Pivotable Fence Stop Assembly for Precision Woodworking
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Solution Overview
Problem
Conventional tools for repeatable operations in woodworking and metalworking, such as crosscutting multiple workpieces to the same length, are often inaccurate, inconsistent, and inefficient.
Innovation Solution
A fence and stop assembly system with a pivotable stop portion that can be adjusted linearly and locked into position along a track, allowing for precise engagement and fine-tuning of workpieces, enhancing accuracy and consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional tools are used for repeatable operations, then the process is simpler, but the accuracy and consistency deteriorate
Solution Approach 1:
The stop assembly is divided into multiple functional segments: a positioning mechanism for coarse adjustment along the track, a pivotable stop portion for engagement, and a fine-adjustment assembly for precise positioning. This segmentation allows each component to specialize in a specific adjustment range, achieving high overall precision without excessive complexity.
Solution Approach 2:
The stop portion is designed to be pivotable about a pivot axis, transitioning between engaged and disengaged positions. This dynamic element allows the stop to be easily positioned against workpieces for accurate stopping while maintaining ease of operation. The fine-adjustment assembly also provides dynamic linear adjustment capability along the track direction.
2Manufacturing precision
If conventional tools are used for repeatable operations, then the setup is faster, but the consistency deteriorates
Solution Approach 1:
The stop assembly can be pre-positioned at desired locations along the track using the fine-adjustment assembly before production begins. Once positioned, the locking assembly secures the stop in place, eliminating the need for repeated adjustments during operation. This preliminary setup ensures consistent stopping positions across multiple workpieces while reducing operational time.
Solution Approach 2:
The system incorporates measurement markings on the track and stop assembly that provide visual feedback for positioning. This allows operators to quickly and accurately set the stop at predetermined locations, ensuring consistency across repeatable operations without requiring complex measurement procedures during each operation.
3Productivity
If conventional tools are used, then the device is simpler, but the efficiency deteriorates
Solution Approach 1:
The stop assembly is designed to perform multiple functions: coarse positioning along the track, fine-adjustment for precise positioning, locking to secure the position, and pivoting for engagement and disengagement. This multi-functionality is achieved through an integrated design where the fine-adjustment assembly operates independently of the locking mechanism, allowing both functions to be utilized simultaneously for maximum efficiency without proportionally increasing complexity.
Solution Approach 2:
The fine-adjustment assembly acts as an intermediary mechanism between the coarse positioning track and the final stop position. It provides a mechanical advantage through its threaded or rack-and-pinion design, allowing precise linear adjustment with minimal input force. This intermediary mechanism enables efficient fine-tuning of the stop position without requiring complex electronic or automated systems.
Data Source
AI summary
A stop assembly may include a first portion configured to selectively operably engage a track of a tool and a stop portion operably engaged with the first portion configured to releasably engage a workpiece. The stop portion may be pivotable between a disengaged position and an engaged position relative to the first portion. The stop portion may move in a rotational direction toward the first portion when moving from the disengaged position to the engaged position. A method of use may include pivoting a stop portion of a stop assembly, about a pivot axis defined by a pivot shaft of the stop assembly, to an engaged position such that the stop portion moves in a rotational direction toward a first portion of the stop assembly.