HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 169)

HEIDENHAIN CNC PILOT 4290 169
4.9 C-Axis Cont
ours—F
undamentals
End pocket/island G309-Geo
G309 defines the end of a reference plane. Every reference plane
defined with G308 must be ended with G309 (see “Milling contour
position” on page 168).
Example for G308/G309
Circular pattern with circular slots
For circular slots in circular patterns you program the pattern positions,
the center of curvature, the curvature radius and the position of the
slots.
The following rules apply in DIN PLUS and TURN PLUS for positioning
and orienting the slots:
„ Slots are arranged at the distance of the pattern radius about the
pattern center if
„ Pattern center = center of curvature and
„ Pattern radius = curvature radius
„ Slots are arranged at the distance of the pattern radius + curvature
radius about the pattern center if
„ Pattern center <> center of curvature or
„ Pattern radius <> curvature radius
In addition, the position influences the arrangement of the slots:
„ Normal position: The starting angle of the slot applies as a relative
value to the pattern position. The starting angle is added to the
pattern position.
„ Original position: The starting angle of the slot applies as an
absolute value to the pattern position.
The following examples show the programming of a circular pattern
with circular slots:
. . .
FERTIGTEIL [FINISHED PART]
. . .
STIRN Z0 [FRONT] Define reference plane
N7 G308 P-5 Beginning of rectangle with depth of –5
N8 G305 XK-5 YK-10 K50 B30 R3 A0 Rectangle
N9 G308 P-10 Beginning of “full circle in rectangle” with depth –
10
N10 G304 XK-3 YK-5 R8 Full circle
N11 G309 End of full circle
N12 G309 End of rectangle
MANTEL X100 [SURFACE] Define reference diameter
N13 G311 Z-10 C45 A0 K18 B8 P-5 Linear slot with depth –5
. . .