HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 325)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
325
4.22 Dr
illing cy
cles
Circular pattern, face G745
Cycle G745 is used to machine drilling or milling patterns in which the
individual features are arranged at a regular spacing in a circle or
circular arc on the face.
If the Final point ZE has not been defined, the drilling/milling cycle
of the next NC block is used as a reference. Using this principle, you
can combine pattern definitions with
 Drilling cycles (G71, G74, G36)
 The milling cycle for a linear slot (G791)
 The contour milling cycle with "free contour" (G793)
Parameter combinations for defining the center of the pattern and
the pattern positions:
 Center of pattern:
 X, C
 XK, YK
 Pattern positions:
 A, W and Q
 A, Wi and Q
Example: G745
%745.nc
[G745]
N1 T7 G197 S1200 G195 F0.2 M104
N2 M14
N3 G110 C0
N4 G0 X100 Z2
N5 G745 XK0 YK0 K50 A0 Q3
N6 G791 K30 A0 ZS0 ZE-5 P2 F0.15
N7 M15
END
Example: Sequence of commands
[Simple drilling pattern]
N.. G745 XK.. YK.. ZS.. ZE.. A.. W.. Q..
. . .
[Drilling pattern with deep-hole drilling]
N.. G745 XK.. YK.. ZS.. A.. W.. Q..
N.. G74 ZE.. P.. I..
. . .
[Milling pattern with linear slot]
N.. G745 XK.. YK.. ZS.. ZE.. A.. W.. Q..
N.. G791 K.. A.. Z..
. . .
Parameters
XK Center of pattern in Cartesian coordinates
YK Center of pattern in Cartesian coordinates
ZS Starting point of drilling/milling operation
ZE Final point of drilling/milling operation
X Diameter (center point of pattern in polar coordinates)
C Angle (center point of pattern in polar coordinates)
A Starting angle (position of first hole/figure)
W Final angle (position of last hole/figure)
Wi Final angle (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)