| 摘要 |
PURPOSE:To make both an ink key regulator and a control panel more miniaturized and less expensived than traditionally required by controlling a control system in an open loop method, by a method wherein the stepping motor as a far or near drive source of an ink key is provided at each ink key. CONSTITUTION:Before an ink key 1 is set, all ink key regulation stepping motors 2 are rotated fora specific time so that the ink key 1 is closed. The purpose of this operation is to set a zero point uniformly and the stepping motor 2 of which the ink key 1 has reached the zero point earlier, is stopped with a lower limit stopper projection 40. Then, when all the ink keys have reached the zero point, the number of pulses in proportion to each data is respectively given each stepping motor 2. The said stepping motor 2 is rotated by an amount is proportion thereto and the regulation of ink feed amount is completed. Because the control system is thus controlled in an open loop method, both the ink key regulator and the control panel can be remardably made more miniaturized and less expensive then traditionally required. |
