cutting table top

i would like to cut bean and boomerang shape tables out of 3/4 inch. plywood.ive been told a router will not do this on one cut with a jig & using a band saw to smoo9thly cut a continious curve is difficult.any input on how you would do this would be greatly appreciated.
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snipped-for-privacy@yahoo.com wrote:

A router can do it in one cut if you do it this way.
Make a pattern out of hardboard or plywood Trace onto your 3/4 ply Cut out freehand on a bandsaw or with jigsaw leaving the line Attach pattern to your 3/4 using screws or double-stick tape Use a pattern cutting bit in your router to make the finish cut
OR
Attach pattern to your 3/4 with screws or double-stick tape Make 3 passes with your router taking ~1/4 at a time This method requires a thicker pattern
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On 10 Jan 2007 06:43:18 -0800, snipped-for-privacy@yahoo.com wrote:

Make a hardwood template where the router bit bearing will ride. Cut the shape on a jig or bandsaw such that only 1/8" will be trimmed with the router. A 1/2" shank bit is better than a 1/4".
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snipped-for-privacy@yahoo.com wrote:

here are some things to read to get you going in the right direction:
<http://patwarner.com/templates.html <http://www.diynetwork.com/diy/hi_tools/article/0,2037,DIY_13936_3207650,00.html <http://www.rusticgirls.com/Tools/routers-4.html <http://www.woodnet.net/tips/routing/using-templates/
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snipped-for-privacy@yahoo.com wrote:
> i would like to cut bean and boomerang shape tables out of 3/4 inch. > plywood.ive been told a router will not do this on one cut with a jig & > using a band saw to smoo9thly cut a continious curve is difficult.any > input on how you would do this would be greatly appreciated.
1) Some 1/4" hardboard for patterns, a router with a 3/4" pattern bit, and a saber saw with a 10TPI, bi-metal blade.
2) Make templates.
3) Trace template on 3/4 material, remove template, then cut 1/4" proud with saber saw.
4) Replace template, clean up with router.
5) Get a beer and critique your work.
Have fun.
Lew
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Yes, you want to make a template that can be followed by a router with a pattern bit. Cut the wod to within 1/8 of the final shape by hand first then use the template and trim to final shape. If you
If your shapes can be described as true arcs with ogee intersections then you can create a very accurate template by laying out the radius centers and using a router circle cutting jig to cut the template. I like using MDF for templates. It is real easy to cut and shape but it will wear out if used a lot.
If you have elipses or can't setup a router with a circle jig then you can use a trammel and ships curve to layout and draw the shape for the template. If you use this method and free hand cutting with bandsaw, handsaw, etc. then you should cut just outside the lines and sand down to the line using power sanders like an oscillating spindle sander, belt sander, edge sander, belt sander or what ever you have on hand.
Not much description on actual process for router circle cutter or trammel written here but you can research them eleswhere terms.
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