Sorry to ask but this is driving me mad!

[steve]

I have created a curved part with an elliptical hole in it. I have projected the hole onto tangent plain (capture 1). I then offset the ellipse and projected it back onto the part as a boundary patch . The edge has then been chamfered (capture 2 - half section).

The outside edge appears not to be touching the surface it was projected onto (captue 3 - close up half section). Is this an error in creation on my part or is it just a graphics error. I have tried turning the chamfer off - no change.

I have converted the part to a high res stl file for 3d printing but the error still appears.

Any thoughts on another way to achieve this construction?

Many thanks for any assistance.

[mikejones]

Please attached the ipt file as it will be easier to see what is going wrong for you.

Mike

[steve]

Thanks for looking into his form me.

[mikejones · Accepted solution]

Try this one out. I created an offset surface 0mm off the outer profile before putting the hole in. Then using the offset sketch you created, trim the offset surface back and thicken as normal.

[JDMather]

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@steve wrote:

 Is this an error in creation on my part or is it just a graphics error.

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It is an error in the way that you created the part.
(And did you intend to create Thicken33 as a New Solid?)

Frankly, I would use what you learned from this attempt and start over.

I would not use Shell (or at least not at the time you did) and I would probably not use an Delete Face features.

I suspect the construction of the model could be simplified by a factor of 2/3 of the features.

[j.palmeL29YX]

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@JDMather wrote:

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It is an error in the way that you created the part.

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Which model are you guys (@mikejones,  @JDMather )  talking about? If I open the GLB-001_Ball section.ipt I see only a derived part without any history? What I'm doing wrong?

[steve]

Thanks that has work perfectly!

[steve]

Thanks JD

Its all about the learning. Mike has fixed the issue for me. I will try again when I'm not in a time crunch.

[mikejones]

 j.palmeL29YX this is a 2021 model so I'm guessing you're opening in 2020 or possibly 2019 if you're getting the derived part version.

Mike

[j.palmeL29YX]

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@mikejones wrote:

 ... this is a 2021 model ...

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My first analyse told me "created with 2020" - but now with a closer look I see: "last updated with 2021" .

My apology for the unnecessary question and thank you for your friendly response.