Planmeca Proline EC ceph, Technical Manual

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Chapter D - ADJUSTMENT & CALIBRATION
Planmeca Proline EC X-ray unit D-21
MECHANICAL ADJUSTMENT OF THE ROTATIONAL PART
Technical Manual
4.2 Adjustment of the guidance wheel
The guidance wheel can be adjusted if the driving wheel with gear is detached and clearance
between guidance and counter profile and is correctly adjusted. The guidance wheel is
attached to the rotating unit (1) through a flange (2). The flange is fixed to the rotating unit
with screws (3) and a bolt pin (4). By unscrewing the screws (3) the flange can be turned
around the bolt pin (4).
Figure 28
The guidance is adjusted when the rotating unit is in a position corresponding to the middle
point of the exposure. In principle, the guidance wheel should be placed as near the inner
edge of the groove as possible. For proper adjustment turn the rotating unit with both hands.
Always turn the rotating unit from the cassette head end and move it throughout the rotating
cycle calmly and at a speed corresponding to the actual speed. If the guidance wheel has
been adjusted too far from the inner edge of the groove, a clack of the counter profile meeting
the guidance profile can be heard when moving the unit from the start position to the middle
position. If the guidance wheel has been adjusted too close to the inner edge of the driving
groove the movement is sticky in an area corresponding to a 45° angle in relation to the cen-
tral area. The adjustment can be found only by experimenting.
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2
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4