Carriage Component Arrangement for Liquid Jetting Apparatus Wobble Reduction
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Solution Overview
Problem
Ink-jet printers experience wobbling or oscillation of the carriage during movement due to an increased moment applied by the driving mechanism, exacerbated by the growing number of nozzles and corresponding larger ink storage sections, which affects printing quality by potentially deviating the ink landing position.
Innovation Solution
The liquid jetting apparatus rearranges the liquid jetting head and storage tank to sandwich the carriage's connection portion, thereby reducing the moment applied by the movement mechanism and stabilizing the carriage's center of gravity, thus minimizing wobbling during movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of nozzles is increased to improve printing speed and quality, then printing productivity is improved, but the ink-jet head and storage sections become larger, increasing the moment applied to the carriage and causing wobbling that deteriorates manufacturing precision
Solution Approach 1:
The patent repositions components along the scanning direction (horizontal dimension) rather than only in the vertical dimension. The ink-jet head is placed at one end of the carriage in the scanning direction while storage sections are distributed along the scanning direction, creating a balanced moment distribution that reduces wobbling during carriage movement.
Solution Approach 2:
The patent employs asymmetric arrangement of components on the carriage. Rather than symmetric placement that would create imbalance, the ink-jet head and storage sections are positioned asymmetrically along the scanning direction to optimize the center of gravity position and minimize the moment applied to the carriage during movement.
2Device complexity
If the ink-jet head and storage sections are arranged at one end of the carriage to simplify structure, then device complexity is reduced, but the center of gravity separates from the driving belt attachment, increasing the moment and causing carriage wobbling
Solution Approach 1:
The patent distributes components along the scanning direction (horizontal axis) rather than concentrating them at one end. The ink-jet head is positioned at one end while storage sections are arranged along the scanning direction, creating a balanced moment distribution that maintains carriage stability during movement.
Solution Approach 2:
The patent applies different positioning strategies to different components based on their function. The ink-jet head is positioned at one end for optimal jetting performance, while storage sections are distributed along the scanning direction to balance the moment, allowing each component to be optimally positioned for its specific function while maintaining overall system stability.
Data Source
AI summary
A liquid jetting apparatus includes: a head unit which includes a liquid jetting head which jets liquid and a liquid storage tank in which the liquid to be supplied to the liquid jetting head is stored; a guide member which extends in a first direction; a carriage which has a connection portion, carries the head unit, and is supported by the guide member to be movable in the first direction; and a movement mechanism which is connected to the connection portion of the carriage to move the carriage in the first direction, and the liquid jetting head and the liquid storage tank are arranged to sandwich the connection portion of the carriage therebetween.