Circular Pattern, Lateral Surface G - HEIDENHAIN MANUALPLUS 620 User Manual

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).
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)
HEIDENHAIN MANUALplus 620
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..
N.. G74 XE.. P.. I..
. . .
[Milling pattern with linear slot]
N.. G746 Z.. C.. XS..
N.. G792 K.. A.. XS..
. . .
K.. A.. W.. Q..
K.. A.. W.. Q..
305