HEIDENHAIN TNC 640, User Manual, Page: 678 / 948

Turning | Basic functions (option 50)
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Graphic display of turning operations
You can simulate turning operations in
Test Run
mode. The
requirement for this is a workpiece blank definition suitable for the
turning process and option number 20.
The machining times determined using the graphic
simulation do not correspond to the actual machining
times. Reasons for this during combined milling-turning
operations include the switching of operating modes.
Graphic display in the Programming mode of operation
You can graphically simulate turning processes with the line graphic
in
Programming
mode. To display the traverse movements in
turning mode in
Programming
mode, change the layout using the
soft keys.
Further information: "Generating a graphic for an existing
program", page 221
The standard 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.
Even if the turning operation takes place in a two-dimensional
plane (Z and X coordinates), you have to program the Y values for a
rectangular blank in the definition of the workpiece blank.
Example. Rectangular blank
0 BEGIN PGM BLK MM
1 BLK FORM 0.1Y X+0 Y-1 Z-50
Workpiece blank definition
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