Re: [CAD_CAM_EDM_DRO] Re: Newbie: Machining an oval?

Actually, a standard oval is generated from a diamond shape. to do it by hand,
(use the same method for cad) Use a 60 degree triangle to make your diamond
shape. In CAD, you can use copy-rotate on a line. Assuming the longest part is
oriented vertically, draw a pair of lines from the intersection on the left, to
the center points of the two lines on the right, and vice versa. From the point
where these lines cross in the upper half, draw an upwards going arc through the
center points of the upper side lines of the diamond, and a downwards going arc
in the bottom half. Then from the two side points draw an arc through the
centerpoints of the opposite sides of the diamond. Erase/delete the diamond and
intersecting lines, and you have a classic oval.

Bill

On Sat May 17 07:24:37 2003 turbulatordude wrote:

>Hi George,
>
>unfortunatly, no.
>
>I did a CAD layout on an elipse broke it into quarters and then laid
>3 circles over one quarter. I was very happy to find that the offset
>from an arc to the elipse was withing a few thou, much better than my
>requirements for that project.
>
>For an elipse, you need to break up the curves into point to point
>steps. the more steps the closer to a perfect ellipse you will get.
>but for most software , each step will be a ramp up, and down and
>stop. to the milling will be very slow.
>
>Back to an oval. An oval is 2 circles and 2 lines connecting. just
>determine your circle center points and cut one half circle, one
>straight, the other have circle and the remaining straight.
>
>seems like a very few lines of code.
>
>Dave
>
>
>
>
>
>--- In CAD_CAM_EDM_DRO@yahoogroups.com, "gglines1" <gglines@c...>
>wrote:
>> Can the G02/G03 commands be used to machine an oval tool path?
>>
>> Thanks,
>>
>> George
>
>
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