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10
MOD Functions
TNC 426/TNC 425/TNC 415 B/TNC 407
Fig. 10.4:
Characteristic positions on the workpiece and scale
5
4
2
3
1
Z
Z
A
W
M
10.7 Position Display Types
The positions indicated in figure 10.4 are:
• Starting position
A
• Target position of the tool
Z
• Workpiece datum
W
• Scale reference point
M
The TNC position display can show the
following coordinates:
• Nominal position: the value presently
commanded by the TNC
1
....................................................... NOML.
• Actual position: the position at which the
tool is presently located
2
......................................................... ACTL.
• Servo lag: the difference between
nominal and actual positions
3
.................................................. LAG
• Reference position: the actual position as
referenced to the scale reference point
4
................................. REF
• Distance remaining to the programmed position: the
difference between actual and target positions
5
.................... DIST.
With the MOD function POSITION DISPLAY 1 (see figure 10.3) you can
select the position display in the status display.
With the MOD function POSITION DISPLAY 2 (see figure 10.3) you can
select the position display in the additional status display.
