Vatech A9 (PHT-30CSS)
Technical manual
VDH-TeM-098
133 / 214
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6.3. Center Pin Position Calibration (POFS)
If Center pin position does not meet the standard by adjusting chinrest, adjust POFS value."
1. Acquire a Phantom image and open it.
2. Make sure that the Center Pin pixel number meets the standard and the ghost image has
bilateral symmetry as shown above.
3. If it is out of the standard value, change the [SPM_POFS_xxxxx] value and adjust it according to
the standard.
The pofs value is changed by about 2 pixels per 100 and has the following directionality.
* Default value: 00001
+: Move the image center to the left
*-: Move image center to the right
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