topic Betreff: Can't use a "closed" 3d surface for a loft or an extrusion. in Fusion Design, Validate & Document Forum

Can't use a "closed" 3d surface for a loft or an extrusion.

Anonymous — Sat, 06 Jul 2019 23:51:13 GMT

I am trying to create a raised 6 pointed wavy star. (See the straight 5 sided star for comparison.)

I can't select the elements of the wavy ridge described in the 3d sketch so the loft cannot complete. What is the best way to complete my model?

Thank you for your help

-Robert Stickney

2d drawing of the estoiletrying to create a loft with a ray and the center lineHere is the "closed" 3d sketche of the center ridge of the ray.5 sided straight ray star that has the center ridges that I want in the estwal designHere is the loft from the base surface to the ridge surface (current selected as gray).

Re: Can't use a "closed" 3d surface for a loft or an extrusion.

davebYYPCU — Sun, 07 Jul 2019 01:32:17 GMT

Will be 2 Patch Lofts, before a 6 x Circular pattern, then work to make solid..

Divide the job into smaller segments, for this leg a top and bottom inclined face.

First the highlighted curves need a height / lift at the centre point of the star.

Same as the straight vertical line in the five pointer.

Then it is a Loft to point, from 1 to 2, with 3 and 4 as rails. Same for the top.

Then the arms can be patterned, stitched and boundary fill will make the solid.

Will need the file for closer look at the 3d sketches.

Might help.....

Re: Can't use a "closed" 3d surface for a loft or an extrusion.

davebYYPCU — Sun, 07 Jul 2019 04:06:19 GMT

Just quick update,

Loft was not working due to the curved wave, making for a fold under, so went with Patch > Patch, with no need for the point number 2, as above.

Might help...

Betreff: Can't use a "closed" 3d surface for a loft or an extrusion.

g-andresen — Sun, 07 Jul 2019 08:23:14 GMT

Hi,

Here's a simple solution.

star lofted
Whether it meets your requirements is up to you.
The endpoint of the loft can be varied between sharp and tangential and the profile can be changed by moving the spline points.
günther

Re: Can't use a "closed" 3d surface for a loft or an extrusion.

TrippyLighting — Sun, 07 Jul 2019 10:42:29 GMT

Kudos to to the OP. First post and a proper description with plenty of large explanatory screenshots!

Refreshing!

Re: Can't use a "closed" 3d surface for a loft or an extrusion.

chrisplyler — Sun, 07 Jul 2019 14:30:11 GMT

Kudos to @TrippyLighting for giving kudos to the OP.

Betreff: Can't use a "closed" 3d surface for a loft or an extrusion.

chrisplyler — Sun, 07 Jul 2019 14:34:55 GMT

@g-andresen that is a fantastic method. But, why didn't you just build it on the Origin instead of making a separate axis?

Re: Can't use a "closed" 3d surface for a loft or an extrusion.

TheCADWhisperer — Sun, 07 Jul 2019 14:38:57 GMT

@Anonymous wrote:
What is the best way to complete my model?

Can you File>Export and then Attach your *.f3d file here?

Betreff: Can't use a "closed" 3d surface for a loft or an extrusion.

g-andresen — Sun, 07 Jul 2019 16:24:38 GMT

Hi Chris,

This could not be done differently because the cursor refused to start at the origin again.
Such it is in live sometimes.

günther

Betreff: Can't use a "closed" 3d surface for a loft or an extrusion.

chrisplyler — Mon, 08 Jul 2019 12:25:36 GMT

Do you mean that clicking on the Origin did not automatically snap a Coincident restraint into place? That's weird, sure, but you could still manually add it after you place your first line/spline/whatever.