
6. INTERPOLATION FUNCTION
B–63503EN–1/01
224
Helical interpolation which moved helically is enabled by specifying up
to two other axes which move synchronously with the circular
interpolation by circular commands.
The command method is to simply add one or two move command axes
which is not circular interpolation axes. An F command specifies a
feedrate along a circular arc. Therefore, the feedrate of the linear axis is
as follows:
F ×
Length of linear axis
Length of circular arc
Determine the feedrate so that the linear axis feedrate does not exceed any
of the various limit values.
Z
X
Y
Tool path
The feedrate along the circumference of two cir-
cular interpolated axes is the specified feedrate.
#7
1404
#6 #5 #4 #3 #2 #1 #0
HFC
HFC The feedrate for helical interpolation is:
0 : Clamped so that the feedrates along an arc and linear axis do not
exceed the maximum cutting feedrate specified by parameter.
1 : Clamped so that the composite feedrate along an arc and linear axis
does not exceed the maximum cutting feedrate specified by
parameter.
When HFC is 1, and two linear axes exist, the combined feedrate for
the four axes (two axes (arc) + two axes (straight line)) is clamped so
that it does not exceed the maximum cutting feedrate.
6.6
HELICAL
INTERPOLATION
General
Parameter