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Design and Function
5.3 Unit Description
5.3.1 Base Unit
Figure 5.3 Base Unit Mounted on Base Plate
The base unit contains all of the actuators and most of the sensors. It is placed on top of
the base plate and fixed with 4 screws on the bottom side, and 2 screws on the top side
of the base plate. The mechanical tolerances are fixed, there is no need to adjust any-
thing between the base plate and the base unit.
Pneumatic Cylinders
All actuators, except the motor driving the sample conveyor chain, are pneumatic cylin-
ders. All cylinders are single acting, this means they will move to their home position
without electrical power or sufficient air supply.
Under normal operation the sample release lever, the cassette clamp mechanism and
the sample guide are open.
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