
6. Interpolation Functions
6.6 Helical Interpolation
53
The arc plane element speed designation and normal speed designation can be selected with the
parameter.
#1235 set07/bit0
Meaning
1
Arc plane element speed designation is selected.
0
Normal speed designation is selected.
Normal speed designation
Z axis
P
1
time
First time
End point
Y axis
X axis
Start point
Y
X
θ
θ
e
θ
s
Z
1
l
Second time
(1) This command should be issued with a linear axis (multiple axes can be commanded) that
does not contain a circular axis in the circular interpolation command combined.
(2) For feedrate F, command the X, Y Z axis composite element directions speed.
(3) Pitch l is obtained with the following expression.
l
=
Z1
(2
π
•
P1 +
θ
) / 2
π
θ
=
θ
E -
θ
s = tan
-1
ye
xe
- tan
-1
ys
xs
(0
≤
θ
< 2
π
)
Where xs, ys are the start point coordinates from the arc center
xe, ye are the end point coordinates from the arc center
(4) If pitch No. is 0, address P can be omitted.
(Note)
The pitch No. P command range is 0 to 9999.
The pitch No. designation (P command) cannot be made with the R-specified arc.
(5) Plane
selection
The helical interpolation arc plane selection is determined with the plane selection mode and
axis address as for the circular interpolation. For the helical interpolation command, the plane
where circular interpolation is executed is commanded with the plane selection G code (G17,
G18, G19), and the 2 circular interpolation axes and linear interpolation axis (axis that
intersects with circular plane) 3 axis addresses are commanded.
XY plane circular, Z axis linear
Command the X, Y and Z axis addresses in the G02 (G03) and G17 (plane selection
G code) mode.
ZX plane circular, Y axis linear
Command the X, Y and Z axis addresses in the G02 (G03) and G18 (plane selection
G code) mode.
YZ plane circular, X axis linear
Command the X, Y and Z axis addresses in the G02 (G03) and G19 (plane selection
G code) mode.