HEIDENHAIN MANUALPLUS 620 - Page 325

HEIDENHAIN MANUALplus 620 325
4.26 Milling Cycles
Programming notes:
The cycle calculates the milling depth from ZS and ZE, taking the
oversizes into account.
Surfaces and figures defined with G797 (Q>0) are symmetric with
respect to the center. A figure defined in the following command can
be outside the center.
G797 Q0 .. is followed by:
 The figure to be milled with:
 Contour definition of the figure (G301 to G307)—see “Front and
Rear Face Contours” on page 207
 Conclusion of milling contour (G80)
 The free contour with:
 Starting point of milling contour (G100)
 Milling contour (G101, G102, G103)
 Conclusion of milling contour (G80)
Example: G797
%797.NC
[G797]
N1 T9 G197 S1200 G195 F0.2 M104
N2 M14
N3 G110 C0
N4 G0 X100 Z2
N5 G797 X100 Z0 ZE-5 B50 R2 A0 Q4 P2 U0.5
N6 G100 Z2
N7 M15
END
Example: G797/G304
%304_G305.NC
[G304]
N1 T7 G197 S1200 G195 F0.2 M104
N2 M14
N3 G110 C0
N4 G0 X100 Z2
N5 G797 X100 ZS0 ZE-5 Q0 P2 F0.15
N6 G304 XK20 YK5 R20
N7 G80
N4 G0 X100 Z2
N5 G797 X100 ZS0 ZE-5 Q0 P2 F0.15
N6 G305 XK20 YK5 R6 B30 K45 A20
N7 G80
N8 M15
END
Parameters
O Roughing/finishing
 0: Roughing. With each infeed, the complete surface is
machined.
 1: Finishing. The surface is machined with the last infeed.
In all previous infeeds, the cycle machines only the contour.
J Milling direction. For polygons without chamfers/rounding
arcs, J defines whether a unidirectional or bidirectional milling
operation is to be executed (see help graphic).
 0: Unidirectional
 1: Bidirectional