HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 146)

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4.5 Definition of W
o
rk
piece Blank
4.5 Definition of Workpiece Blank
Chuck piece: bar/tube G20-Geo
G20 defines the contour of a cylinder/hollow cylinder.
Casting G21-Geo
G21 generates the contour of the blank part from the contour of the
finished part—plus the equidistant oversize P.
Example: G20-Geo
. . .
ROHTEIL [WORKPIECE BLANK]
N1 G20 X80 Z100 K2 I30 [hollow cylinder]
. . .
Parameters
X „ Cylinder/hollow cylinder diameter
„ Diameter of circumference of a polygonal blank
Z Length of the blank
K Right edge (distance between workpiece zero point and right
edge)
I Inside diameter of hollow cylinders
Example: G21-Geo
. . .
ROHTEIL [WORKPIECE BLANK]
N1 G21 P5 Q1 [cast blank]
. . .
FERTIGTEIL [FINISHED PART]
N2 G0 X30 Z0
N3 G1 X50 B-2
N4 G1 Z-40
N5 G1 X65
N6 G1 Z-70
. . .
Parameters
P Equidistant oversize (reference: finished part contour)
Q Hole Yes/No (default: 0)
„ Q=0: Without hole
„ Q=1: With hole