
B-63783EN-1/01 6.INTERPOLATION FUNCTION
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6.8 INVOLUTE INTERPOLATION
General
An involute curve can be machined using involute interpolation. Cutter
compensation C can also be used. The use of involute interpolation
eliminates the need to approximate an involute curve with very small
straight lines or arcs. This means that pulse distribution in high-speed
operation based on small blocks is not discontinued, thus enabling
smooth high-speed operation. Moreover, a machining tape can be
created more easily, plus it can be made shorter.
The function for automatic velocity control during involute interpolation
automatically applies either of the following two overrides to the
programmed speed during involute interpolation. With this function, a
surface can be cut with high precision:
-
Override in cutter compensation mode
-
Override in the vicinity of a base circle
Parameter
2510 Involute interpolation allowable error limit
[Input type] Parameter input
[Data type] Real
[Unit of data] mm, inch (input unit)
[Minimum unit of data] Depend on the increment system of the reference axis
[Valid data range] 0 or positive 9 digit of minimum unit of data (refer to the standard
parameter setting table (B))
(When the increment system is IS-B, 0.0 - +999999.999)
Specify the limit value allowed as a shift between the involute curve
passing through the start point and the involute curve passing through
the end point.
A negative value is compared as its absolute value.