
3.INTERPOLATION FUNCTION NC FUNCTION B-63942EN/02
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3.30.3 Second, Third, and Fourth Reference Position Return
The G30 command positions the tool to the 2nd, 3rd, or 4th reference
position, via the specified intermediate point. Upon completion of
positioning, the 2nd, 3rd, or 4th reference position return completion
lamp is turned on.
Before issuing the G30 command, The 2nd, 3rd, or 4th reference
position must be set in parameters with coordinates in the machine
coordinate system.
For the tool path to the intermediate point and the tool path from the
intermediate point to the reference position, a selection can be made
between nonlinear interpolation position gain and linear interpolation
positioning as in the case of G28.
Return to the 2nd, 3rd, or 4th reference position can be performed
only after the reference position has been established.
Format
G30 P2 IP_ ; 2nd reference position return (P2 can be
omitted.)
G30 P3 IP_ ; 3rd reference position return
G30 P4 IP_ ; 4th reference position return
IP_ : Specify the intermediate point in the absolute
coordinate system.
(absolute/incremental programming)
There is no need to calculate an actual travel distance
between the intermediate point and the reference
position.