HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 344)

11-11
11 MOD Functions
TNC 425/TNC 415 B/TNC 407
Fig. 11.7: Orienting traverse limits to the workpiece
MOD
Y
Z
X
Z
min
Z
max
X
min
Y
max
Y
min
X
max
11.11 Setting Limits to Axis Traverse,
Datum Display
The AXIS LIMIT mod function allows you to set
limits to axis traverse within the machine's actual
working envelope.
Possible application:
to protect an indexing fixture against tool collision.
The maximum range of traverse of the machine
tool is defined by software limit switch. This range
can be additionally limited through the AXIS LIMIT
mod function. With this function you can enter the
maximum and minimum traverse positions for each
axis, referenced to the machine datum.
Working without additional traverse limits
To allow a machine axis to use its full range of traverse in a certain axis,
enter the maximum traverse of the TNC (+/- 99 999 mm) as AXIS LIMIT.
To find and enter the maximum traverse
Set the POSITION DISPLAY mod function to REF.
Move the spindle to the positive and negative end positions of the X, Y and Z axes.
Write down the values, including the algebraic sign.
Select the MOD functions.
Enter the values that you wrote down as LIMITS in the corresponding
axes.
Exit the MOD functions.
• The tool radius is not automatically compensated in the axis traverse limit values.
• The traverse range limits and software limit switches become active as soon as the reference points are passed
over.
Datum display
The values shown at the lower left are the manually set datums refer-
enced to the machine datum. They cannot be changed in the menu.