Help needed with fillet tube frame intersections  1-20  21-31

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 From:  nycL45
3150.1 
I tried to fillet the connections without success. I tried open end tube to tube surface and open tube to booled hole. The lower end of the encirled piece is the last attempt; there is a booled hole under the vertical piece.

Leonard

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 From:  Frenchy Pilou (PILOU)
3150.2 In reply to 3150.1 
Like this ?

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 From:  nycL45
3150.3 In reply to 3150.2 
So, that is how it is done. I understand.

Thanks, Pilou.
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 From:  Michael Gibson
3150.4 In reply to 3150.3 
Hi Leonard, yeah usually you need to get the pieces combined together into one single solid and then you fillet the edges of that solid.

Check out the sunburst and six-legged pod video tutorials here:
http://moi3d.com/1.0/docs/tutorials.htm

They go through the steps of building some separate pieces and then combining them together into a solid and filleting the edges.

Unfortunately you are going to have difficulty filleting this one here:



because the "seam edge" of the tube is so close to the edge you want to fillet - one of the major current limitations in MoI's filleting mechanism is that it will not make a fillet that crosses an edge like that, you can only go up to it and not over it.

So for example that edge will only be filletable up to 0.2 inches, not larger.

If you need to go larger than that, if you could post your original curves you used to make the frame I could probably help you with that by adjusting the circle's position to make the resulting seam edge be in a better place.

- Michael

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 From:  nycL45
3150.5 In reply to 3150.4 
Hi Michael,

Aha. I am stuck there. I thought I had a gap in the curve even though there was a "Closed Crv" indication.

The file is attached.

Leonard

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 From:  Michael Gibson
3150.6 In reply to 3150.5 
Hi Leonard, give the attached model a try, it is all set up for filleting now.

I just rotated your circle by 180 degrees before sweeping it, to get the seam edge out of the way and then used Boolean Union to make it into one solid.

If you want to fillet all edges you can just select the entire piece (with just one click to give it "whole object" selection), you don't need to select each edge individually if you want to do them all.

You still can't use a very large radius though because only a certain size will fit into that area, too large and it would kind of start to have to wrap around the tube.

So for example here is at 0.03 inches:



You can possibly go a little higher than that, but not too much.

- Michael

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 From:  Frenchy Pilou (PILOU)
3150.7 
As the model is symmetric, it is not a good strategy to cut it in half and make a mirror at the end?
Here there are not a lot of fillets but if they are numerous?
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 From:  Michael Gibson
3150.8 In reply to 3150.7 
Hi Pilou, yeah it is good to only model half when possible.

But if the model is fairly simple it does not make that much difference.

- Michael
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 From:  BurrMan
3150.9 In reply to 3150.6 
>>>>You still can't use a very large radius though because only a certain size will fit into that area, too large and it would kind of start to have to wrap around the tube.

But if you do want a very radical "filet", dont forget "Blend" from the MoI reference.



EDITED: 19 Jun 2012 by BURRMAN

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 From:  nycL45
3150.10 In reply to 3150.6 
Michael, that looks good and rotating the circle and the "whole object" selection are helpful tips. The radius is a little less than a 1/32nd of an inch which is kind of small.

It is probably outside the objectives of Moi3D, but I will ask anyway. Is there a possibility of a weld-like fillet (without the texture) in a future version?

Thanks. Now to try your handiwork.

Leonard
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 From:  nycL45
3150.11 In reply to 3150.7 
Good point, Pilou. C4D has mirror issues and I naturally shy from mirroring. I will give Moi's a try. –L.
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 From:  Michael Gibson
3150.12 In reply to 3150.10 
Hi Leonard,

> Is there a possibility of a weld-like fillet (without the texture)
> in a future version?

I'm not sure.... Do you have a description or some images of what that would be like?

My guess though is that may not be part of the regular CAD toolset though, so it probably would require some custom work to make it happen and fillets are a particularly difficult area to mess around with.

- Michael
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 From:  nycL45
3150.13 In reply to 3150.9 
I think that is "extreme filleting", BurrMan. ;-) The Blend tool is really impressive. –L.
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 From:  DannyT (DANTAS)
3150.14 In reply to 3150.10 
Hi Leonard,

> Is there a possibility of a weld-like fillet (without the texture) in a future version?

I don't know if your aware of the fillet options in V2 but there is a 'Constant' fillet option, which I think represents how a weld would look like without the texture.






Cheers
~Danny~

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 From:  BurrMan
3150.15 In reply to 3150.14 
WHat about "Inverting the filet" so it's a bead instead of a radius.
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 From:  BurrMan
3150.16 In reply to 3150.15 
A really nice tig weld would probably look like a filet. I would imagine an arc weld to look like this more often than not:




It was fairly easy to make though. I just ran a normal filet with the radius I wanted, then I copied the little filets seam edge and deleted the filet. Then I pasted the seam edge back and rotated it with MoI's edit frame rotation widget, 180 degrees, and swept it with the 2 newly calculated surface edges from the filet. Poof....Bead. But if it was possible to invert the filet as another option, I think it may be a nice addition to that list.

Does anybody else envision a weld bead as this shape?

EDITED: 19 Jun 2012 by BURRMAN

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 From:  DannyT (DANTAS)
3150.17 In reply to 3150.16 
Hi Burr,

> Does anybody else envision a weld bead as this shape?

I just Googled Images for 'tube weld' and got these.........

http://www.bikesportmichigan.com/reviews/blade05/lg/bladeseatmast.JPG

http://gallery.mtbr.com/data/mtbr/515/234452TiHeadTubeWelds1.JPG

http://www.penguincycles.com/fab/fab_weld1.JPG

Closer to a constant fillet, I think :)

[EDIT] Or this beauty........ http://dana60.com/sceep/sob/booger4.jpg ......model that!!!


Cheers
~Danny~
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 From:  Michael Gibson
3150.18 In reply to 3150.16 
Hi Burr,

> But if it was possible to invert the filet as another option,
> I think it may be a nice addition to that list.

I don't think it is currently supported by the geometry library...

It seems like it would be an unusual option, have you seen it before in any other CAD program? I don't think that would normally be explicitly modeled in a CAD design.

I'm also not quite sure exactly how the bead would be constructed - with a Fillet it is clear that the fillet surface that is generated is tangent to the places where it connects.

The bead you show does not seem to be either tangent or opposite of tangent, I guess maybe 90 degrees perpendicular to the adjoining surfaces?

- Michael
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 From:  DannyT (DANTAS)
3150.19 In reply to 3150.18 
Hi Michael,

> I don't think that would normally be explicitly modeled in a CAD design.

That's correct, it's usually symbolized on the 2d detail drawing, I have never seen a weld modeled for engineering purposes.
For realistic rendering maybe.

Michael, on another note, is it possible for chamfer to have 'Constant' distance?
It came up from this post, if you have a shaft cut on an angle and chamfer the angled end it in real life, the chamfer would be constant, MoI produces a non constant chamfer in this situation.

-
~Danny~
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 From:  Michael Gibson
3150.20 In reply to 3150.19 
Hi Danny,

> Michael, on another note, is it possible for chamfer
> to have 'Constant' distance?

I don't think that it is possible to have that with 2 chamfer distances specified...

Right now the way chamfer works, having 1 distance is the same as having 2 distances specified with equal values in them.

- Michael
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