| 摘要 |
PURPOSE:To know exactly the exchange cycles of consumable parts by detecting the degree of consumption of the consumable parts from the operating time of a main driving source such as drive motor of a device and displaying the same. CONSTITUTION:The count of a down-counter 13 is first set to the initial state of using the drive motor 7, for example, '9999'. The information on the rotation of the motor 7 is fed via an input/output circuit 5 to a CPU1 when the drive motor runs. The number of the pulses per time T of the prescribed number of revolutions of the drive motor corresponding to the respective consumable parts is calculated and is fed to counter devices 8-9 corresponding to the respective consumable parts at prescribed timings. The pulses are inputted to the base of a transistor (TR) 12 via the buffers 11 of the counters 8-9, by which the TR12 is turned on and the count is successively subtracted according to the revolution of the motor 7. |
