Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 4.INTERPOLATION FUNCIONS
- 87 -
Example
Fig.4.11 (e) Constant Helix Machining for Producing a Tapered Figure
Relational expressions
)0(
)tan(
)tan(
)1()tan(
2
)( Z
l
B
k
eIU
r
Z +×××=
θ
θ
(3)
U
l
k
eIU
r
X +×××=
)tan(
1
)1()tan(
2
)(
θ
θ
(4)
π
θ
θ
ω
2
360)1()( ××=A
where
)tan(
)tan(
I
J
K =
X (θ), Z (θ), A (θ) : Absolute value on the X-axis, Z-axis, and A-axis
from the origin
r : Left end diameter
U : Excess length
I : Taper angle
B : Groove bottom taper angle
J : Helix angle
X : Amount of movement on the linear axis
EConstant helix machining for producing a tapered figure
r
Z
B
J
I
U
X
J
X
U
X
A
r
Z
I
B
A
X
EConstant helix machining for producing a reverse tapered figure

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