96-8000 185
G CODES
June 1999
This G code is modal in that once activated, every motion of X and/or Y will cause this canned cycle to be
executed until it is canceled or another canned cycle is selected. This cycle is a high speed peck cycle where
the retract distance is set by Setting 22.
If I, J, and K are specified, a different operating mode is selected. The first pass will cut in by I, each succeed-
ing cut will be reduced by amount J, and the minimum cutting depth is K. If P is specified, the tool will pause
at the bottom of the hole after the last peck for that amount of time.
The same dwell time applies to all subsequent blocks that do not specify a dwell time. When the canned
cycle is cancelled (i.e. G00, G01, G80, RESET) the dwell time will be reset to zero. This dwell cannot be used
in the same block as an M97, M98, M99, or G65, because these codes use P for different purposes.
If K and Q are both specified, a different operating mode is selected for this canned cycle. In this mode, the
tool is returned to the R plane after a number of passes totals up to the K amount. This allows much faster
drilling than G83 but still returns to the R plane occasionally to clear chips.
I, J, K, and Q are always positive numbers.
Setting 52 also changes the way G73 works when it returns to the R plane. Most programmers set the R plane
well above the cut to ensure that the chip clear motion actually allows the chips to get out of the hole but this
causes a wasted motion when first drilling through this îš“emptyîš” space. If Setting 52 is set to the distance
required to clear chips, the R plane can be put much closer to the part being drilled. When the clear move to R
occurs, the Z will be moved above R by this setting.
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