NCT Group NCT 990T - Manual (Page 83)

7.2.4 Calibrating Tool Offset Sensor
83
Calibrating the Sensor to Reference Point
The figure beside shows the interpretation of
CONTACT parameters.
Let us examine the following example.
Place a tool, the overhang of which is known
in the tool holder. The tool overhang is
indicated with X
T
, Z
T
on the diagram below.
Execute an automatic tool length measure-
ment as discussed in the previous chapter.
On the diagram it is in directions X–, Z–.
Read the selected X, as well as Z offset reg-
ister values indicated with X
(–)
, Z
(–)
on the
diagram. Calculate and enter the values of
the CONTACT parameter with the help of
the following equation:
CONTACTX– = X
(–)
– X
T
CONTACTZ– = Z
(–)
– Z
T
The procedure can also be applied for
the other buttons.