HEIDENHAIN NC 124 - Manual (Page 22)

2 Working with the TNC 124 – First Steps
22 TNC 124
Selecting position display types
The TNC can display various position values for a specific tool
position.
The positions indicated in Fig. 2.6 are:
• Starting position of the tool A
• Target position of the tool Z
• Workpiece datum W
• Scale reference point M
The TNC position display can be set to show the following types of
information:
• Nominal position NOML. 1
The value presently commanded by the TNC.
• Actual position ACTL. 2
The position at which the tool is presently located as referenced
to the workpiece datum.
• Servo lag LAG 3
The difference between nominal and actual positions
(NOML. – ACTL.)
• Actual position as referenced to the scale reference point REF 4
To change the position display
➤ Press MOD.
➤ Page to the soft-key row containing the user parameter
Posit
.
➤ Press the soft key for selecting the position display type and
change to the other display type.
➤ Select the desired display type.
➤ Press MOD again.
For more information on user parameters, see Chapter 13.
Traverse limits
The maximum range of traverse of the machine axes is set by the
machine manufacturer.
4
2 3
1
Z
A
W
M
Fig. 2.6: Tool and workpiece positions
Y
Z
X
Z
min
Z
max
X
min Y
max
Y
min
X
max
Fig. 2.7: Traverse limits define the machine's
actual working envelope