2-9
2.4.2 Motor Timing
Refer to the time chart in Figure 2-5 when designing the control circuit or software for starting and
stopping the motor. Also note 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 the same phase as the last one in the printing
step.
(2) Pause state
•
In the pause state, do not excite the step motor so as to prevent the motor from heating. Even
when the step motor is not excited, it keeps holding force to prevent paper from sliding.
(3) Start step
•
To restart the motor from the stop step, immediately shift the motor into the print sequence.
•
To restart the motor from the pause (no excitation) state, shift the motor into the print sequence
after outputting the same phase as that of the stop step for a single step.
Figure 2-5 Motor Start/Stop Timing
1 DOT LINE
STOP
STEP
M2
M1
PRINT STEP
PRINT STEP
H
L
H
L
H
L
H
L
PAUSE
STATE
START
STEP
M3
M4
Содержание LTP3445
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