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

B-63324EN/03 PROGRAMMING 16.MEASUREMENT FUNCTIOM
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16.4 MULTISTAGE SKIP (G31.1 TO G31.4)
The multistage skip function can be used for a block specifying G31.1
to G31.4. The function stores, in the custom macro variable, the
coordinates when four normal skip signals or eight high-speed skip
signals are turned on. Then, the function skips the remaining amount of
movement. In a block specifying a dwell command (G04), the function
skips the dwell when the skip signal is turned on.
In a block specifying G31.1 to G31.4, the multistage skip function is
enabled. The correspondence between a G code and skip signal varies
from one machine to another. So, refer to the manual provided by the
machine tool builder.
A skip signal from equipment such as a fixed-dimension size
measuring instrument can be used to skip programs being executed.
In plunge grinding, for example, a series of operations from rough
machining to spark-out can be performed automatically by applying a
skip signal each time rough machining, semi-fine machining, fine-
machining, or spark-out operation is completed.
Format
Move command
G31.1 (G31.2, G31.3, G31.4) IP_ F_ ;
IP_ : End point
F_ : Feedrate
Dwell
G04 X(,P)_ ;
X(,P)_ : Dwell time
Explanation
In a block specifying G31.1 to G31.4, the multistage skip function is
enabled. The correspondence between a G code and skip signal varies
from one machine to another. Refer to the manual provided by the
machine tool builder.
In a block that also specifies the dwell command (G04), the multistage
skip function is enabled. The skip signal that can be used with the dwell
command varies from one machine to another. So, refer to the manual
provided by the machine tool builder.
In a multistage skip block, one of the following feedrates is used
according to the setting of bit 5 (SFN) in parameter No. 7200 :
(a) Feedrate specified by F (which may be specified either
before or after a multistage skip block)
(b) Feedrate specified in one of parameter No. 7211 to No. 7214

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