| 摘要 |
PURPOSE:To execute a motor by single power source and to reduce driving heat generation by executing feeding by one track by two-step angle of a stepping motor, by driving the stepping motor by one or two phase excitation, and constituting so that phase excitation at the time of stopping the motor on the track will be one phase. CONSTITUTION:When three pulses are inputted, coils phi1 and phi2 are conducted when the first pulse is inputted, the coil phi1 is not conducted after fixed time (t)sec, and only the coil phi2 is conducted. When the second pulse is inputted, the coil phi2 and a coil phi3 are conducted, the coil phi2 is not conducted after fixed time (t)sec, and only the coil phi3 is conducted. When the third pulse is inputted, conduction of the coil is switched sequentially in the same way. Between input pulses, the coil and the switched fixed time (t) are about the half of access time between tracks. When access time between tracks is 6mS at present, (t) is set as 3mS. A distribution circuit 22 forms two pulses such as the pulse and the pulse after (t)sec by one input pulse, and controls so that transportation by one track will be executed by two pulses. |
