| 摘要 |
PURPOSE:To improve productivity by a method wherein the open-and-close positions of a drum are detected, the relative positions are displayed digitally and interlocked with a digital switch. CONSTITUTION:The open-and-close positions of drums 4a and 4b are detected by a rotary sensor 30, signals of the open-and-close posotions are sent from an input circuit 35 to a display drive circuit 37 and the open-and-close positions are displayed digitally at the display part 36. The absolute positions with the drums 4a and 4b can always be displayed. These open-and-close position signals and reference position signals established by digital switches 38-1-38-7 are sent to coincidence circuits 39-1-39-7. When they coincide, relays 40-1-40-7 are driven to stabilize the open-and-close motions of the drums 4a and 4b. Additionally, since digital switches and a rotary sensor are used, information does not disappear even in time of source interruption. |
