Heidenhain iTNC 530 (340 420) User Manual Page 51

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HEIDENHAIN iTNC 530 23
2.4 Datum Setting (Without a 3-D Touch Probe)
Datum setting
Select the Manual Operation mode.
Move the tool slowly until it touches the workpiece
surface.
Select an axis (all axes can also be selected via the
ASCII keyboard)
Zero tool in spindle axis: Set the display to a known
workpiece position (here, 0) or enter the thickness d
of the shim. In the tool axis, offset the tool radius.
Repeat the process for the remaining axes.
If you are using a preset tool, set the display of the tool axis to the
length L of the tool or enter the sum Z=L+d.
Fragile workpiece?
If the workpiece surface must not be scratched, you can
lay a metal shim of known thickness d on it. Then enter a
tool axis datum value that is larger than the desired datum
by the value d.
DATUM SET Z=
Y
X
Z
X
Y
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