Belt Controller Misalignment Correction
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Solution Overview
Problem
Conventional belt alignment methods in image forming apparatuses rely on feedback control, which may not effectively correct misalignment before the belt starts moving, potentially leading to contact with sensors and increased convergence time to a desired position.
Innovation Solution
A belt controller that detects misalignment before belt movement and presses the belt to reduce misalignment using a steering roller, followed by feedback control to adjust the belt position, ensuring alignment within specified thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback control is used to correct belt misalignment, then the belt position can be adjusted according to detected misalignment, but the belt may already have excessive misalignment before movement starts and may contact sensors
Solution Approach 1:
The patent applies preliminary action by detecting belt misalignment before the belt starts moving and pressing the belt in advance to reduce excessive misalignment. The controller detects the degree of misalignment using a sensor, and if it exceeds a threshold, presses the belt against the housing to correct the alignment before operation begins, preventing sensor contact and reducing convergence time during actual operation.
2Manufacturing precision
If the belt is pressed to reduce misalignment before movement, then alignment accuracy improves, but additional control mechanisms are required
Solution Approach 1:
The patent applies self-service by using the belt's own pressing mechanism against the housing to correct its own misalignment. The system uses the existing structural components (housing, belt, and pressing surface) to achieve alignment correction without requiring external alignment devices or complex additional control mechanisms, thereby improving alignment precision while maintaining simplicity.
Data Source
AI summary
A belt controller, an image forming apparatus, a belt controlling method, and a recording medium storing an image forming control program adjust a position of a belt. Each of the belt controller, the image forming apparatus, the belt controlling method, and the recording medium storing an image forming control program detects a position of the belt and transmits a position detection signal, determines whether a degree of misalignment of the belt is equal to or greater than a specified threshold before the belt starts moving based on the position detection signal, presses the belt to reduce the degree of misalignment of the belt when the degree of misalignment of the belt is equal to or greater than the specified threshold, and performs feedback control to adjust the position of the belt according to the degree of misalignment of the belt after pressing the belt.