User`s manual

BD2-3880/3890 User’s Manual
21
9.2 Motor Drive
The MLT-388 and MLT-389 use a 4-phase bipolar stepping motor, which feeds paper by one dot
line in two steps by 2-to-2 phase excitation.
9.2.1 Motor Drive Features
1) Drive at an optimum drive speed by the VP voltage.
2) Prevents heat generation of the motor by PWM control to restrain current consumption.
3) Provides acceleration control at the time of start.
9.2.2 Maximum Motor Drive Speed at Major Voltage
CAUTION: The maximum drive speed depends on the VP voltage.
A printing speed may slightly differ depending on a processing time or voltage detection
accuracy. During the course of printing, a motor drive speed may be slower than the
maximum drive speed, depending on what is printed or the head divided drive system.
5V
6V
7.2V
VP Voltage
487 pps
702 pps
960 pps
Motor Drive Speed