HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 327)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
327
4.22 Dr
illing cy
cles
Circular pattern, lateral surface G746
Cycle G746 is used to machine drilling patterns or milling patterns in
which the individual features are arranged at a regular spacing in a
circle or circular arc on the lateral surface.
Parameter combinations for defining the center of the pattern and the
pattern positions:
 Center of pattern: Z, C
 Pattern positions:
 W and Q
 Wi and Q
If the Final point XE has not been defined, the drilling/milling cycle
or the figure definition of the next NC block is used as a reference.
Using this principle, you can combine pattern definitions with drilling
cycles (G71, G74, G36) or milling cycles (figure definitions with G314,
G315, G317).
Example: G746
%746.nc
[G746]
N1 T6 G197 S1200 G195 F0.2 M104
N2 M14
N3 G110 C0
N4 G0 X110 Z2
N5 G746 Z-40 C0 K40 Q8
N6 G71 XS102 K7
N7 M15
END
Example: Sequence of commands
[Simple drilling pattern]
N.. G746 Z.. C.. XS.. XE.. K.. A.. W.. Q..
. . .
[Drilling pattern with deep-hole drilling]
N.. G746 Z.. C.. XS.. K.. A.. W.. Q..
N.. G74 XE.. P.. I..
. . .
[Milling pattern with linear slot]
N.. G746 Z.. C.. XS.. K.. A.. W.. Q..
N.. G792 K.. A.. XS..
. . .
Parameters
Z Center of pattern in polar coordinates
C Angle (center point of pattern in polar coordinates)
XS Starting point of drilling/milling operation (diameter value)
XE Final point of drilling/milling operation (diameter value)
K (Pattern) diameter
A Starting angle (position of first hole/figure)
W Final angle (position of last hole/figure)
Wi Final angle (angle increment), distance to the next position
Q Number of holes/figures—(default: 1)
V Rotation direction (default: 0)
 V=0, without W: Figures are arranged on a full circle
 V=0, with W: Figures are arranged on the longer circular arc
 V=0, with Wi: The algebraic sign of Wi defines the direction
(Wi<0: clockwise)
 V=1, with W: Clockwise
 V=1, with Wi: Clockwise (algebraic sign of Wi has no effect)
 V=2, with W: Counterclockwise
 V=2, with Wi: Counterclockwise (algebraic sign of Wi has no
effect)