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

Grinding wheel wear compensation can also be applied to circular
interpolation and helical interpolation. If the radius at the start point
differs from that at the end point, the figure does not become an arc; it
becomes a helix.
Compensation vector
Tool center path
Programmed path
Compensation center
Arc center
The compensated values are still subject to arc radius error limit
(parameter No. 3410) check.
Specifying an arc command in G40 mode causes the arc center to be
shifted by the vector length, thus causing the figure to become an arc, not
a helix.
arc center
Held vector
Tool center path
Programmed path
Grinding wheel wear compensation can also be applied to exponential
interpolation. Exponential interpolation is performed for the
compensated positions.
A compensation vector is created only on the plane (compensation plane)
corresponding to the axes specified with parameters No. 5071 and 5072
(compensation axes).
In compensation mode (including compensation vector hold mode), a
compensation vector is always created on the compensation plane
specified with parameters (No. 5071 and 5072), regardless of the plane
selected with the G17, G18, or G19 command. For example,
compensation can be performed using the YZ plane as the compensation
plane while circular interpolation is performed on the XY plane (G17).
If a move command has been specified for either compensation axis, in
compensation mode, the compensation vector component of the other
axis may be changed during compensation vector creation, thus causing
the tool to also move along that axis.
D Circular and helical
D Circular interpolation in
G40 mode
D Exponential interpolation
D Compensation plane and
plane selection using

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