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CASSETTE Transport Components
LEFT FRONT ROLLER AY
RIGHT FRONT ROLLER AY
LEFT MIDDLE ROLLER AY
RIGHT MIDDLE ROLLER AY
LEFT REAR ROLLER AY
RIGHT REAR ROLLER AY
L3 MIDDLE ROLLER SOLENOID
M2 LEFT CASSETTE DRIVE MOTOR
M3 RIGHT CASSETTE DRIVE MOTOR
1234563 – 12/12/94
The LEFT and RIGHT FRONT DRIVE ROLLER AYs each consist of 3 ROLLERS, mounted on a SHAFT. The RIGHT
ROLLER AY is stationary, whereas the LEFT ROLLER AY is moveable. The top 2 rollers of both assemblies are made of
soft plastic. The bottom left ROLLER is a plastic of medium hardness and the bottom right ROLLER is a very hard plastic.
When the CASSETTE is loaded, it is pinched by the left and right FRONT ROLLERS as the CASSETTE DRIVE MOTORS
move it toward the rear of the CR 800. Once the CASSETTE reaches the END STOP, the CASSETTE is clamped tightly
between the medium and hard bottom ROLLERS to ensure that it will remain stationary while the PLATE is removed.
The 2 MIDDLE DRIVE ROLLER AYs (left and right) function exactly the same as the FRONT ROLLER ASSEMBLIES
except that they are activated by the L3 MIDDLE ROLLER SOLENOID whenever a CASSETTE smaller than 35 x 35 cm
is inserted into the CR 800.
Each of the REAR ROLLER AYs has a top and bottom ROLLER. Both top ROLLERS and the bottom left ROLLER are
medium hardness while the bottom right ROLLER is very hard. When the DRIVE ROLLERS drive the CASSETTE into
position at the end stop, the CASSETTE is firmly wedged between the 2 bottom ROLLERS, ensuring that the
CASSETTE will remain stationary while the PLATE is removed and reinserted.
When the L3 MIDDLE ROLLER SOLENOID is energized, it prevents the MIDDLE DRIVE ROLLER from moving to the
clamp position.
After the system has detected and affirmed that a CASSETTE is ready to be loaded, the MSC directs the 2 CASSETTE
DRIVE MOTORS to start. They drive the TIMING BELT, which drives the DRIVE ROLLERS.
Cassette Handling / Plate Handling
7–31
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