Planmeca Proline EC ceph, Technical Manual

Page: 153 / 210

Chapter E - DIMAX3 DIGITAL SYSTEM ADJUSTMENT
Planmeca Proline EC X-ray unit E-59
CEPHALOSTAT ADJUSTMENT
Technical Manual
7.6 Checking the head support position
Remove the sensor alignment tool and attach the sensor head to the cephalostat head sup-
port.
Press and hold the P key until you have heard two audible signals. The latest used image
area number starts to flash on the main display.
Select the image area 6 with the program selection keys. The text CPH6 will appear on the
main display. The rotating unit will move automatically to the correct position for taking cepha-
lometric exposures.
Remove the sensor alignment tool from the cephalostat quick connector mechanism, if
needed. Attach the sensor head to the quick connector.
Rotate the head support to the 90° position and place the two ear posts into their holders if
they are not already installed.
Figure 109
Embedded in the end of the left (V or L) ear post there is a metal ball and embedded in the
end of the right ear post (O or R) is a metal ring. The images of these that appear on an
exposed image are used to check the alignment of the ear posts.
Select exposure values of approximately 70 and a milliampere value of 10.
Stand behind the tubehead, protect yourself from radiation and take an exposure.
On the image you will see the images of a metal ball and a metal ring. The must be concen-
tric, or if not exactly concentric there must be a small gap between the edge of the ball and
the inner edge of the circle.
Figure 110
If the ball touches the ring the ear posts must be adjusted. Refer to section “Head support
adjustment” on page E-60.
P
Dim219_2.eps
Head support
Ball
Ring
Correct Correct Wrong