17 Canned Cycles for Drilling
Examples of using cycle repetitions :
If a particular type of hole is to be drilled with unchanged parameters at equally spaced positions, the number of repetitions can be specified at address L. The value of L is only effective in the block, in which it has been specified.
N1 G90 G17 G0 X0 Y0 Z100 M3
N2 G91 G81 X100
Under the above instructions the control will drill 5
identical holes spaced at 100mm along axis X. The position of the first hole is X=100, Y=0. Under G91 the position of the hole has been
specified incrementally. If it had been specified as
an absolute data (G90), the operation would have been carried out five times in succession in the point of X100, Y0 coordinates.
N1 G90 G17 G16 G0 X200
N2 G81 YI60
Under the above instructions the control will drill 6 holes spaced at 60 degrees around a circle of a 200mm radius. The position of the first hole coincides with the point of X=200 Y=0 coordinates.
Fig.
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