FUJITSU MPG3XXXAH-E - Manual (Page 64)

C141-E116-01EN 4 - 17
4.7.3 Servo frame format
As the servo information, the drive uses the two-phase servo generated from the gray code and Pos
A to D. This servo information is used for positioning operation of radius direction and position
detection of circumstance direction.
The servo frame consists of 5 blocks; write/read recovery, servo mark, gray code, Pos A to D and
PAD. Figure 4.6 shows the servo frame format.
Pos
C
PAD
Pos
D
Pos
B
Pos
A
1.81
µ
s
0.17
µ
s 0.16
µ
s
0.72
µ
s
R/W Recovery Field
0.56
µ
s 0.56
µ
s 0.56
µ
s 0.74
µ
s 0.80
µ
s
PA
SSM ASM
SCD
0.53
µ
s
Servo
Frame
DATA DATA
Servo
Frame
86.81
µ
s
6.63
µ
s
Figure 4.6 96 servo frames in each track