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17 Canned Cycles for Drilling
144
Fig. 17.1.5-1
– spindle re-started in direction M3
17.1.4 Canned Cycle Cancel (G80)
The code G80 will cancel the cycle state, the cycle variables will be deleted.
Z and R will assume incremental 0 value (the rest of variables will assume 0).
With coordinates programmed in block G80 but no other instruction is issued, the movement will be
carried out according to the interpolation code in effect prior to activation of the cycle (G code
group 1).
17.1.5 Drilling, Spot Boring Cycle (G81)
The variables used in the cycle are
G17 G81 X
p
__ Y
p
__ Z
p
__ R__ F__ L__
G18 G81 Z
p
__ X
p
__ Y
p
__ R__ F__ L__
G19 G81 Y
p
__ Z
p
__ X
p
__ R__ F__ L__
The operations of the cycle are
1.
rapid-traverse positioning in the selected plane
2.
-
3.
rapid-traverse movement as far as point R
4.
-
5.
drilling as far as the point Z, with feed F
6.
-
7.
with G99, retraction to point R, in rapid traverse
8.
-
9.
with G98, rapid-traverse retraction to the initial point
10.
-