Sirona ORTHOPHOS XG 3 DS, Service Manual, Page: 224 / 578

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D3352.076.01.13.02 07.2008
4.4 Adjusting the cephalometer (XG
Plus
/ XG 5, if ceph is installed) Tabs 4
Coarse or precision adjustment? In most cases, the fixed point of rotation can be adjusted using precision
adjustment from the start (see steps 5 ff.). Only in exceptional cases, e.g. if
the exposed image area is completely outside the image field
C in an image
acquired with
PRECISION ADJUSTMENT
setting, is it necessary to perform a
coarse adjustment prior to precision adjustment D . To do this, deactivate the
PRECISION ADJUSTMENT
check box (see page 4-3) and then perform a
coarse adjustment proceeding in the same way as for precision adjustment.
The only difference between coarse and precision adjustment is the size of
the image area considered. Furthermore, there are fewer auxiliary lines in the
coarse adjustment mode.
X-ray image with unadjusted ceph fixed point of rotation:
Alternatively with precision adjustment setting (C) and coarse adjustment setting (D)
On the X-ray image with coarse adjustment D, the exposed area is still visible
in the image field. Even in this extreme case, an adjustment would still be pos-
sible.
NOTE
i
With SIDEXIS SW V01.45 and higher, a message window indicates whether a
coarse adjustment is required on completion of the precision exposure.
C D