HEIDENHAIN IK 5394-3D - Manual (Page 336)

Chapter 4 Programming
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Step 3
Click the center mouse button to fire the probe tool.
Step 4
Click OK in the dialog.
The QC-5000 will use this feature to locate the randomly place parts.
Create a the rest of the part program measuring all the features of the part.
NOTE
Save the reference frame in the part program immediately after
creating the datum.