連続型インクジェットプリンタのインク濃度制御機構(機械力学,計測,自動制御)

概要

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We developed an ink concentration control system for continuous ink jet printers by using a unique inline viscometer. The ink concentration is constantly monitored by measuring the ink viscosity and temperature, and the control system can always accurately maintain the ink concentration by adjusting the ratio of solvent in the ink. The viscometer consists of a plunger moving vertically in a cylinder, a solenoid for raising the plunger by electromagnetic force, and a proximity sensor for detecting the position of the plunger. The viscosity can be calculated automatically from the free-fall time of the plunger from the top to the bottom of the cylinder. The viscometer can measure it rapidly, precisely, and automatically. Also, the reliability of the viscometer can be improved by repeatedly measuring the fall time of the plunger over a short period. Finally, our system can control the ink concentration within ±2% of the initial ink concentration.
社団法人日本機械学会の論文
2006-06-25