DIN/ISO programming | Drilling cycles
4
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
375
Boring/cnt-sink G72
G72 is used for holes with contour definition (individual hole or hole
pattern).
Use G72 for the following axial and radial drilling functions using
driven or stationary tools:
Boring
Countersinking
Reaming
NC drilling
Centering
Parameters:
ID: Hole dimensions – name of the hole definition
NS: Starting block no. of contour – beginning of contour section
Reference to the contour of the hole (G49, G300 or G310-Geo)
RB: Return plane (default: retract to starting position or to safety
clearance; diameter value with radial holes and holes in the YZ
plane)
E: Period of dwell for chip breaking at end of hole (default: 0)
D: Retraction type
0: Rapid traverse
1: Feed rate
BS: Start elem.no. – number of the first hole to be machined in a
pattern
BE: End: elem.no. – number of the last hole to be machined in a
pattern
H: Brake off (1) (default: 0)
0: Spindle brake on
1: Spindle brake off
Cycle run:
1
Moves to the starting point at rapid traverse, depending on RB:
RB not programmed: Moves up to the safety clearance
RB programmed: Moves to the position RB and then to the
safety clearance
2 Drills at reduced feed rate (50%)
3 Moves at feed rate to end of hole
4
Retraction at rapid traverse or feed rate, depending on D
5 Retraction position:
RB not programmed: Retraction to the starting point
RB programmed: Retraction to the position RB
Hole pattern: NS refers to the hole contour, and not the
definition of the pattern.
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