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making oval shapes

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Forum topic by 3285jeff posted 11-19-2021 02:01 AM 588 views 0 times favorited 10 replies Add to Favorites Watch
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3285jeff

230 posts in 3050 days


11-19-2021 02:01 AM

i am making or wanting to make a oval top for an end table i am working on,,the table is 24×15so i cut the boards about 18×30 thinking it would give me a little room to play,,,and i watched some you tube videos and i did get the oval made but each side cuts in too soon,, leaving part of each corner knocked off,,,,i guess what i am trying to say is the oval needs to start somewhere past the sides,,if that makes any sense,,lol,,,,this is my first oval and any help would be appreciated,,and i used the string method as seen on you tube


10 replies so far

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CWWoodworking

2311 posts in 1512 days


#1 posted 11-19-2021 02:22 AM

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StevoWevo

64 posts in 181 days


#2 posted 11-19-2021 11:29 AM

I saw this one a while back; https://m.youtube.com/watch?v=PCsmw07sSZg
Not sure how well it works but it looks fun?

View waho6o9's profile

waho6o9

9130 posts in 3910 days


#3 posted 11-19-2021 03:43 PM

Use the major and minor axis and a stick.

This may help:
https://www.lumberjocks.com/topics/44582

View Sylvain's profile

Sylvain

1514 posts in 3832 days


#4 posted 11-22-2021 11:05 AM


i did get the oval made but each side cuts in too soon,, leaving part of each corner knocked off,,,,i guess what i am trying to say is the oval needs to start somewhere past the sides,,if that makes any sense,,lol,

- 3285jeff


I am not sure I understand; but then English is not my mother language.
Which side, which corner ? (on something continuously curved)
maybe a picture would help.

Do you mean the oval top doesn’t completely cover the rectangular base (feet and aprons)?

The more the focal points are spaced, the more the oval is elongated.
The less the focal points are spaced, the more the oval is like a circle.

- choose the focal points separated by a A spacing;
- adjust the rope length to have the desired overhang at the corner;
- assess the lateral and longitudinal overhang.

If the lateral overhang is significantly greater than the longitudinal one, try again with a wider A spacing after adjusting the rope length to still get the desired corner overhang.

If the lateral overhang is significantly smaller than the longitudinal one, try again with a narrower A spacing after adjusting the rope length to still get the desired corner overhang.

Rinse and repeat until you are satisfied with the three overhang.
The final lateral and longitudinal overhang will allow you to determine the minor and major axis if you need them (depending on how you cut the top).

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn (and that is nice)

View Lazyman's profile

Lazyman

8781 posts in 2720 days


#5 posted 11-22-2021 12:11 PM

If you want an ellipse and not an elongated circle (2 semi circles joined by a straight section—think round table with a leaf added), an ellipse jig is an easy way to cut out an ellipse with a router. The same jig can be used to cut 2 semi circles as well, though you can make a router circle jig (trammel) easily with a scrap of plywood.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

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Sylvain

1514 posts in 3832 days


#6 posted 11-22-2021 05:01 PM

strictly speaking, an oval is not an ellipse.
https://en.wikipedia.org/wiki/Oval

25X15; I guess those are inches.
I would cut it by hand or with the bandsaw 1/16 or 1/32 bigger and bring it to final dimension with a plane, a spokeshave or a Shinto rasp; using a fine metal file to finish the edge

Look here how to make a rounded (stool)top:
https://www.youtube.com/watch?v=MK1e4lb2Dp0

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn (and that is nice)

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Sylvain

1514 posts in 3832 days


#7 posted 11-27-2021 08:45 AM



i am making or wanting to make a oval top for an end table[...]and i did get the oval made but each side cuts in too soon,, leaving part of each corner knocked off,,[...] any help would be appreciated, i used the string method as seen on you tube

- 3285jeff

The commenters would appreciate to know if they have been of any help.

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn (and that is nice)

View AlaskaGuy's profile

AlaskaGuy

6827 posts in 3642 days


#8 posted 11-27-2021 07:09 PM

And then there is the string method.

https://youtu.be/Et3OdzEGX_w

-- Alaskan's for Global warming!

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AlaskaGuy

6827 posts in 3642 days


#9 posted 11-27-2021 07:13 PM

And then you can draw it out in sketch up or any cad program print it and take it to Kinko’s who Is Now FedEx Office have it enlarged and printed again in the lager size.

-- Alaskan's for Global warming!

View Sylvain's profile

Sylvain

1514 posts in 3832 days


#10 posted 11-28-2021 03:07 PM


And then there is the string method.
https://youtu.be/Et3OdzEGX_w
- AlaskaGuy

great link
the other videos are also nice:
https://www.youtube.com/channel/UCrr1JBCRZDGktVIUI8i0giw/videos

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn (and that is nice)

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