Seiko LTP1245R-C384-E - Motor Timing

3-8
3.4.2 Motor Timing
Refer to the timing chart in Figures 3-5 and 3-6 when designing the control circuit or software for starting
and stopping the motor. Also take note of the following precautions:
Precautions for Designing the Motor Control Circuit and Software
(1) Stop step
 To stop the motor, excite for a single step period with a phase that is the same as the last one in
the printing step.
(2) Pause state
 In the pause state, do not excite the step motor in order to prevent the motor from heating. Even
when the step motor is not excited, it maintains a holding force to prevent paper from sliding.
(3) Start step
 To restart the motor from the stop step, immediately shift the motor into the printing sequence.
 To restart the motor from the pause (no excitation) state, shift the motor into the printing sequence
after outputting a phase that is the same as that of the stop step for a single step.
When using the Sample Drive Circuit (Motor) :
Figure 3-5 Motor Start/Stop Timing (Sample Drive Circuit (Motor) )
STOP
STEP
PH2
PH1
PRINT STEP
PRINT STEP
H
L
L
H
H
L
L
H
PAUSE
STATE
START
STEP
PH3
PH4
1 DOT LINE