4.2.2Head
Figure 4.1 shows the read/write head structures. The MPC3045AH has 4 read/write heads, and MPC3065AH has 6. These heads are raised from the disk surface as the spindle motor approaches the rated rotation speed.
MPC3045AH Model |
|
Spindle | Actuator |
3 |
|
2 |
|
1 |
|
0 |
|
MPC3065AH Model
Spindle | Actuator |
5
4
3
2
1
0
Figure 4.1 Head structure
4.2.3Spindle
The spindle consists of a disk stack assembly and spindle motor. The disk stack assembly is activated by the direct drive
4.2.4Actuator
The actuator consists of a voice coil motor (VCM) and a head carriage. The VCM moves the head carriage along the inner or outer edge of the disk. The head carriage position is controlled by feeding back the difference of the target position that is detected and reproduced from the servo information read by the read/write head.
4.2.5Air filter
There are two types of air filters: a breather filter and a circulation filter.
The breather filter makes an air in and out of the DE to prevent unnecessary pressure around the spindle when the disk starts or stops rotating. When disk drives are transported under conditions where the air pressure changes a lot, filtered air is circulated in the DE.
The circulation filter cleans out dust and dirt from inside the DE. The disk drive cycles air continuously through the circulation filter through an enclosed loop air cycle system operated by a blower on the rotating disk.
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