20.6 Select The Position Display; Application - HEIDENHAIN TNC 640 User Manual

20

20.6 Select the position display

Application

You can influence the display of the coordinates for the operating
mode Manual operation and the operating modes Program run,
full sequence and Program run, single block.
The figure on the right shows the different tool positions:
Initial position
Target position of the tool
Workpiece datum
Machine datum
You can select the following coordinates for the control's position
displays:
Display Function
NOML Nominal position: The value currently command-
ed by the control
ACTL Actual position; current tool position
REF ACTL Reference position; actual position relative to the
machine datum
REF NOML Reference position; nominal position relative to
the machine datum
LAG Servo lag; difference between nominal and actual
positions
802
The NOML and ACTL displays differ
solely with regard to following error.
Refer to your machine manual.
Your machine tool builder defines
whether the ACTL and NOML display
deviates from the programmed
position by the DL oversize of the tool
call.
MOD Functions | Select the position display
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017