Calibration Method for Plate Element Location Mark Detection
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Solution Overview
Problem
Current calibration methods for processing machines in the printing and packaging industry are time-consuming and material-intensive, requiring operator expertise and consuming plate elements during startup, while also being inefficient in ensuring precise positioning of location marks on diverse materials.
Innovation Solution
A calibration method that uses an introducer with a fastening device to secure plate elements and a control unit to drive a back-and-forth movement, simultaneously illuminating and measuring location marks with adjustable illumination parameters, such as direct or indirect light of varying intensity, to determine optimal detection settings for each batch of plate elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional calibration methods are used with operator expertise and manual adjustment, then calibration accuracy can be achieved, but calibration time and material consumption increase significantly
Solution Approach 1:
The system performs self-calibration automatically without operator intervention. The control unit executes calibration routines that involve moving the introducer back and forth while sensors detect location marks, and the system automatically adjusts illumination parameters and determines optimal detection settings based on the detected marks, eliminating the need for manual operator calibration
Solution Approach 2:
The calibration process is performed automatically at the beginning of each job or processing batch. The control unit initiates the calibration sequence that moves the introducer, activates illumination devices, detects location marks, and determines optimal parameters before actual production begins, ensuring precision is established in advance without manual intervention
2Measurement precision
If traditional calibration methods are used with manual adjustment and testing, then acceptable results can be obtained, but plate element consumption increases during calibration
Solution Approach 1:
The system automatically detects location marks on plate elements during calibration without requiring operators to manually test multiple elements. The sensor system scans for location marks and the control unit processes the detection data to determine optimal calibration parameters, eliminating wasteful manual trial-and-error consumption of plate elements
Solution Approach 2:
The manual mechanical calibration process is replaced with an automated optical detection system. Sensors detect location marks optically, and the control unit automatically processes this information to determine calibration parameters, replacing the mechanical trial-and-error approach with an automated measurement and calculation system that consumes fewer materials
3Ease of operation
If fixed illumination parameters are used for calibration, then the system is simple to operate, but detection precision varies across different materials and print types
Solution Approach 1:
The illumination parameters are made dynamic and adaptive rather than fixed. The control unit automatically adjusts illumination intensity, duration, and positioning based on the detected location marks and material characteristics. This dynamic adjustment ensures optimal detection precision for different materials, prints, and lighting conditions while maintaining ease of operation through automation
Solution Approach 2:
The system automatically changes illumination parameters (intensity, duration, position) based on detection requirements. The control unit monitors detection quality and adjusts illumination parameters in real-time during calibration to optimize location mark detection across different materials and print types, eliminating the need for manual parameter setting while maintaining operational simplicity
4Reliability
If extensive manual calibration testing is performed to ensure quality, then processing quality can be maintained, but productivity during startup decreases
Solution Approach 1:
The system performs self-calibration automatically, executing a streamlined calibration sequence controlled by the control unit. This automated process ensures processing quality through consistent, repeatable calibration routines while significantly reducing startup time compared to manual testing, thereby improving startup productivity without sacrificing reliability
Solution Approach 2:
The calibration process is designed as a continuous automated sequence rather than discrete manual testing steps. The control unit orchestrates a continuous flow of introducer movement, illumination activation, mark detection, and parameter determination without interruption or manual intervention, maintaining quality assurance while maximizing startup productivity through uninterrupted calibration execution
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 significantly reduces startup time and material consumption by ensuring precise detection of location marks across different materials, improving the quality of processing operations and minimizing errors in positioning.
Implementation Method 1
at least one illumination device (7) which illuminates the location mark (12) printed on the surface of the plate element (10)
Implementation Method 2
at least one sensor (7) which measures light reflected by the surface of the plate element (10) when it is illuminated by the illumination device (7)
Data Source
AI summary
A calibration method and machine for detecting a location mark (12) printed on plate elements (10) within a processing machine (1) having an introducer (20) for positioning the plate elements (10) into a plurality of gripping members (31) of a conveyor (30) which conveys them in rhythmical motion into successive stations (3, 4, 5). The introducer (20) includes a fastening device to the plate elements. The introducer (20) is driven by a control unit (40) that also drives at least one illuminating device and at least one sensor (7). A plate element (10) is selected from a batch of them. The fastening device fixes the plate element (10) to the introducer (20). The introducer (20) is driven to perform a succession of back-and-forth movements with the plate element (10). At the time of each back-and-forth movement, the illumination device subjects the location mark (12) printed on the plate element (10) to a different illumination, and the sensor (7) performs a corresponding measurement, so as to obtain a succession of measurements. The calibrated illumination parameters that will be used during the processing of the whole batch of plate elements (10) are determined according to the succession of measurements obtained.