate
designated
by
an
F
code
re¬
presents
the
speed
of
circular
arc
compensation
on
the
XY
plane,
and the
tool
moves
in
synchro¬
nization
with it
in
the
direction.
in
helical
cutting
(G14,
G15),
tool
radius
compen¬
sation
is made
regardless
of
designation
of
G41,
G42.
Program
G14,
G15
in
G40
(tool
radius
com¬
pensation
cancel)
mode.
There
is
the
following
restriction
between
spiral
lead
K
and
rapid
traverse
section
R.
Exceeding
of
the
restriction
causes
an
input
error.
G14
I-
•
K-
•
L-
• •
R.
• •
D-
•
•
F-
.
.
(G
15)
This command
executes
circular
interpolation
in
the
XY
plane
and linear
interpolation
in
the
Z
di¬
rection
simultaneously.
G14
Clockwise
(CW)
Counterclockwise
(CCW)
Radius
of
circle
(incremental
value
with
sign)
Lead
of
spiral
(incremental
value
with
sign)
'
Number
of
spirals
(integer)
Rapid
traverse
section
(incremental
value
with
sign)
Tool
radius
compensation
No.
Cutting
feedrate
K
=
6.8
1
1
-
(D)j
G
15
I
Kr
L:
R:
D:
F:
where
Z
END
POINT
K
L2
(A
case
with
2
helixes)
Z
K
|Rl
<
I
K
|
START
POINT
An
error
also
occurs
when the
signs
of
R
and
K
are
different.
In
the
block
containing
G14
(G15),
the
tool
radius
compensation
number
(D)
must
be
programmed.
If
omitted,
D
or
H
codeprogrammed
in
the
pre¬
vious
block
becomes
effective.
ARC
START
POINT
CENTER
’Z
/
J
(102
I-(D)
(D
x
I
Fig.
2.
14.
7.
1
-
32
-