HEIDENHAIN TNC 370 User Manual page 302

11
MOD Functions
11.4 Setting the Axis Traverse Limits
Z4
The MOD function AXIS LIMITS allows you to set
limits to axis traverse within the machine's maxi-
mum working envelope.
Possible application:
to protect an indexing fixture from tool collision.
The maximum traverse range is defined by soft-
ware limit switches, This range can be additionally
limited through MOD function AXIS LIMITS. With
this function you can enter the maximum traverse
positions for the positive and negative axis direc-
tions. These values are referenced to the scale
datum.
Z
max
'min
max
Fig.
11 .l:
Traverse hmrts on
the workpIece
Working without additional traverse limits
To allow certain coordinate axes to use their full range of traverse, enter
the maximum traverse of the TNC 370 (+/- 30 000 mm) as the AXIS
LIMIT.
To find and enter the maximum traverse:
I
Select POSITION DISPLAY REF.
I
I
Move the spindle to the desired positive and negative end positions of the X, Y and Z axes.
I
I
Write down the values, noting the algebraic sign.
/ SelecttheMODfunctions.
L
Enter the values that you wrote down as LIMITS in the corresponding axes.
1
Exit the MOD functions
* The tool radius is not automatically compensated in the axis traverse limits values,
* Traverse range tint&s and software limit sw&hes
become
a&@
as soon as the reference marks are crossed
over.
* In every
axis
the TNC
checks
whethet
the
negative limit is smaller than the pasitiw one.
* The reference positions can also be captursd
directctly with the func%n "Actual Position Capture"
(see page 4-243,
-~
11-4
TNC 370