| 摘要 |
PURPOSE:To eliminate the backlash of a main gear by engaging a plurality of stepping motors with the main gear and synchronously operating the motors in the same direction. CONSTITUTION:A pair of driven gears 3, 4 are disposed in mesh with a main gear 1 at the position corresponding to the gear 1 supported to an output shaft 2 for producing an output. The gears 3, 4 are respectively mounted on rotational shafts 5a, 6a of stepping motors 5, 6. When the motors 5, 6 are synchronously operated, the motors 5, 6 are rotatably driven at every prescribed angle per one pulse, and the drive gears 5, 6 are stepwisely driven. Thus, the gear 1 is stepwisely driven. |
