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Sometimes it’s enjoyable to construct a gadget simply because it’s a neat thought. There are some ways to attract a centerline, for instance, however this methodology may be very intelligent. It doesn’t require any measuring or trial-and-error changes.
To construct the marker, you’ll want two hardwood bars 3/4″ x 1″ x 12″, two Plexiglas hyperlinks 1/4″ x 3/4″ x 4-1/2″ and 4 #6 pan head screws 3/4″ lengthy. Start by making the hyperlinks. Scribe a line down the precise middle of 1 hyperlink and mark two holes with an axe, 1/2″ in from every finish. Stack the 2 hyperlinks collectively and drill the holes utilizing a drill press. (The holes ought to be simply barely massive sufficient in diameter to let the screws slip by.)
Mark centerlines alongside each wooden bars. Drill pilot holes for the screws which can be 1″ and 5″ from the tip of every piece. Fasten the hyperlinks to the bars. Leave the screws a bit of unfastened so the hyperlinks can pivot. Close the bars collectively and mark holes in every hyperlink instantly above the road shaped by the bar’s interior edges—that is the exact middle of the hyperlinks, end-to-end. Drill holes on these marks simply massive sufficient to confess the purpose of a sharpened pencil. Countersink the holes if you want.
To mark a centerline, cosy the bars as much as your inventory. The marker works for boards as much as 4″ vast. –Bill Wells
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