Seiko Instruments LTP F Series 用户手册

Refer to the time chart in Figure 3-7 when designing the control circuit or software for starting and
stopping the motor.  Also, note the following precautions:

(1) Stop step

z

  To stop the motor, excite for 10 msec with the same phase as the last one in the

printing step.

(2) Pause state

z

  In the pause state, do not excite the step motor by having I0, I1 go high so as to prevent

the motor from heating.  Even when the step motor is not excited, it maintains force to
prevent the paper from sliding by a torque operation.

(3) Start step

z

  To restart the motor from the stop step, immediately shift the motor into the print

sequence.

z

  To restart the motor from the pause (no excitation) state, shift the motor into the print

step sequence after outputting the same phase as that of the stop step for the first step
time of the acceleration step.

Input signals for a sample drive circuit are shown in Figure 3-7.

Figure 3-7  Motor Start/Stop Timing

PH1

PH2

I0,I1

H

L

H

L

H

L

Print step

Pause

step

Pause

standby

Start

step

Print step