Magnetic Encoder Position Sensing for Can Decorator Registration
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Solution Overview
Problem
Existing can decorator machines face inaccuracies in detecting the positions of rotatory components for registration and print pressure due to limitations in linear inductive sensors, leading to errors in image placement and inefficient ink application, resulting in production losses and spoilage.
Innovation Solution
A remote registration and print pressure adjustment system utilizing a magnetic encoder position sensor to detect rotational parameters of rotatory components, coupled with a control system to adjust registration and print pressure mechanisms accurately based on these parameters, ensuring precise image placement and ink application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If linear inductive sensors are used to detect position of rotatory components, then the device complexity is reduced, but the measurement precision deteriorates leading to errors in image placement and print pressure
Solution Approach 1:
The patent replaces linear inductive sensors (mechanical/electromagnetic sensing system) with a magnetic encoder system that uses a magnet attached to the rotatory component and a magnetic sensor to detect rotational position. This substitution provides higher measurement precision through magnetic field detection while maintaining relatively simple device architecture.
Solution Approach 2:
The patent introduces a magnet as an intermediary element attached to the rotatory component. This magnet serves as a mediator that enables precise position detection by creating a magnetic field that can be accurately sensed by the magnetic encoder, thereby improving measurement precision without significantly increasing overall system complexity.
2Device complexity
If manual adjustment of registration and print pressure is performed, then the device complexity is minimized, but the manufacturing precision deteriorates resulting in production losses
Solution Approach 1:
The patent implements a feedback control system where the magnetic encoder continuously monitors the rotational position of components, and the control system automatically adjusts registration and print pressure settings based on detected position data. This closed-loop feedback mechanism achieves high manufacturing precision while keeping the adjustment system relatively simple through automated control.
Solution Approach 2:
The system enables self-adjustment of registration and print pressure parameters through automated control based on magnetic encoder feedback. The machine performs self-correction of positioning errors without requiring manual intervention, thereby improving manufacturing precision while minimizing the complexity of adjustment mechanisms.
3Measurement precision
If high precision position detection is implemented using magnetic encoders, then the measurement precision is improved, but the device complexity increases due to additional sensors and control systems
Solution Approach 1:
The patent divides the position detection function into discrete segments: a magnet attached to each rotatory component that needs monitoring, and corresponding magnetic sensors positioned at specific locations. This segmentation allows precise detection of individual component positions without requiring a complex unified sensing system, thereby improving measurement precision while managing device complexity through modular implementation.
4Manufacturing precision
If automated registration and print pressure adjustment is implemented, then the manufacturing precision is improved, but the device complexity and use of energy increase
Solution Approach 1:
The patent employs a universal control system that handles both registration adjustment and print pressure control functions through a single integrated platform. The magnetic encoder provides positional feedback that serves multiple adjustment purposes, and the control system coordinates both functions simultaneously. This multi-functionality approach improves manufacturing precision for both parameters while avoiding the complexity of separate dedicated control systems for each function.
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
The system enhances the accuracy of registration and print pressure adjustments, reducing errors and production losses by maintaining precise image alignment and ink application, thereby improving production efficiency and reducing spoilage.
Implementation Method 1
a magnetic encoder position sensor disposed in proximity to a rotatory component of the can decorator and structured to detect rotational position parameters of the rotatory component
Data Source
AI summary
A remote registration and print pressure adjustment system includes a can decorator including a plurality of plate cylinders and a plurality of inking stations, each plate cylinder being associated with an individual inking station; a magnetic encoder position sensor disposed in proximity to a rotatory component of the can decorator and structured to detect rotational position parameters of the rotatory component; and a remote registration and print pressure control system structured to receive a position signal including the rotational position parameters from the magnetic encoder position sensor, determine the linear distance based on the position signal and instant position of one of the registration mechanism and the print pressure adjustment mechanism based on the determined linear distance, and cause a corresponding actuator of the rotatory component to adjust the rotational positional parameters based on the instant position of one of the registration mechanism and the print pressure adjustment mechanism.