| 摘要 |
PURPOSE:To enable accurate alignment by transmitting one cycle of an excitation pattern a certain time before resist motor drive timing, eliminating an excitation phase shift between a rotor and a stator, and holding the transmitted excitation pattern. CONSTITUTION:It is inspected whether or not there is an excitation pattern output command before driving and, if the command is found, 'low' is transmitted from the port P26 of a microcomputer IC1 and switchover to a power down mode is performed. Microservice completion interrupt of a pulse rate timer TM1 is processed and the pulse rate timer TM1 is started. The leading excitation pattern is transmitted to PO0-4 through POH/POL. Macroservice completion interrupt of the TM1 is permitted. The status of a resist motor is set to zero and returned. That is, the macroservice of the TM1 transmits one cycle of the excitation pattern until the macroservice completion interrupt of the TM1 occurs. |
