HEIDENHAIN TNC 620, User Manual

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MOD functions | Selecting the position display
9.5 Selecting the position display
Application
In the
Display settings
group, you can influence the display of the
coordinates for
Manual operation
mode as well as for the
Program
run, full sequence
and
Program run, single block
operating
modes:
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 commanded by the control
The NOML and ACTL displays differ solely with regard to following error.
ACTL Actual position; current tool position
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.
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
ACTDST Distance remaining to the programmed position in the input coordinate system; differ-
ence between actual and target positions
Examples with Cycle
11
:
Scaling factor 0.2
L IX+10
The ACTDST display shows 10 mm.
The scaling factor does not have any influence.
Examples with Cycle
11
and tilted working plane:
Tilt A by 45°
Scaling factor 0.2
L IX+10
The ACTDST display shows 10 mm.
The scaling factor and the tilt do not have any influence.
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HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
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