NCT Group 2000M, 99M manual Canned Cycles for Drilling

17 Canned Cycles for Drilling

17.1.14 Boring Cycle (Dwell on the Bottom Point, Retraction with Feed) (G89)

Fig. 17.1.14-1

The variables used in the cycle are

G17 G89 Xp__ Yp__ Zp__ R__ P__ F__ L__

G18 G89 Zp__ Xp__ Yp__ R__ P__ F__ L__

G19 G89 Yp__ Zp__ Xp__ R__ P__ F__ L__

The operations of the cycle are

1.rapid-traverse positioning in the selected plane

2.-

3.rapid-traverse movement to point R

4.-

5.boring as far as the bottom point, with feed F

6.dwelling with the value specified at address P

7.retraction to point R, with feed F

8.-

9.with G98, rapid-traverse retraction to the initial point

10.-

Except for dwelling, the cycle is identical with G85.

17.2 Notes to the use of canned cycles

–The drilling cycle will be executed in cycle mode provided a block without code G contains one of the addresses

Xp, Yp, Zp, or R

Otherwise, the drilling cycle will not be executed.

–With dwell G04 P programmed in cycle mode, the command will be executed in conformity with P programmed, but the cycle variable of dwell will not be deleted and will not be re-written.

–The values of I, J, K, Q, E, P have to be specified in a block, in which drilling is also performed, or else the values will not be stored.

156