Automated Edge Holder Installation for Printhead Protection
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Solution Overview
Problem
Current printing systems face issues with image quality problems and printhead damage due to non-uniform substrate edges, which can occur if edge holders are not correctly installed or removed, leading to substrate jams and physical contact with the printhead.
Innovation Solution
An automated system for installing and removing edge holders using a printer controller, edge detector, and edge holder transport system, which positions and secures edge holders to prevent substrate edges from contacting the printhead, ensuring correct placement and removal without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual edge holder installation is used, then device complexity is reduced, but manufacturing precision and reliability deteriorate due to operator error
Solution Approach 1:
The system performs automatic edge holder installation and removal without requiring operator intervention. The controller automatically detects substrate edges, calculates optimal edge holder positions, transports edge holders to those positions, and secures them in place. This self-service approach eliminates manual placement errors while maintaining system simplicity through automation.
Solution Approach 2:
The system performs preliminary detection of substrate edges and preliminary calculation of optimal edge holder positions before actual installation. The edge holder transport system prepares and positions edge holders at predetermined locations based on advance detection, ensuring precise placement before the printing operation begins.
2Device complexity
If manual edge holder installation is used, then device complexity is reduced, but reliability worsens due to forgotten installation or removal
Solution Approach 1:
The system uses an edge detector to continuously monitor substrate edges and provides feedback to the controller. The controller uses this feedback to determine when edge holders need to be installed or removed, and confirms when these actions have been completed. This closed-loop feedback mechanism ensures edge holders are always in the correct state for the current substrate, eliminating forgotten installation or removal.
Solution Approach 2:
The system automatically manages the entire edge holder lifecycle including detection, positioning, installation, and removal without requiring operator memory or intervention. This self-service approach ensures reliability by making the system responsible for its own edge holder management rather than relying on human operators.
3Device complexity
If manual edge holder placement is used, then device complexity is reduced, but manufacturing precision deteriorates due to incorrect placement
Solution Approach 1:
The system replaces manual mechanical placement with an automated transport mechanism. The edge holder transport system uses controlled mechanical movement to precisely position and deposit edge holders at calculated locations, eliminating the imprecision of manual placement while maintaining relatively simple device architecture through systematic automation.
Solution Approach 2:
The system performs preliminary detection and calculation of optimal edge holder positions before physical installation. By determining the exact placement locations in advance based on substrate edge detection, the system ensures precise positioning is achieved through automated execution rather than manual measurement and placement.
Data Source
AI summary
According to one example there is provide a printing system that comprises a carriage moveable bi-directionally across a platen. The system additionally comprises a substrate edge detector to detect the position of a lateral edge of a substrate when positioned on a platen, a parking zone in which a substrate edge holder may be parked, and a substrate edge holder pick-up system on the carriage to pick up a substrate edge holder parked in the parking zone and to position the substrate edge holder on a detected lateral edge of a substrate positioned on the platen.