Worktop Jig Alignment for Accurate Mason's Mitre Cuts
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Solution Overview
Problem
Forming complementary cuts in male and female workpieces for a Mason's Mitre joint is complicated, leading to misalignment and unsatisfactory finishes, particularly in out-of-square arrangements, resulting in costly scrapping of workpieces.
Innovation Solution
A jig alignment device with an engagement edge and an alignment indicator spaced perpendicularly from the engagement edge, allowing accurate positioning of the jig relative to a reference line on the workpiece, ensuring correct alignment of cuts regardless of the angle between adjacent walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional routing jigs are used to form Mason's Mitre joints, then cuts can be made in workpieces, but alignment accuracy deteriorates leading to misalignment and unsatisfactory finishes
Solution Approach 1:
The patent introduces an alignment indicator as an intermediary element between the jig and the workpiece. This indicator serves as a mediator that transfers alignment information from the jig's engagement edge to the workpiece reference line, enabling precise alignment without direct complex mechanical constraints. The alignment indicator spaced perpendicularly from the engagement edge acts as a visual or physical reference that mediates the alignment process, resolving the contradiction between achieving accurate cuts and maintaining reliable joint finishes.
2Measurement precision
If jigs are positioned without precise alignment indicators, then the setup process is simpler, but alignment precision deteriorates resulting in gaps between workpieces
Solution Approach 1:
The alignment device is segmented into distinct functional elements: an engagement edge for engaging the jig's guiding edge, and a separately spaced alignment indicator. This segmentation allows each element to perform its specific function independently - the engagement edge provides mechanical constraint while the alignment indicator provides precise positioning reference. By dividing the alignment function into these separate components, the device achieves high measurement precision without requiring a monolithic complex structure.
3Measurement precision
If alignment indicators are placed close to engagement edges, then the device structure is more compact, but alignment precision deteriorates due to insufficient spacing for accurate reference
Solution Approach 1:
The alignment indicator is positioned in a dimension perpendicular to the engagement edge rather than along the edge itself. This dimensional transition creates sufficient spacing for accurate alignment reference while maintaining overall device compactness. By moving the indicator to a perpendicular dimension, the device achieves both precise measurement capability and space efficiency, as the indicator can be spaced optimally without increasing the device's primary dimensional footprint.
Data Source
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AI summary
The disclosure relates to a device 1, 101 for aligning a jig 20 with a workpiece to be cut, the device 1, 101 comprising an engagement edge 2, 102 for engaging with a guiding edge 26 of a jig 20, in use, and an alignment indicator 6, 106 spaced from the engagement edge 2, 102 by a predetermined distance. The disclosure further relates to a jig 20 comprising a device 1, 101 having an alignment indicator 6, 106 spaced from a guiding edge 26 of the jig 20 by a predetermined distance. The disclosure further relates to an alignment system and method of forming a cut on a workpiece.