HEIDENHAIN TNC 407 (280 580) ISO Programming - Manual (Page 297)

10-10
10 MOD Functions
TNC 426/TNC 425/TNC 415 B/TNC 407
Fig. 10.5: Orienting traverse limits to workpiece size
MOD
Y
Z
X
Z
min
Z
max
X
min
Y
max
Y
min
X
max
10.11 Axis Traverse Limits
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 switches. 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, enter the maxi-
mum traverse of the TNC (+/– 99999.999 mm) as the 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 of the screen are the manually set
datums referenced to the machine datum. They cannot be changed in the
menu.