Creative Woodworks & crafts 2002-08, страница 59
This cross with ivy entwined background is another nice challenge for scroll saw enthusiasts. We made our cross and base from 1/4" thick material and the ivy from 1/8" thick contrasting material. Note: thicker materials can be used if desired. This would be advantageous for assembly as more surface contact would occur between the base and upright pieces.
The ivy is delicate and fragile (especially when made from 1/8" material). To add extra support and to help prevent breakage while sawing, here are a few tips:
1. Try stack sawing the pieces. More layers mean more strength of material, which adds extrc support to the thin, fragile areas.
2. Replace the waste areas. Some cutout areas can be reinserted into delicate areas and held in place with tape for added support.
3. Use an auxiliary saw table. If your scroll saw has a large opening in the table arouna the blade, make a zero-clear-ance insert from a business card or playing card. This will help prevent small parts from breaking off as the blade passes down through the wood while sawing.
4. Use a pencil (eraser end) to hold down delicate pieces very close to the blade. This prevents breakage as the blade travels upward through the wood. It also keeps your fingers away from the blade.
5. And last, but not least, select a smeller scroll saw blade, probably a No. 2 or 3 and no higher than a No. 5. If you experience any problems with a reverse tooth type blade "lifting" the workpiece, switch to a regular skip tooth or double tooth blade. Also, slow down the saw's speed a little bit... and don't rush or crowd the wood into the blade!
With that said, let's make the project!
Adhere the patterns to the wood with spray adhesive. Bore blade entry holes and make all cuts, beginning with the interior and working toward the perimeter. Note: if you choose to drill the l-3/8"-Dia. clock mounting hole with a Fortsner bit, bore it first. Furthermore, the cross has been designed to utilize a 1 -7/16"-Dia. "angel" clock insert which is supplied with a rubber gasket to hold it snugly inside a 1-3/8"-Dia. mounting hole. To eliminate the need for this gasket, saw along the inside edge of the bold cutting line shown on the pattern. This will produce an approximate 34mm-Dia. hole. If you prefer to bore the hole with a 1-3/8"-Dia. Forstner bit, or if the scroll sawn hole fits too loosely, the rubber gasket can be used to securely mount the clock insert.
Remove patterns and touch up any imperfections with needle files, sandpaper, etc.
Pre-drill a pilot hole into the bottom of the cross. This will prevent the wood from splitting when the wood screw, used for securing the cross to the base, is later installed.
Glue the ivy to the back of the cross, making sure that the bottom of both pieces are flusn to ensure proper mounting on the base.
Glue the three base blocks together. Drill a mounting hole for the No. 6x1" wood screw to pass through all three blocks and 1 /4" into the center of the bottom of the cross. Countersink screw heaC on bottom of base. Note: if using thicker material than listed in supplies, use an appropriate size and length wood screw.
Finish as desired and insert clock. And that's all there is to it!
National '""'" §| Artcraft Co. §f|
Wood: wood of choice—one piece 1/4" x 4-3/4" x 6-3/4" (for the cross], one piece 1/4" x 3-1/4" x 6-1/2" (for base block A), one piece 1/4" x 2-1/4" x 5-1 /2" (for base block B), one piece 1 /4" x 1 -1 /4" x 4-1/2" (for base block C); contrasting wood of choice—one piece 1 /8" x 5-1 /2" x 6-1/2" (for the ivy) Tools: scroll saw with assorted blades; drill with bits including a l-3/8"-Dia. Forstner bit (optional) and a countersink bit; needle files Temporary-bond spray adhesive Sandpaper, assorted grits No. 6x1" wood screw Wood glue Finish of choice 1-7/16"-Dia. angel clock insert* *Available from The Art Factory, P.O. Box 70 L Platteville, W! 53818; 1-800-566-6394.