HEIDENHAIN PT 855 for Milling - Manual (Page 24)

I - 2 Working with POSITIP – First Steps
22 Operating Instructions POSITIP 855
Probing functions for datum setting
The POSITIP's probing functions enable you to set datum points
with a HEIDENHAIN KT Edge Finder. The probing functions are
also available when you are using a tool instead of an edge finder.
Datum setting with the edge finder
It is particularly easy to set datum points with a HEIDENHAIN
KT Edge Finder. The following probing functions are available:
• Workpiece edge as datum:
Edge
• Centerline between two workpiece edges:
Centerline
• Center of a hole or cylinder:
Circle Center
With Circle Center, the hole must be in a main plane.
The three main planes are formed by the axes X / Y, Y / Z
and Z / X.
The HEIDENHAIN KT 120 Edge Finder can only be
used with electrically conductive workpieces.
Preparation: Enter the stylus diameter and select the datum
ä Press MOD and go to the soft key row containing the soft key
Edge Finder.
ä Select the user parameter
Edge Finder
.
ä Enter the diameter of the edge finder stylus and confirm with
ENT.
ä Select the user parameter
Datum
.
ä Enter the number of the desired datum and confirm with ENT.
ä Press MOD again.
The number of the selected datum is now shown at the lower
right of the screen.
In all probing functions, POSITIP takes into account the entered
stylus diameter.
For more information on user parameters, see chapter I - 7.
Exiting the probing function
While the probing function is active, POSITIP displays the soft key
Escape
. Choose this soft key to return to the opening state of the
selected probing function.
Fig. 19: The HEIDENHAIN KT Edge Finder