FUJITSU MAG3091FC - Manual (Page 23)

C141-E078-02EN 1 - 6
(1) Disks
The disks have an outer diameter of 84 mm (3.31 inch) and inner diameter of 25 mm (0.98 inch).
The disks are good for at least 15,000 contact starts and stops. Each model contains following
number of disks.
MAF3364:10
MAG3182:5
MAG3091:3
(2) Heads
The MR (Magnet - Resistive) of the CSS (contact start/stop) type heads are in contact with the
disks when the disks are not rotating, and automatically float when the rotation is started. Figure
1.5 shows the configuration of disks and heads.
Figure 1.3 Disk/head configuration
(3) Spindle motor
The disks are rotated by a direct-drive hall-less DC motor. The motor speed is controlled by a
feedback circuit using the counter electromotive current to precisely maintain the speed at ±0.5%
of the specified speed.
MAG3182
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
12
13
14
15
16
17
18
MAF3364
Head No.
0
1
2
3
4
MAG3091