
B-63323EN-1/03 13.MEASUREMENT
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13.5.3 Multi-step Skip
General
In a block specifying G31.1 to G31.4, the multi-step skip function
stores coordinates in a custom macro variable and cancels the
remaining distance that the block was supposed to be moved when a
skip signal (4 points) or high-speed skip signal (8 points) is turned on.
Also in a block specifying G04, this function skips a dwell when the
skip signal has turned on.
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.
- Feedrate
Two types of feedrate can be selected for a multistage skip, using
parameter SFN (bit 5 of No. 7200).
(a) Feedrate specified with the address F (may be specified before or
in the multistage skip block)
(b) Feedrate set for a parameter from No. 7211 to 7214
If the feedrate with the G31 command is to conform to the feedrate set
for the parameter to improve the tool position precision when the skip
signal is input, automatic acceleration/deceleration is not performed.
- Correspondence to skip signals
Parameter Nos. 7205 to 7208 can be used to specify whether the 4-point
or 8-point skip signal is used (when a high-speed skip signal is used).
Specification is not limited to one-to-one correspondence. It is
possible to specify that one skip signal correspond to two or more G
codes. Also, of parameter No. 7209 can be used to specify dwell.