Mitsubishi Electric Corporation

Kosuke Oda

Yoshifumi Yamamoto

Osamu Asano

Ichiro Furuki

Yusuke Kanatake

Akihito Ito

Makoto Sakuwa

Masatomo Sakaguchi

Tatsuya Egawa

An object is to provide a thermal transfer printer having an inexpensive configuration and capable of making a tension given to an ink ribbon as constant as possible, even when a secular change and an environmental change occur in a DC motor used as a supply motor and a winding motor. A supply motor control unit controls a supply motor of an ink ribbon supply unit. A winding motor control unit controls a winding motor of an ink ribbon winding unit. A remaining amount detection unit detects a remaining amount of an ink ribbon. A variable calculation unit acquires parameters for an armature current, an applied voltage, and a rotational speed of each of the supply motor and the winding motor, and calculates variables to be used for controlling the supply motor and the winding motor on the basis of the acquired parameters.

Thermal transfer printer

Speed fluctuations are decreased with a simple method even when a stepping motor () having comparatively large torque fluctuations is used. A drive pulse modulating unit () which modulates the frequency of a drive pulse to be inputted to the stepping motor () is provided. The drive pulse modulating unit () modulates the constant frequency of the drive pulse such that the frequency of the drive pulse within excitation-phase one cycle of the stepping motor () is: low for a period that is, by &#x215b; cycle of the excitation-phase one cycle, before an excitation phase where the vibration of the stepping motor is the maximum; and high in an excitation phase that is by &#xbd; cycle subsequent to the excitation phase where the drive pulse frequency is low.

Motor control device and printer device

A thermal printer of the present invention includes: a thermal head; a platen roller disposed to face the thermal head; a first path that guides a recording paper drawn from a recording paper roll to one entrance of a gap between the thermal head and the platen roller such that a first main surface of the recording paper is on the thermal head side; a second path that guides the recording paper drawn from the recording paper roll to the other entrance of the gap between the thermal head and the platen roller such that a second main surface of the recording paper is on the thermal head side; and a switch guide that switches between the first path and the second path.

Thermal printer

Growing community of inventors

Tokyo, Japan

Kosuke Oda