Hand-Held Micro-Fluid Ejection Device Orientation Control
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Solution Overview
Problem
Hand-held micro-fluid ejection devices face challenges in maintaining print quality due to unpredictable operator motion, which can result in print motion outside optimal speed, excessive rotation or acceleration, and separation from the substrate surface, leading to defects in image quality.
Innovation Solution
Incorporating a position sensor system and an electronic processor that monitor and control the ejection head's orientation relative to the substrate surface, disabling fluid ejection when thresholds for orientation, location, or motion parameters are exceeded, ensuring geometric accuracy and preventing print defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand-held micro-fluid ejection device is used with manual positioning, then ease of operation is improved, but manufacturing precision deteriorates due to unpredictable operator motion
Solution Approach 1:
The system incorporates sensors to detect the actual orientation and position of the ejection device during manual operation, and uses this feedback information to dynamically adjust printing parameters or block printing when orientation exceeds threshold limits, thereby maintaining print quality despite manual positioning variations
Solution Approach 2:
The system transitions from static orientation control to dynamic orientation monitoring and adjustment, where the threshold limit for orientation is continuously evaluated during operation, and the printing state is dynamically changed between enabled and disabled based on real-time orientation measurements
2Manufacturing precision
If position sensor system and electronic processor are added to monitor and control ejection head orientation, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The system monitors changes in orientation parameters and uses these parameter variations to control the printing state, enabling precise geometric accuracy control through parameter-based decision making rather than complex mechanical control mechanisms
Data Source
AI summary
A hand-held micro-fluid ejection device for ejecting a fluid onto a substrate surface in a plurality of physical orientations between the ejection device and a substrate surface, and methods for controlling the geometric accuracy of printing using a hand-held printing apparatus. Various spatial and dynamic orientations of the ejection device are measured, such as rotation angle, yaw angle, and velocity and acceleration vectors. Threshold limits are established for the orientations and printing is disabled if the measured values exceed the threshold limits.