Viscosity and negative pressure control system design for ink supply system

WU Hao
（Key Laboratory of E&M， Ministry of Education & Zhejiang Province，
Zhejiang University of Technology， Hangzhou 310014， China）

Abstract： In order to solve the problems of nozzle block and low image quality caused by viscosity decrease and ink-jet obstructed by unappropriate negative pressure，the viscosity and negative pressure control system was investigated. After the analysis of the relationship between viscosity and temperature， and the relationship between negative pressure and ink level， a system was presented to control viscosity and negative pressure by ink level and temperature separately. The system were tested on XJ500 ink supply system. The experimental results show that the viscosity of ink and negative pressure are well controlled.
Key words： ink supply system； viscosity； negative pressure