Electrode Meandering Correction Using Coordinated EPC Feedback
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Solution Overview
Problem
Conventional electrode meandering correction apparatuses fail to effectively stabilize the edge position of electrodes during the roll-to-roll process due to mismatched reference values between the line EPC unit and the final EPC unit, leading to increased meandering defects and excessive motor load.
Innovation Solution
A meandering correction apparatus and method that feedback-controls the line edge position control (EPC) unit and input clamp unit using data from the determination edge position sensor (EPS) to stabilize the edge position and input inclination, ensuring alignment with the determination EPS edge reference value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the line EPC unit and final EPC unit operate independently with mismatched reference values, then each unit can function autonomously, but the edge position of the electrode cannot be effectively stabilized and meandering defects increase
Solution Approach 1:
The patent implements feedback control by having the final EPC unit measure the actual edge position of the electrode using an edge position sensor, calculate the difference between the measured position and the reference position, and transmit this difference value to the line EPC unit. The line EPC unit then adjusts the electrode edge position based on this feedback, creating a closed-loop control system that stabilizes the edge position and reduces meandering defects.
Solution Approach 2:
The patent merges the control functions of the line EPC unit and final EPC unit into a coordinated system. Instead of operating independently, the two units are integrated through feedback communication, where the final EPC unit's measurement and the line EPC unit's adjustment work together as a unified control mechanism, resolving the contradiction between autonomous function and coordinated stability.
2Manufacturing precision
If the final EPC unit compensates for all meandering, then edge position can be corrected, but motor load becomes excessive
Solution Approach 1:
The patent applies preliminary action by having the line EPC unit proactively adjust the electrode edge position based on feedback from the final EPC unit before the electrode reaches the final EPC unit. This preventive adjustment reduces the amount of correction needed later, distributing the correction effort across both units and avoiding excessive motor load on the final EPC unit while maintaining edge position accuracy.
3Measurement precision
If multiple EPC units are used to correct meandering, then edge position control is enhanced, but system complexity and coordination difficulty increase
Solution Approach 1:
The patent uses feedback control to simplify the coordination between multiple EPC units. The final EPC unit measures the edge position and sends the difference value back to the line EPC unit, which then makes adjustments. This feedback mechanism provides a clear, simple coordination protocol that enhances measurement precision while avoiding complex multi-unit coordination difficulties.
Data Source
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Figure 2
Figure 3(a)~3(b)
AI summary
An apparatus and method for correcting meandering of an electrode are provided. An edge position of the electrode is feedback-controlled so that a determination edge position sensor (EPS) edge position value matches a determination EPS edge reference value, and each of a line edge position control (EPC) unit and an input clamp unit is feedback-controlled so that a direction in which the electrode is transferred from a line EPC roller is corrected and an input inclination of an input clamp roller is corrected by comparing pieces of data on the determination EPS edge position values when the determination EPS edge position values change over time to converge to the determination EPS edge reference value by the feedback control, and the determination EPS edge reference value.