HEIDENHAIN TNC 640 (34059x-02) - Manual (Page 587)

Position Display Types 18.3
18
TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013
587
18.3 Position Display Types
Application
In the Manual Operation mode and in the Program Run modes of
operation, you can select the type of coordinates to be displayed.
The figure at right shows the different tool positions:
Starting position
Target position of the tool
Workpiece datum
Machine datum
The TNC position displays can show the following coordinates:
Function Display
Nominal position: the value presently
commanded by the TNC NOML.
Actual position; current tool position ACTL.
Reference position; the actual position relative
to the machine datum REF ACTL
Reference position; the nominal position
relative to the machine datum REF NOML
Servo lag; difference between nominal and
actual positions (following error) LAG
Distance remaining to the programmed
position; difference between actual and target
positions DIST
With the MOD function
Position display 1, you can select the
position display in the status display.
With the MOD function
Position display 2, you can select the
position display in the status display.