Epson 900N, Руководство по обслуживанию

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EPSON Stylus COLOR 900/900N Chapter 2 Operating Principles
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2.3.6 PF Motor Driver Circuit
The PF motor drive IC (LB1847: IC11) enables 4W1-2 phase excitation.
A stepping motor is used for the PF motor to move the carriage
accurately and also to minimize the motor’s vibration during printing.
Figure 2-18 shows the PF motor driver circuit block diagram. Table
2-13 shows the excitation modes used for the PF motor.
Table 2-13. PF Motor Excitation Modes
Figure 2-18. PF Motor Driver Circuit Block Diagram
Excitation mode Usage Minimum step
2-2 phase drive Not used 1/720"(0.035 mm)
1-2 phase drive
Fast feed 1
Fast feed 2
Special fast feed
1/1440"(0.018 mm)
W1-2 phase drive Not used 1/2880"(0.009 mm)
2W1-2 phase drive Middle-speed feed 1/5760"(0.004 mm)
4W1-2 phase drive
Normal feed
Micro adjust feed
Slow feed
1/11520"(0.004 mm)
+ 5
+ 4 2 + 4 2
+ 4 2
+ 4 2
C N 1 0
1
3
2
4
D / A x x
3
E 0 5 B 5 9 ( I C 2 )
7
6
9
8
1 4
2 8
1 5
2 5
2 4
2 3
2 2
1 8
1 9
2 0
2 1
2 7
1 6
2 6
1 7
2
1 3
1 4 0
1 3 9
1 3 8
1 3 7
1 3 3
1 3 4
1 3 5
1 3 6
1 4 2
1 2 8
1 4 1
1 2 9
1 2 4
1 2 7
L B 1 8 4 7 ( I C 1 1 )
1 2 5
1 2 6
1 2 3
N . C .
M 6 2 3 8 3 ( I C 1 7 )
+ 4 2
P F I A 0
P F I A 1
P F I A 2
P F I A 3
P F I B 0
P F I B 1
P F I B 2
P F I B 3
P F P H A A
P F P H A B
P F E N B A
P F E N B B
P F C T L 0
P F C T L 1
P F C T L 2
P F C T L ‚R
P F C T L ‚S
P h a s e A s e t t i n g
c u r r e n t s i g n a l
( 1 6 p a t t e r n s )
P h a s e B s e t t i n g
c u r r e n t s i g n a l
( 1 6 p a t t e r n s )
P h a s e C R A ( B )
s e l e c t i o n s i g n a l
P h a s e C R A ( B )
E N B ( p e r m i s s i o n )
s i g n a l
M o t o r s u b
c o n t r o l
I A 1
I A 2
I A 3
I A 4
I B 1
I B 2
I B 3
I B 4
P H A S E 1
P H A S E 2
E N A B L E 1
E N A B L E 2
V R E F 1
V R E F 2
O U T A
O U T - A
O U T B
O U T - B
V B B
V C C
G N D
P F F A
P F - A
P F B
P F - B