HEIDENHAIN TNC 640 (34059x-04) - Manual (Page 471)

Basis Functions (Software Option 50) 14.2
14
TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 3/2014
471
Graphical display of turning operations
You can graphically simulate turning processes with the line graphic
in Programming operating mode. The requirement for this is a
workpiece blank definition suitable for the turning process.
The assignment of the axes with turning is defined so that the
X coordinates describe the diameter of the workpiece and the
Z coordinates the longitudinal positions. To display the traverse
movements in Turning mode you must use a workpiece blank
definition with the spindle axis
Y.
Even when turning occurs in a 2D plane (X and Z coordinates) you
must still program the Y values when defining the workpiece blank.
The TNC requires the Y expansion for calculating the workpiece
blank cuboid. It is sufficient when you enter small values here
such as -1 and +1, as the Y coordinates in Turning mode are not
considered as the operating axis.
In the Program Test operating mode, you can only
use the 3D line graphic for simulating processing in
Turning mode.
NC syntax
0 BEGIN PGM SHOULDER MM
1 BLK FORM 0.1Y X+0 Y-1 Z-50
Definition of workpiece blank
2 BLK FORM 0.2 X+87 Y+1 Z+2
3 TOOL CALL 12
Tool call
4 M140 MB MAX Retract the tool
5 FUNCTION MODE TURN Activate Turning mode