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17 Canned Cycles for Drilling
146
Fig. 17.1.7-1
17.1.7 Peck Drilling Cycle (G83)
The variables used in the cycle are
G17 G83 X
p
__ Y
p
__ Z
p
__ R__ Q__ E__ F__ L__
G18 G83 Z
p
__ X
p
__ Y
p
__ R__ Q__ E__ F__ L__
G19 G83 Y
p
__ Z
p
__ X
p
__ R__ Q__ E__ F__ L__
The oprations of the cycle are
1. rapid-traverse positioning in the selected plane
2. -
3. rapid-traverse movement to point R
4. -
5. drilling to the bottom point, with feed F
6. -
7. with G99, rapid-traverse retraction to point R
8. -
9. with G98, rapid-traverse retraction to the initial point
10. -
Description of drilling operation 5 is as follows:
– drilling the depth specified at address Q, with feed,
– rapid-traverse retraction to point R,
– rapid-traverse approach of the previous depth as far as the clearance amount specified on
address E,
– drilling depth Q again, reckoned from the previous cut-in, with feed F (displacement E+Q),
– rapid-traverse retraction to point R.
The above procedure is carried on as far as the bottom point specified at address Z.