HEIDENHAIN IK 5394-3D - Manual (Page 184)

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Chapter 3 Probes
After performing the auto focus teach, perform an edge teach for each VED
probe tool. This example uses the simple tool but all VED probe tools are
calibrated using the same method. Use edge teach to define the light-to-dark
edge characteristics for VED.
To perform an edge teach
Step 1
Click the autofocus button on the VED toolbar.
Step 2
Position the Z axis with a circle completely within the field of view and in focus
as shown.
Step 2
Click the simple probe button on the VED toolbar.