BASF 6106 - Drive Mechanism; Spindle and Front Ooor Mechanism

2.1.1 DRIVE MECHANISM
The spindle is rotated at 300 rpm by a DC drive
motor. Rotation of the spindle
is provided by a
belt and pulley. The drive motor is started and
stopped by the interface signal MOTOR ON.
The ratio between motor and spindle speed is
approximately 7:1. The drive mechanism is shown
in Fig. 2 - 2.
2.1.2 SPINDLE AND FRONT ODOR MECHANISM
The main parts of this mechanism are the drive
hub, the centering cone, the centering cone
expander
and the front door with press ure arm
and door latch (see Fig. 2 - 3). For loading,
a
diskette is inserted and the front door
pressed.
The pressure arm moves down, the
centering cone enters the Flexy Disk. Just
before the centerlng cone reaches the full
down position, the centering cone expander is
FRONT OOOR (closed)-----1'.
DOOR LATCH
DRIVE MOTOR
SPINDLE DRIVE
PULLEY
FIGURE 2 - 2
SPINDLE DRIVE HUB
DRIVE MECHANISM
activated and expands the centering cone which grips
the inner diameter of the Flexy
Disk to ensure correct
alignment. The door latch is activated and holds the
front door in a closed position. For un.loading a disk,
the
front door must be pressed again. The door latch
opens and the pressure arm is moved upwards by aspring.
The centering cone and centering cone expander also move
upwards and disengage the mini disk from the drive hub.
PRESSURE ARM
? - 2
CESTERING CONE EXP~~DER
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CENTERING CO:\[
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DRIVE Hl'B