14. FUNCTIONS TO SIMPLIFY
This cycle is used to bore a hole.
G86 (G98) G86 (G99)
G86 X_ Y_ Z_ R_ F_ K_ ;
X_ Y_: Hole position data
Z_ : The distance from point R to the bottom of the hole
R_ : The distance from the initial level to point R level
F_ : Cutting feed rate
K_ : Number of repeats
Point R level
After positioning along the X– and Y–axes, rapid traverse is performed
to point R.
Drilling is performed from point R to point Z.
When the spindle is stopped at the bottom of the hole, the tool is retracted
in rapid traverse.
Before specifying G86, use a miscellaneous function (M code) to rotate
When the G86 command and an M code are specified in the same block,
the M code is executed at the time of the first positioning operation.
The system then proceeds to the next drilling operation.
When K is used to specify the number of repeats, the M code is executed
for the first hole only; for the second and subsequent holes, the M code
is not executed.
When a tool length offset (G43, G44, or G49) is specified in the canned
cycle, the offset is applied at the time of positioning to point R.