Transport System Carriage Position Correction
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Solution Overview
Problem
In existing carriage transport systems, accurately stopping a carriage at a desired target position is challenging due to motion errors, and changing the stop position to accommodate different transport objects is difficult without updating position correction data.
Innovation Solution
A transport system with a control unit that adjusts drive instructions during carriage motion, using a network of lower-level and higher-level control units to correct the carriage's position and store motion errors for specific workpiece positions, allowing for precise stopping and adaptation to different objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If position correction data is pre-stored in each transport carriage for motion error correction, then stopping accuracy at target position is improved, but adaptability to different transport objects and position shifts is worsened
Solution Approach 1:
The patent applies dynamics by making the correction data structure flexible and adaptable. Instead of fixed pre-stored correction data for each carriage, the system uses correction data that can be dynamically selected and applied based on the actual transport object and its position characteristics. The correction data is associated with multiple particular positions and can be selectively applied during carriage motion to accommodate different transport objects while maintaining high stopping accuracy.
Solution Approach 2:
The patent changes parameters by storing multiple sets of correction data corresponding to different particular positions of workpieces. The system can switch between different correction data sets based on the actual position of the transport object, thereby adapting to position shifts and different object types without requiring physical reconfiguration of the carriages.
2Manufacturing precision
If motion error correction is performed on each carriage with pre-stored data, then stopping precision is improved, but operational flexibility for changing stop positions is worsened
Solution Approach 1:
The patent applies universality by creating a centralized correction data management system that serves multiple carriages and multiple workpiece types. The correction data is stored in a location accessible to all carriages and can be universally applied to different transport objects. This allows the same correction data infrastructure to support both high precision stopping and operational flexibility for changing stop positions across the entire transport system.
Solution Approach 2:
The system uses feedback by monitoring the actual position of transport objects and selecting appropriate correction data based on measured position deviations. The correction data application is dynamically adjusted based on feedback about the actual transport scenario, allowing the system to maintain precision while adapting to different operational requirements.
3Adaptability or versatility
If position correction data is updated for each transport object type, then adaptability to different objects is improved, but system complexity and data management burden are worsened
Solution Approach 1:
The patent applies segmentation by dividing correction data into discrete sets associated with specific particular positions of workpieces. Each correction data set is independently stored and can be selectively applied based on the actual transport scenario. This segmentation allows the system to handle multiple object types without requiring a complete reconfiguration of correction data, reducing management complexity while maintaining adaptability.
Data Source
AI summary
An embodiment includes a plurality of transport modules forming a transport path on which a carriage that transports a workpiece travels, and a control unit that controls a position of the carriage on the plurality of transport modules based on a drive instruction, and the control unit corrects the drive instruction during carriage motion that is based on the drive instruction and stops the carriage.