MPI 40 Series - Mechanical Assemblies; Drive Mechanism; Door Mechanism; Cone;Clutch Assembly

3.2 MECHANICAL ASSEMBLIES
3.2.1 Drive Mechanism
The drive mechanism consists of an aluminum chassis and a glass
impregnated plastic frame. Mounted on the chassis is a spindle
and motor assembly for rotating the media; a stepper motor/band
combination for positioning the magentic head(s); and a cone/
clutch assembly for centering and holding the diskette under
operation.
3.2.2 Door Mechanism
The door mechanism consists of the door and door button which mount
within· the bezel. The door is attached to two door arms which are
spring loaded to keep the door in an open position when unlatched.
Closing the door will cause the door arms to contact and lower the
clutch arm; and partially rotate the ejector shaft to arm the
ejector release mechanism.
3.2.3 Cone/Clutch Assembly
The cone/clutch, which is attached to the clutch arm, is lowered
onto the spindle hub to center and clamp a diskette when the door
is closed.
3.2.4 Ejector Assembly
The ejector is designed to partially push the diskette from the
drive when the door is opened so it may be easily handled by the
operator. The ejector block is cocked when the diskette is in-
stalled. The ejector release mechanism is armed when the door is
closed by causing the ejector-spring-end to move beneath the
ejector block. When the door is opened, the spring-end will
trigger the ejector block forcing the diskette partially from the
drive.
3.2.5 Pressure Pad Assembly
The pressure pad is designed to keep the rotating diskette from
wobbling prior to passing over the read/write head(s). When the
door is closed the ejector shaft will rotate causing the shaft
mounted pressure pad adjustment block to force the foam rubber
pressure pad onto the diskette.
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