Dynamic Duty Control for Liquid Discharging Apparatus Viscosity
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Solution Overview
Problem
Existing liquid discharging apparatuses face issues with non-discharging states due to viscosity changes over time, leading to waste of media and liquids, as they typically control printing duty after the abnormality occurs.
Innovation Solution
A liquid discharging apparatus with a dynamic limit value setting mechanism that adjusts the discharging duty based on factors like viscosity changes, replenishment amounts, discharging amounts, non-operation time, and environmental conditions, using sensors and control units to optimize discharging efficiency and prevent waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printing duty is controlled after receiving a discharging abnormal signal, then the non-discharging abnormality is detected and addressed, but a medium such as printing paper or ink is wasted in the period from the occurrence of the abnormality to the controlling of the printing duty
Solution Approach 1:
The system performs preliminary action by detecting viscosity changes through discharging amount monitoring before non-discharging abnormality occurs. The control unit proactively adjusts printing duty based on detected viscosity increases, preventing the abnormality rather than reacting to it after detection, thereby eliminating medium waste that would occur in the period between abnormality occurrence and control implementation.
Solution Approach 2:
The system implements feedback by continuously monitoring the discharging amount and using this information to adjust the printing duty. The control unit receives feedback on actual discharging performance, compares it against expected values, and automatically modifies operating parameters to maintain reliable discharging, creating a closed-loop control system that prevents both waste and abnormality.
2Reliability
If the printing duty is decreased to prevent non-discharging, then discharging reliability is improved, but productivity is reduced due to lower discharging duty
Solution Approach 1:
The system applies dynamics by making the printing duty adjustable rather than fixed. The control unit dynamically modifies the printing duty based on real-time viscosity conditions detected through discharging amount monitoring. This allows the system to optimize between reliability and productivity by adapting the duty to current liquid properties rather than maintaining a conservative fixed duty level.
Solution Approach 2:
The system implements parameter changes by modifying the printing duty parameter in response to detected viscosity changes. When viscosity increases are detected through discharging amount analysis, the control unit adjusts the duty parameter to prevent non-discharging. This dynamic parameter adjustment maintains reliability while minimizing productivity loss compared to permanently reducing duty.
Data Source
AI summary
A liquid discharging apparatus includes a liquid discharging portion which discharges ink supplied from a liquid container, a limit value setting portion which sets a limit value L to be changed with time, and a discharging control portion which controls the liquid discharging portion to discharge the ink with a duty within a range of the limit value L set by the limit value setting portion.