Planmeca Proline EC ceph, Technical Manual

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Chapter I - FUNCTIONAL DESCRIPTION
Planmeca Proline EC X-ray unit I-7
MECHANICAL CONSTRUCTION AND OPERATION
Technical Manual
1.6 Collimator/primary slot mechanism, Planmeca Proline EC
Pan/Ceph X-ray unit
The collimator tube (Fig. 6, 1) is attached with screws to the radiation window frame. Under a
nut there is an inner primary slot sheet which consists of an aluminium filter plate and lead
plates with holes. The lead plate reduces the radiation beam for the actual primary slot. The
aluminium plate filters the harmful soft radiation. In the outer part of the collimator tube there
is a second inner primary slot (Fig. 6, 2) which reduces secondary radiation scattering from
the inner parts of the collimator tube.
Part (Fig. 6, 3) is the frame of the primary slot mechanism. The primary slot (Fig. 6, 4) is
attached to a slot carriage (Fig. 6, 5) which is attached with bearings to the frame. The step-
per motor draws the slot carriage through a screw (Fig. 6, 6) and a nut (Fig. 6, 7). The drive
nut has a plate which together with an optic sensor (Fig. 6, 2) composes the place reference
for the primary slot.
The microprocessor controls the stepper motor. Motor commandment is described in section
“Motors” on page I-14.
The function of the PCB 105-10-08 is described in section “Circuit boards” on page I-12.
Figure 6
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