Seiko LTP F Series, Reference Manual

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3-8
(2) Excitation Sequence
When the voltage signals shown in Figure 3-6 are input to the motor drive circuit shown in
Figure 3-5, as shown in Table 3-3 , the LTP F Series feeds the paper in the normal direction
when the motor is excited in the order of step 1, step 2, step 3, step 4, step 1, step 2, . . . .
Figure 3-6 Input Voltage Signals for the Sample Drive Circuit
Table 3-3 Excitation Sequence
Input Signal Output Signal
PH1 PH2 B A B A
Step 1 L L L L H H
Step 2 H L L H H L
Step 3 H H H H L L
Step 4 L H H L L H
H
L
H
L
PH1
PH2
1 dot line
S
tep 1
S
tep 2
S
tep 3
S
tep 4
S
tep 1
S
tep 2
S
tep 3
S
tep 4