I'm scratching my head on this one

Next
 From:  twofoot
4085.1 
Hi folks. Perhaps I am "in too deep" to see the obvious solution, but I am sure it is waiting to be found. So... I'll ask the group if anyone can figure this out and prod me in the right direction.

I've attached the DWG file I am working from, along with the Moi file I have done so far. For the life of me, I cannot figure out how to sweep/extrude/force the spokes of the wheel to be created using the proper outline.

Any suggestions?

Thanks!

Chris



  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  twofoot
4085.2 
I almost forgot this file. I used Rhino to translate the DWG into a 3DM file for Moi.

C.

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  BurrMan
4085.3 In reply to 4085.2 
Is this the shape you are refering to?

EDITED: 19 Jun 2012 by BURRMAN

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  twofoot
4085.4 In reply to 4085.3 
Yes, Burr Man. But... There is another section that needs to be underneath this section. Both halves are shown on the DWG. I can get this far, but the shape does not have the proper two sided profile.

You can see top-cross section-bottom in the attached snapshot of the DWG.

This is why I am scratching my head! LOL

C.
Image Attachments:
Size: 457.6 KB, Downloaded: 68 times, Dimensions: 1272x658px
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  BurrMan
4085.5 In reply to 4085.4 
Sorry twofoot, I'm a little slow.. I dont understand.. If you can be more illustrative about the specific area, I would like to participate... Maybe someone else can see what you mean and can help too.
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Michael Gibson
4085.6 In reply to 4085.1 
Hi Chris, so you may be getting confused thinking about using sweep for the spokes - but instead of focusing on sweep you probably want to think about extruding the whole profile to make the shape instead.

Also with a wheel shape it can often be easier to start out with a full revolved solid shape and then boolean out some holes which will then leave the spokes as the left over material.

See this post for an illustration of this technique:
http://moi3d.com/forum/messages.php?webtag=MOI&msg=3349.2

Will that possibly work for what you need?

Also if you want to make a sunken down area instead of a hole that goes all the way through you can do that by making an extrusion that goes to a particular limited depth into the wheel shape and then using that extrusion as the cutting object in a boolean rather than using a curve as the cutting object, since using curves as the cutters makes the hole go all the way through.

- Michael
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  BurrMan
4085.7 In reply to 4085.5 
I am thinking you are talking about this:

EDITED: 19 Jun 2012 by BURRMAN

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  twofoot
4085.8 In reply to 4085.7 
OMG BurrMan, I think you might have done it!

What process did you use?

Thanks

Chris
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  BurrMan
4085.9 In reply to 4085.8 
Hi Twofoot,
The main thing I did was to rebuild the curves to start with, so I could fillet after i extruded.. As with the original file I posted, i just deleted the verticle faces up to the fillt, then mirrored it under to create the spoke, to trim and boolean into the rim revolve...

So in the original file, you can see it is just a double extrude with fillets on the edges, then i deleted these verticle edges here and mirrored and joined it.

Rememeber I didnt use any dimensions from your files. I was just experimenting the method, so you cant use my files (I'm sure you see this)

EDITED: 19 Jun 2012 by BURRMAN

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  BurrMan
4085.10 In reply to 4085.9 
So here is a model that can give the same thing, a little different. Just extruded the shapes through each other. I would fillet these edges, then boolean things together...



I would think you could work this to get the dimensions from your file... The little fillets in the original file are slightly varying at .061-.062 and .0625...

You could review these and fillet these edges at those values to get the spoke... If the Z values need to be adjust, you could cut off the bottom with a boolean diff at half the height and then do the mirror thing...

EDITED: 19 Jun 2012 by BURRMAN

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
 From:  twofoot
4085.11 
This is what the part looks like in real life.

Thanks for the help!

Chris








  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged
 

Reply to All Reply to All