35 - Revolving Tool Station, страница 30

JIGS & ACCESSORIES

Clamping System

With the base assembled, you can turn your attention to the clamping system. It consists of two cams attached to blocks that slide in the groove in the base, see Fig. 5.

CAMS. The cams (G) are nothing more than ³/4"-thick pieces of hardwood that are shaped like a large whistle, see pattern. The shape of the cams is designed to provide increasing pressure as you tighten them against the frame.

blocks. To raise the cams so they're centered on the thickness of the frames, each one is attached to a hardwood mounting block (H), see Figs. 5 and 5a.

A rabbet along one edge of the block fits under the lip of the fixed platform, see Fig. 5a. This keeps the assembly locked in the groove as you tighten the cams. After cutting the rabbet, you can attach each cam with a machine screw and a lock nut that rests in a counter-bored hole in the block, see Fig. 5.

finish. Finally, finish the jig with a couple coats of varnish. This way, when the glue squeezes out, the frame won't stick to the jig. ^

Using The Jig

FIRST: —

ALIGN EDGE OF FRAME WITH FIXED PLATFORM

SECOND:

SLIDE ADJUSTABLE PLATFORM AGAINST FRAME AND SCREW IN PLACE

17o set up the jig.. position the frame so the edge of the stile aligns with the fixed platform. Then, slide the adjustable platform against the frame and screw it in place.

THIRD: glue up frame

AROUND PANEL AND SET IT IN PLACE

FOURTH

CENTER CAMS ON RAILS AND TIGHTEN THEM IN PLACE

2 After assembling the door, place it against the cleats and slide the cams in place. With the cams centered on the rails, tighten them against the frame.

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ShopNotes

No. 35