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Publication no. 201102
the lens backwards to decrease the size of the picture even more. When shipped the size
and position of the picture is set to work with Kodak cassettes or equivalent.
The mirror is a surface plated mirror. It should not be polished as this will destroy the silver
layer and affect the quality of the picture. The mirror can be moved backwards and forwards
and tilted. It is important to set the angle correct as if the angle is not 45 degrees the picture
will be a trapezoid instead of a rectangle.
3.2.8 Opening mechanism
The opening mechanism consists of a motor driving a screw. This screws drives a carriage
which glides on a shaft. The carriage has a finger that unlocks the lid and opens the lid. To
do this the finger has to move up and down and this is achieved by a cam on the back of the
opening mechanism assembly and a ball-bearing mounted on the back of the carriage which
rolls on this cam. On the left side of the opening mechanism assembly there is a code disk
mounted on the driving screw and a optical switch which is used as a pulse counter.
The opening sequence is described in chapter 2.2.3 and will not be repeated here.
The optical board mounted on the left side of the assembly can be sledded backwards and
forwards to adjust the cassette sensing point. This adjustment is described in the Diagnostic
chapter. There is no need for any adjustment for the pulse counter.
The only adjustment on the opening mechanism is the position on the cam. The cam can be
sledded sidewise to adjust the position when the finger goes down in the lid to unlock it. If
this position is set too far to the right the lid may not lock when closing the lid. If the position
is set too far to the left the finger may hit the edge of the window. When doing the adjustment
it is a good idea to gently press the finger down to get the play in its down position and then
move the carriage manually by rotating the screw. Also the setting should be checked with
all cassette types used. When the setting is correct, rotate the screw by hand through the
phase where the finger goes down and while doing so, push the finger gently upwards to get
the play in the upper position. This should be done to check that the carriage can in no way
hit the exposure unit.
In the finger there is a pin. There are two kinds of lids on the cassette types the Network ID
Camera can work with. One is made of metal with a metal locking mechanism. This lid is
used on all or many of Kodak's, Fuji's and Dupont's cassettes. The other is made of plastic
with a plastic locking mechanism. The plastic lid is more then 1mm thicker then the metal lid
which means that the finger has to reach 1mm deeper when the plastic lid is used. The
strength of the spring is such that when the metal lid with its metal locking mechanism the
locking mechanism will be able to push the pin upwards but when the plastic lid is used with
September 2003
14
NIC2-2 · Network ID Camera
Triacon AB Sweden
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