
17.MEASUREMENT FUNCTIOM NC FUNCTIONS B-63322EN/03
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17.2 SKIPPING THE COMMANDS FOR SEVERAL AXES
Move commands can be specified for several axes at one time in a G31
block. If an external skip signal is input during such commands, the
command is canceled for all specified axes and the next block is
executed.
The position for each specified axis where a skip signal is input is set in
the macro variable for the axis(#5061 through #5080. #100151 through
#100174 for a system with more than 20 axes
#5061 1st axis coordinate value
#5062 2nd axis coordinate value
#5063 3rd axis coordinate value
:
#5080 20th axis coordinate value
17.3 MULTISTAGE SKIP (G31.1 to G31.4)
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. In a block that also specifies the dwell command
(G04), the multistage skip function is enabled.
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.
17.4 HIGH SPEED SKIP SIGNAL (G31)
The skip function operates based on a high-speed skip signal
(connected directly to the NC; not via the PMC) instead of an ordinary
skip signal. In this case, up to eight signals can be input.
Delay and error of skip signal input is 0 - 2 msec at the NC side (not
considering those at the PMC side). This high-speed skip signal input
function keeps this value to 0.1 msec or less, thus allowing high
precision measurement.