Print Head Nozzle Spitting Scheduler
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Solution Overview
Problem
Printing apparatuses face challenges in maintaining nozzle temperature consistency during multi-pass printing jobs, leading to variations in print agent deposition and resulting image quality due to differences in nozzle temperature between passes.
Innovation Solution
A scheduler in the printing apparatus determines when to perform spitting procedures on the nozzles based on the number of printing passes and the amount of print agent required for each swath, ensuring that nozzles are brought to an optimal temperature before each printing pass by scheduling spitting procedures before the pass, thereby maintaining consistent nozzle temperature and print quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If spitting procedures are performed frequently to maintain nozzle temperature, then nozzle temperature consistency is improved, but print productivity deteriorates due to increased maintenance interruptions
Solution Approach 1:
The scheduler performs spitting procedures in advance before printing passes that require consistent nozzle temperature. By proactively maintaining nozzle temperature before critical printing operations, the system ensures print quality without requiring frequent interruptions during the printing process itself, thus resolving the contradiction between temperature stability and productivity
2Manufacturing precision
If spitting procedures are performed before every printing pass to maintain temperature, then print quality is improved, but time consumption increases
Solution Approach 1:
The scheduler performs spitting procedures in advance before printing passes that require consistent nozzle temperature. By proactively maintaining nozzle temperature before critical printing operations, the system ensures print quality without requiring frequent interruptions during the printing process itself, thus resolving the contradiction between temperature stability and productivity
3Temperature
If spitting procedures are scheduled based on print agent amount and pass number, then nozzle temperature control is improved, but system complexity increases
Solution Approach 1:
The scheduler performs spitting procedures in advance before printing passes that require consistent nozzle temperature. By proactively maintaining nozzle temperature before critical printing operations, the system ensures print quality without requiring frequent interruptions during the printing process itself, thus resolving the contradiction between temperature stability and productivity
Data Source
AI summary
A method is disclosed. The method may involve obtaining information indicative of a number of printing passes of a print head to print a swath on a printable medium. The method may comprise determining that the print head is to perform a particular printing pass which is one of: a printing pass during which an amount of print agent to be deposited from nozzles of the print head differs, by an amount that exceeds a defined threshold, from an amount of print agent to be deposited from the nozzles during a printing pass immediately preceding said particular printing pass; and a printing pass to print a swath which is the first of a plurality of adjacent swaths in which each swath has an area coverage exceeding a defined threshold. The method may comprise preparing, based on said obtained information, a schedule for a nozzle spitting procedure to commence before the print head performs the particular printing pass.