Flatbed Printer Media Thickness Handling via Strip Segmentation
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Solution Overview
Problem
Existing flatbed printers face challenges in accurately printing on media pieces of varying thicknesses, leading to potential errors and safety hazards due to the need for manual measurement and positioning, which can result in incorrect print head height adjustments.
Innovation Solution
The flatbed surface is divided into strips with defined thickness ranges, and a control unit adjusts the print head distance accordingly, using markers or a projector system to guide the operator in placing media in the correct strip, and a registration system ensures accurate thickness measurement and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual measurement and positioning methods are used to place media on the flatbed surface, then the operator can position media pieces, but operator errors occur and positioning accuracy deteriorates
Solution Approach 1:
The system performs self-measurement and self-positioning of media pieces. The measurement system automatically detects the position and thickness of media without operator intervention, and the control unit automatically calculates and adjusts the print head distance, eliminating manual measurement errors while maintaining ease of operation
Solution Approach 2:
Manual mechanical measurement and positioning operations are replaced by an automated measurement system and control unit. The measurement system optically or electronically detects media position and thickness, while the control unit computationally determines the correct print head distance, substituting human operators with automated systems to improve precision
2Device complexity
If the print head distance to the flatbed surface is not adjusted according to media thickness, then the printing process is simple, but printing quality deteriorates and safety hazards occur
Solution Approach 1:
The print head distance is made dynamic and adaptable rather than fixed. The control unit automatically adjusts the print head distance based on the measured thickness of each media piece, allowing the system to adapt to varying media conditions. This dynamic adjustment ensures reliable printing across different media types while maintaining operational simplicity through automation
Solution Approach 2:
A feedback loop is established where the measurement system continuously monitors media thickness and position, communicates this information to the control unit, which then adjusts the print head distance accordingly. This closed-loop feedback system ensures printing safety and quality while managing complexity through automated control
3Measurement precision
If the flatbed surface is divided into strips with thickness ranges and automated measurement is implemented, then positioning precision improves, but device complexity increases
Solution Approach 1:
The flatbed surface is segmented into multiple strips, each designated for specific media thickness ranges. This segmentation allows the measurement system to quickly identify which strip a media piece occupies and apply appropriate printing parameters. The segmentation organizes the complexity into manageable sections while improving measurement and positioning precision
Solution Approach 2:
The measurement system and control unit are designed to handle multiple media types and thicknesses through a single integrated system. The control unit universally applies the same measurement and adjustment logic across all strips and media types, managing complexity through standardized multi-functional processing rather than separate systems for each media type
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables error-free printing on media pieces of different thicknesses by ensuring precise positioning and height adjustments, reducing operator errors and safety risks, and allowing for efficient handling of media with varying dimensions.
Implementation Method 1
When the latter ink is used, the print head is also provided with UV lamps for curing the recording material when ejected on the piece of media placed on the flatbed surface
Data Source
AI summary
A method for printing by means of a flatbed printer including a flatbed surface for placing a plurality of pieces of media to be printed upon, the plurality of pieces of media having different thicknesses, a control unit for controlling the printing of digital images on the plurality of pieces of media, a gantry constructed to move over the flatbed surface in a first direction and extending in a second direction, a print head configured to eject recording material on the plurality of pieces of media and attached to the gantry, the method including the steps of dividing the flatbed surface into a plurality of strips extending in the second direction over a length of the flatbed surface in the second direction, storing a position of each of the plurality of strips in storage of the control unit, for each strip coupling in storage a thickness range to the strip, the thickness range including a maximum allowed thickness for a piece of media to be placed in the strip on the flatbed surface and a minimum allowed thickness for a piece of media to be printed upon when placed in the strip on the flatbed surface, establishing a position of each piece of media of the plurality of pieces of media in the appropriate strip according to the thickness of the piece of media, moving the print head over the flatbed surface, and ejecting the recording material on the plurality of pieces of media when moving the print head over the flatbed surface, wherein upon the print head reaching a strip when moving over the flatbed surface, adapting the distance from the print head to the flatbed surface according to the thickness range coupled to the strip.