Planmeca Proline XC Technical Manual page 80

Chapter D - ADJUSTMENT & CALIBRATION
Checking the eccentricity of the rotation movement
The eccentricity of the rotation movement must be checked after the patient positioning
mechanism adjustment. This is done by comparing the distances between the line on the
alignment ruler and the x-line on the ball phantom in "0° position" and in "180° position". If the
deviation is more than ±1 mm, the position of the secondary collimator should be adjusted.
Entering the 180° position:
Select the test mode.
Touch the ready field to drive the X-ray unit to the exposure position. When the X-ray unit is
ready the ready field is green.
Start to take a test exposure by pressing and holding down exposure button on the remote
control. Stop pressing the exposure button after about two seconds so that the rotating unit
stops moving.
An error code will appear on the display. Clear the error code from the display.
Manually adjust the rotating unit position so that the center line that runs through the tube
head and sensor head is at a right angle to the wall. Slide the alignment pin through the hole
in the top of the vertical carriage so that it goes into the positioning hole in the rotating unit.
NOTE Adjust the position of the rotating unit by holding the cassette carriage. Never use the
tube head to adjust the position.
Leave the ball phantom tool in position. Place the alignment ruler in position between the pri-
mary collimator and the secondary collimator as described earlier. Measure the distance
between the line on the alignment ruler and the x-line on the ball phantom (Fig. 51). The dis-
tance must be less than 1mm.
Tube head side
Figure 51
If the distance between the line on the alignment ruler and the x-line on the ball phantom is
more than 1mm, the secondary collimator position must be adjusted. Move the secondary col-
limator towards the ball phantom's x-line until the distance is less than 1 mm.
D-26 Planmeca Proline XC X-ray unit
S T A R T
Alignment ruler
Ball phantom
180° position
PATIENT POSITIONING MECHANISM
P L A N M E C A N o . 5 0 9 7 1
E N D
X - L I N E
Secondary collimator
side
Technical Manual