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Reticle Perpendicularity by Darrell Holland
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<blockquote data-quote="fj40mojo" data-source="post: 317875" data-attributes="member: 19129"><p>From the linked site:</p><p></p><p></p><p></p><p>It may sound complicated but it is undoubtedly more accurate than this gizmo. With my method I'm using precision ground tools (1-2-3 blocks) to support the barrelled action parallel to a reference surface and using the same surface to reference my vertical crosshair again with a precision ground tool (machinist square). If I wanted to get really anal about it I'd use a surface plate as the support surface, but I think this might be overkill. The goal here is to elliminate as many variables as possible and make your initial set up as accurate as possible. The only variable left in my set up is how well I can visually align that vertical crosshair with the edge of the square. The only way I can figure to do it more accurately would be to set it up on an optical comparitor which isn't an uncommon tool in a tool and die shop, but not something I have in my machinist box.</p><p></p><p></p><p><a href="http://www.use-enco.com/CGI/INSRIT?PMAKA=630-4005&PMPXNO=949859&PARTPG=INLMK3" target="_blank">Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies</a></p><p></p><p><a href="http://www.use-enco.com/CGI/INSRIT?PMAKA=827-9360&PMPXNO=2859541&PARTPG=INSRHI" target="_blank">Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies</a></p><p></p><p><a href="http://www.use-enco.com/CGI/INSRIT?PARTPG=INSRAR2&PMAKA=638-7723&PMPXNO=945804" target="_blank">Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies</a></p></blockquote><p></p>
[QUOTE="fj40mojo, post: 317875, member: 19129"] From the linked site: It may sound complicated but it is undoubtedly more accurate than this gizmo. With my method I'm using precision ground tools (1-2-3 blocks) to support the barrelled action parallel to a reference surface and using the same surface to reference my vertical crosshair again with a precision ground tool (machinist square). If I wanted to get really anal about it I'd use a surface plate as the support surface, but I think this might be overkill. The goal here is to elliminate as many variables as possible and make your initial set up as accurate as possible. The only variable left in my set up is how well I can visually align that vertical crosshair with the edge of the square. The only way I can figure to do it more accurately would be to set it up on an optical comparitor which isn't an uncommon tool in a tool and die shop, but not something I have in my machinist box. [url=http://www.use-enco.com/CGI/INSRIT?PMAKA=630-4005&PMPXNO=949859&PARTPG=INLMK3]Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies[/url] [url=http://www.use-enco.com/CGI/INSRIT?PMAKA=827-9360&PMPXNO=2859541&PARTPG=INSRHI]Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies[/url] [url=http://www.use-enco.com/CGI/INSRIT?PARTPG=INSRAR2&PMAKA=638-7723&PMPXNO=945804]Enco - Guaranteed Lowest Prices on Machinery, Tools and Shop Supplies[/url] [/QUOTE]
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Reticle Perpendicularity by Darrell Holland
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