HEIDENHAIN TNC 640 (34059x-05) ISO programming - Manual (Page 101)

Opening programs and entering 3.2
3
TNC 640 | User's ManualDIN/ISO Programming | 1/2015
101
Cylindrical blank
The cylindrical blank form is defined by the dimensions of the
cylinder:
Rotation axis X, Y or Z
R: Radius of the cylinder (with positive sign)
L: Length of the cylinder (with positive sign)
DIST: Shifting along the rotational axis
RI: Inside radius for a hollow cylinder
The DIST and RI parameters are optional and do not
need to be programmed.
Example: Display the BLK FORM CYLINDER in the NC program
%NEW G71 * Program begin, name, unit of measure
N10 BLK FORM CYLINDER Z R50 L105 DIST+5 RI10 Spindle axis, radius, length, distance, inside radius
N99999999 %NEW G71 * Program end, name, unit of measure
Rotationally symmetric blank of any shape
You define the contour of the rotationally symmetric blank in a
subprogram. Use X, Y or Z as the rotation axis.
In the workpiece blank definition you refer to the contour
description:
DIM_D, DIM-R: Diameter or radius of the rotationally
symmetrical blank form
LBL: Subprogram with the contour description
The contour description may contain negative values in the rotation
axis but only positive values in the reference axis. The contour
must be closed, i.e. the contour beginning corresponds to the
contour end.
The subprogram can be designated with a number,
an alphanumeric name, or a QS parameter.