Fanuc Series 15i/150i-MA (Programming) Operators Manual

14.COMPENSATION FUNCTION PROGRAMMING B-63324EN/03
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- Circular interpolation/helical interpolation
When circular interpolation (G02/G03) is specified in grinding wheel
wear compensation mode, the radius at the start point of an arc differs
from the radius at the end point, which prevents a correct arc from
being formed, unless the compensation center and arc center match. As
a result, a spiral is formed.
Similarly, this occurs in helical interpolation.
Compensation vector
Programmed path
Tool center path
Compensation center
Arc center
Fig. 14.18 (d) Arc Interpolation in Grinding Wheel Wear Compensation
Mode
Also, for the value obtained after compensation, a check of the arc
radius error limit (parameter No. 2410) is performed.
When arc interpolation is specified in compensation vector
maintenance mode, the end position and arc center are shifted by the
amount of the compensation vector. As a result, an arc is formed
instead of a spiral.
Maintained vector
Programmed path
Tool center path
Programmed arc center
Fig. 14.18 (e) Arc Command in Compensation Vector Maintenance Mode
(G40)
- Exponential interpolation
When exponential interpolation is specified in grinding wheel wear
compensation mode, a compensation vector is created for each of the
points approximating a straight line in exponential interpolation.
- Power-up and reset
When a power-up or reset operation is performed, grinding wheel wear
compensation cancel mode is set.

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