logo
NOTICE:  This is the new PunchCAD forum. You should have received an email with your new password around August 27, 2014. If you did not, or would like it reset, simply use the Lost Password feature, and enter Answer as the security answer.
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
Reverse? Fillet in Solid (#2961)
Options
Go to last post Go to first unread
Previous Topic Next Topic
misterrogers  
#1 Posted : Wednesday, February 3, 2010 11:18:21 PM(UTC)
misterrogers

Rank: Senior Member

Joined: 8/14/2009(UTC)
Posts: 444
I don't know what the correct term for this operation might be, but what is the proper way to take a solid for example a cube, and rather than fillet the edge so that the curve is convex, make it concave.

Basically instead of "rounding" an edge, I want the edge to be concave.

Any takers? Thanks!!
Back to top
NickB  
#2 Posted : Thursday, February 4, 2010 1:44:54 AM(UTC)
NickB

Rank: Senior Member

Joined: 2/19/2007(UTC)
Posts: 501

Was thanked: 2 time(s) in 1 post(s)
Do you mean something like this ?
(modeled with Shark FX beta build 927)
File Attachment(s):
cube.sfx.zip (237kb) downloaded 5 time(s).
NickB attached the following image(s):
cube.png (71kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Shark FX 9 build 1143
OS X 9.5
3.6 GHz Core i7, 8GB, GTX 760 2GB

matter.cc
Back to top
WWW
zumer  
#3 Posted : Thursday, February 4, 2010 2:14:10 AM(UTC)
zumer

Rank: Senior Member

Joined: 11/4/2007(UTC)
Posts: 515

Was thanked: 1 time(s) in 1 post(s)
Do you want this result?
zumer attached the following image(s):
concave edge subtract cylinders vertex to vertex.PNG (29kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
blowlamp  
#4 Posted : Thursday, February 4, 2010 3:38:08 AM(UTC)
blowlamp

Rank: Senior Member

Joined: 6/28/2008(UTC)
Posts: 648
I instinctively put a minus sign in front of the Radius value for a Constant Blend, in the hope that it might do this but unfortunately it is ignored. It made me think that if you could flip the radius, then it might also be possible to use the feature to apply Beads or Weld type fillets to edges. The pics show what I mean, the first one being a normal blend and the second is what I imagine could be achieved by inserting a minus sign before the Radius value.

Martin.
blowlamp attached the following image(s):
10mmfillet.PNG (42kb) downloaded 5 time(s).
10mm flippedfillet.PNG (40kb) downloaded 5 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
ianjkirby  
#5 Posted : Thursday, February 4, 2010 8:19:10 AM(UTC)
ianjkirby

Rank: Senior Member

Joined: 6/20/2007(UTC)
Posts: 107
Ok Nick, that's great, but how did you do it, please? I tried the negative radius for the blend tool, and as Martin pointed out, it is ignored, so I am left wondering!:confused:
Regards, Ian.
Ian Kirby
Wollongong Australia
Back to top
Jean-Francois Jacques  
#6 Posted : Thursday, February 4, 2010 10:30:14 AM(UTC)
Jean-Francois Jacques

Rank: Senior Member

Joined: 11/25/2009(UTC)
Posts: 833
Canada

Thanks: 2 times
Was thanked: 29 time(s) in 21 post(s)
Nick..nice tip for negative blend!! (but many operations). It will be interesting to have this behavior with automatic negative blend value!!
METEORE DESIGN / KEKO Stand
Jean-Francois Jacques, Industrial Designer
SharkCad Pro V14 B1653
Platform macOS 14 Sonoma
Back to top
WWW
misterrogers  
#7 Posted : Thursday, February 4, 2010 11:27:51 AM(UTC)
misterrogers

Rank: Senior Member

Joined: 8/14/2009(UTC)
Posts: 444
Originally Posted by: NickB Go to Quoted Post
Do you mean something like this ?
(modeled with Shark FX beta build 927)


Yes Nick, exactly like that. I want to know a quick way to add the fillets you have shown. What tool did you use for that in 927?


Blowlamp: I tried the negative radius too, and it ignored it too. It sounds like it should be as simple as that..
Back to top
Tim Olson  
#8 Posted : Thursday, February 4, 2010 11:31:23 AM(UTC)
Tim Olson

Rank: Senior Member

Joined: 2/2/2007(UTC)
Posts: 5,447
United States

Was thanked: 502 time(s) in 353 post(s)
You might try putting a pipe equal to the radius on all the edges and subtracting. Then blend resulting hard edges in the corner.

The ACIS radial blend is fixed to do tangent edges so the negative radius wont work.


Tim
Tim Olson
IMSI Design/Encore
Back to top
NickB  
#9 Posted : Thursday, February 4, 2010 2:25:03 PM(UTC)
NickB

Rank: Senior Member

Joined: 2/19/2007(UTC)
Posts: 501

Was thanked: 2 time(s) in 1 post(s)
Its a complete cludge, but it works.

Three rectangles booleaned together with fillets on the edges. This is what I like about Shark, that with some thought you can create almost anything. I like that there are simple powerfull tools, rather than a million specialized ones.

http://screencast.com/t/M2JkMzc3YTEt
Shark FX 9 build 1143
OS X 9.5
3.6 GHz Core i7, 8GB, GTX 760 2GB

matter.cc
Back to top
WWW
misterrogers  
#10 Posted : Thursday, February 4, 2010 5:38:28 PM(UTC)
misterrogers

Rank: Senior Member

Joined: 8/14/2009(UTC)
Posts: 444
thanks a bunch Tim, I'll try that.

Good demo NickB. I think that's a pretty simplified way to get what I need done. For doing fillets for moldings on table or cornice of a case piece, that would work well which is what I'm doing. btw it's good to see a mac user on here. :)
Back to top
misterrogers  
#11 Posted : Friday, February 5, 2010 9:16:48 PM(UTC)
misterrogers

Rank: Senior Member

Joined: 8/14/2009(UTC)
Posts: 444
Originally Posted by: Tim Olson Go to Quoted Post
You might try putting a pipe equal to the radius on all the edges and subtracting. Then blend resulting hard edges in the corner.

The ACIS radial blend is fixed to do tangent edges so the negative radius wont work.


Tim


Finally got to trying this. I never used the pipe tool before because there didn't seem to be a reason for it. I could get used to this method easily.

This goes back to what NickB said about not having a million specialized tools but having less each having more versatile function.
Back to top
Users browsing this topic
Guest (3)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET 2.1.2 | YAF.NET © 2003-2024, Yet Another Forum.NET