HEIDENHAIN TNC 640 User Manual page 678

16
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:
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
2 BLK FORM 0.2 X+87 Y+1 Z+2
3 TOOL CALL 12
4 M140 MB MAX
5 FUNCTION MODE TURN
678
"Generating a graphic for an existing
Turning | Basic functions (option 50)
Workpiece blank definition
Tool call
Retract the tool
Activate Turning mode
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017