Canned Cycles for Drilling | NCT Group 99M, 2000M instruction

17 Canned Cycles for Drilling

17.1Detailed Description of Canned Cycles 17.1.1 High Speed Peck Drilling Cycle (G73)

Fig. 17.1.1-1

The variables used in the cycle are

G17 G73 Xp__ Yp__ Zp__ R__ Q__ E__ F__ L__

G18 G73 Zp__ Xp__ Yp__ R__ Q__ E__ F__ L__

G19 G73 Yp__ Zp__ Xp__ R__ Q__ E__ F__ L__

The operations of the cycle are

1.rapid-traverse positioning

2.-

3.rapid-traverse movement to 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, retraction to the initial point, in rapid traverse

10.-

Description of drilling operation 5 is as follows:

–drilling the cut-in depth specified at address Q in the workpiece, with feed,

–rapid-traverse retraction by the distance specified at address E or in parameter RETG73,

–drilling cut-in depth Q again, reckoned from the end point of the previous cut-in,

–rapid-traverse retraction at the value specified at address E.

The above procedure is carried on as far as the bottom point specified at address Z.

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