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17 Canned Cycles for Drilling
157
To illustrate the foregoing, let us see the following example.
G81 X_ Y_ Z_ R_ F (the drilling cycle is executed)
X (the drilling cycle is executed)
F_ (the drilling cycle is not executed, F is
over-written)
M_ (the drilling cycle is not executed, code M
is executed)
G4 P_ (the drilling cycle is not executed, the
dwell will be re-written, but not the dwell
value of cycle variable)
I_ Q_ (the drilling cycle is not executed, the
programmed values will not be recorded as
cycle variables)
– If a function as well as a drilling cycle are programmed in one block, the function will be executed
at the end of the first operation, on completion of positioning. If L has also been
programmed in the cycle, the function will be executed in the first round only.
– In block-byQblock mode, the control will stop after each of operations 1, 3 and 10 during the
cycle.
– The STOP button is ineffective to each of operations 5, 6 and 7 of cycles G74, G84. If STOP is
depressed during those operations, the control will continue its functioning, and will not stop
before the end of operation 7.
– The feed and the spindle override will always be 100% in each of operations 5, 6 and 7 of cycles
G74, G84 regardless of the override switch setting.
– If G43, G44, G49 is programmed in a cycle interpolation, or if a new value of H is specified, the
length compensation will be taken into account in operation 3, invariably along the drilling
axis.
– Instructions G45, ... G48 will not be executed in the drilling cycle.