Swept shape?

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Robert
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Swept shape?

Unread post by Robert » Fri Mar 18, 2011 6:52 pm

I keep getting a an "Invalid Range" error on two very simple section curves I'm try to extrude. Please see the attached of what I'm try to accomplish. I don't know what I'm doing wrong. Any suggestion would be greatly appreciated.

Thanks
Attachments
swept shape.jpg

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jacs
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Unread post by jacs » Mon Mar 21, 2011 12:01 pm

Hi Robert,

That's a typical case of the swept shape function.
There are 2 important conditions :
- the curve section and the drive line need to intersect (there might be an other way but so far never worked otherwise for me)
- the origin of the curve sections need to be set correctly

Enclosed is a swept shape I made using the same idea than what you are trying to do. I draw only half of the shapes in order to create an intersection between the sections and the drive line. Then I used the Profil/Origin function to set the origin and the orientation of the 2 curve sections the same way (origins are on the intersection point with the drive line). You can draw your shape at this point and play with the different options available (make sure you set the vertical orientation perpendicular to the drive line). I used the coresponding option to match the corners of the first section to the corners of the second section, otherwise the shape is not continuous in this area).
Then use the Shape/Other surface function/Motif to create the complete shape by symetricality).

I attached a few snap shots also, I'm using a french TopSolid and not sure what the corresponding functions are really called. Let me know if you need more explanations.
Feel free to modify my top file if you wish to use it in your design also.
Attachments
Swept shape.top
(75.21 KiB) Downloaded 437 times
ScreenShot1630.jpg
"motif" function
ScreenShot1629.jpg
setting corespondances
Last edited by jacs on Mon Mar 21, 2011 12:10 pm, edited 2 times in total.
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jacs
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Unread post by jacs » Mon Mar 21, 2011 12:03 pm

more snaphots
Attachments
ScreenShot1628.jpg
setting origin of curve section
ScreenShot1627.jpg
final shape
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Unread post by jacs » Mon Mar 21, 2011 12:36 pm

It works well also when the "drive line" is drawn on the side and connects with the 2 section curves.
That way we don't get the lines in the middle of the shape.
Attachments
ScreenShot1631.jpg
Swept shape in one shot with a different directing line
Swept shape.top
(87.73 KiB) Downloaded 534 times
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jeff
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Unread post by jeff » Sat Mar 26, 2011 9:23 pm

Robert perhaps you should try to use a ruled shape for this one
Attachments
ruled shape.zip
(1.64 MiB) Downloaded 434 times

Robert
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Unread post by Robert » Thu Mar 31, 2011 3:35 am

jacs, thanks for the screen shots walking through the steps, that was helpful

Jeff what is a ruled shape?

Robert
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Unread post by Robert » Thu Mar 31, 2011 6:03 am

sorry, it's late and I did not even see your attached AVI video, thanks for the video :D

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