FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
B–62764EN/01
4. INTERPOLATION FUNCTIONS
63
Exponential interpolation exponentially changes the rotation of a
workpiece with respect to movement on the rotary axis. Furthermore,
exponential interpolation performs linear interpolation with respect to
another axis. This enables tapered groove machining with a constant
helix angle (constant helix taper machining). This function is best suited
for grooving and grinding tools such as end mills.
Helix angle
β
1
= β
2
= β
3
Z
β
2
β
1
β
3
A
X
X (Linear axis)
X
A (Rotary axis)
A
X__; Specifies an end point with an absolute or incremental value.
Y__; Specifies an end point with an absolute or incremental value.
Z__; Specifies an end point with an absolute or incremental value.
I__ ; Specifies angl I (from 1to 89 deg in units of 0.001deg ).
J__ ; Specifies angle J (from 1 to 89 degin units of 0.001deg).
K__; Specifies the amount to divide the linear axis for exponential
interpolation (span value). Specify a positive value.
When no value is specified, the value specified in parameter
(No. 5643) is used.
R__; Specifies constant R for exponential interpolation.
F__; Specifies the initial feedrate.
Specified in the same way as an ordinary F code. Specify a
composite feedrate including a feedrate on the rotary axis.
Q__ ; Specifies the feedrate at the end point.
The same unit used for F is used. The CNC internally performs
interpolation between the initial feedrate (F) and final feedrate
(Q), depending on the travel distance on the linear axis.
positive rotation (ω=0)
G02. 3 X__ Y__ Z__ I__ J__ K__ R__ F__ Q__ ;
Negative rotation (ω=1)
G03. 3 X__ Y__ Z__ I__ J__ K__ R__ F__ Q__ ;
4.9
EXPONENTIAL
INTERPOLATION
(G02.3, G03.3)
Format

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