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3 point arc not lining up geometrically

alexander_paskalexander_pask Member Posts: 2

Hi all,

So I'm currently trying to build a cup holder of sorts but it needs to have a "slot" cut in to fit the thing I want to hold. I'm going to be completely honest when I say I'm not that familiar with cad but thought this would be relatively easy with a three point arc. The thing I want to store is about 2-3/4 in in diameter or just under 70mm. I've chosen to make a "circle" with a radius of 35.1 for some "wiggle room" as it needs to fit nice and cosy. despite starting the arc in the corners of the holder and drawing a line 35.1mm from the center point, my diameter is not 70.2mm like I had hoped. What am I doing wrong?

Thanks.

This is the file;

https://cad.onshape.com/documents/ba9619d4a4d25fb79198921a/w/ae2d3b897d4f12d3737f9f57/e/f774a35144a0ecd4461658fa

Comments

  • glen_dewsburyglen_dewsbury Member Posts: 782 ✭✭✭✭

    Your link is not public and can't be viewed.

  • rick_randallrick_randall Member Posts: 330 ✭✭✭

    Have you searched the "help" for, 3 point arc? Nice little video in there.

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