Droplet Deposition Head Datum Surface Alignment
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Solution Overview
Problem
Existing printheads are designed for specific printer configurations, making them difficult to install in different configurations without significant alignment adjustments, and they lack a robust alignment system for high-resolution applications.
Innovation Solution
A droplet deposition head with a datum surface arrangement featuring at least seven datum surfaces, allowing for alignment in both horizontal and vertical mounting systems, and a divider system with biasing means to secure the printhead, enabling secure and reproducible mounting across different configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If printheads are designed for specific printer configurations, then alignment precision for that configuration is improved, but adaptability to different mounting configurations deteriorates
Solution Approach 1:
The printhead is designed with a universal mounting system that includes multiple types of datum surfaces (primary, secondary, tertiary) and corresponding receiving surfaces that can accommodate both horizontal carriage mounting and vertical printbar mounting configurations. This allows the same printhead to be used across different printer architectures without requiring configuration-specific design modifications.
2Manufacturing precision
If printheads require significant alignment adjustments for different configurations, then manufacturing precision for each configuration can be optimized, but ease of installation and time consumption deteriorate
Solution Approach 1:
The mounting system incorporates pre-defined datum surfaces and receiving surfaces that are precisely manufactured during printhead and mounting component fabrication. The biasing means (springs) are pre-installed to automatically apply alignment forces during installation, eliminating the need for manual alignment adjustments by the installer.
Solution Approach 2:
The biasing means automatically apply forces to urge the printhead's datum surfaces against the mounting component's receiving surfaces during installation and operation. This self-aligning mechanism eliminates the need for external alignment tools or manual adjustment procedures, making the installation process straightforward and repeatable.
3Reliability
If a robust alignment system with multiple datum surfaces is implemented, then alignment accuracy and reliability are improved, but device complexity increases
Solution Approach 1:
The alignment system is segmented into three independent datum surface groups (primary, secondary, tertiary) with corresponding receiving surfaces. Each group handles specific alignment functions (vertical positioning, horizontal positioning, rotational alignment), allowing the complex alignment task to be divided into manageable, independent components that can be manufactured and verified separately.
4Manufacturing precision
If printheads are mounted closer together to improve resolution, then image quality is improved, but difficulty of precise mechanical alignment increases
Solution Approach 1:
The biasing means automatically apply forces to ensure precise alignment of closely-spaced printheads without requiring manual intervention. The spring-loaded mechanism compensates for manufacturing tolerances and maintains consistent alignment even when multiple printheads are mounted in close proximity, enabling high-resolution printing while simplifying the installation process.
Data Source
AI summary
A droplet deposition head including a datum surface arrangement for alignment of the head relative to an external mounting component in either a vertical mounting mode in which the head is held against a vertical mounting plate or a horizontal mounting mode where the head is held against a horizontal mounting plate. The datum surface arrangement comprising at least seven datum surfaces (x1; y1, y2, y3; z1, z2, z3) provided on the head, wherein five of the seven datum surfaces are provided for alignment in both vertical and horizontal mounting modes, and wherein a sixth datum surface (z3) is provided for alignment exclusively in said horizontal mounting mode and a seventh datum surface (y3) is provided for alignment exclusively in said vertical mounting mode.