BASF 6106 - Page 20

2.1.3 POSITIONING MECHAHIS~
The main parts of the positioning mechanism
are (see Fig. 2 - 4):
• Stepper
Motor
• Spiral Wheel
• Carriage Assembly
The stepper motor is a four phase motor and
1S rotated 150 by every step pulse.
The spiral wheel directly connected to the
shaft of the stepper motor converts the
rotational motion of the stepper motor to
a linear motion of the read write head
assenbly.
GUIDE BARS
R/W-HEAD
The BASF 6106 carriage assembly (Fig. 2 - 4a)
consists of the read/write head. and the head
load pressure
arm. The read/write head is inserted
in the carriage assembly, which rides on two guide
bars. The Flexy Disk is pressed against the readl
write head by the head load pressure arm. The head
load pressure
arm is released by the head load
mechanism.
In the BASF 6108 carriage assembly (Fig. 2 - 4b)
the head load pressure
pad is replaced by the upper
read/write head.
HEAD LOAD PRESSURE ARM
STEPPER MOTOR SHAFT
FIGURE 2 - 4 a) POSI rIONING MECHANISM BASF 6106
R/W-HEAO 0 (BUTTON TYPE)
R/W HEAD 1
(CA TAMARAN TYPE)
~~:jJ
FIGURE 2 - 4b) POSITIONING MECHANISM BASF 6108
2 - 3