Punch! CAD 
 »  
ViaCAD & Shark 
 »  
Solid Modeling 
 »  
Varaible Blend - Radius Curve (#1825) 
 
            
            
    
        
Rank: Senior Member
Joined: 6/24/2008(UTC)
 
     
    
        
            
	      
                HI,
            
  
         
     
 
    
        
            
     
    
        
            
        
     
 
    
        
     
 
            
        
            
        
            
            
    
        
Rank: Member
Joined: 8/3/2008(UTC)
 
     
    
        
            
	      
                Hi Unique
            
  
         
     
 
    
        
            
     
    
        
            
        
     
 
    
        
     
 
            
        
    
        
            
            
    
        
Rank: Senior Member
Joined: 2/2/2007(UTC)
 
     
    
        
            
	      
                Hello Paul
Sorry, I hadn't forgotten just been a little busy with other things the last couple of days.  Here's a quick movie which I hope explains Radius Curve Variable Blend.
http://www.cadsoftsolutions.co....e_blend_radius_curve.mov The distance of the curve in y from the x axis defines the radius.  It's a good idea that the curve length is equivalent to the length of the edge to be blended so as to be able to accurately position where each of the different radius values will be applied to the edge.  If the edge is shorter then the curve will be compressed to fit and if longer will be stretched.
All the best
Nick
  
         
     
 
    
        
            
     
    
        
            
        
     
 
    
        
     
 
            
        
            
        
            
            
    
        
Rank: Senior Member
Joined: 6/24/2008(UTC)
 
     
    
        
     
 
    
        
            
     
    
        
            
        
     
 
    
        
     
 
            
        
    
        
            
            
    
        
Rank: Member
Joined: 8/3/2008(UTC)
 
     
    
        
            
	      
                A very nice tool, with a few caveats: 
The position of the curve is real touchy! The curve must be on the XY plane but, not necessarily in the 1st quadrant as the manual says, Y must, of course be positive or zero since the Y value maps to the blend radius. 
Worse, all those meaningless ACIS errors occur for no apparent reason! (situation detected too complex for capping, inconsistent face-body relationship, unable to construct acis geometry for blend,  etc). These seem to be the result of trying to blend anything other than a single edge of a cube and/or using anything other than a spline as the defining curve. :confused:
Attached is an illustrating example; try to replace the spline with a conic or blend any of the edges of the half cylinder with anything. Also you can't select more than one edge or chain.
File Attachment(s):
 curve_blend.vc3 
(65kb) downloaded 5  time(s). You cannot  view/download attachments. Try to login or register.
  
         
     
 
    
        
            
     
    
        
            
        
     
 
    
        
     
 
            
        
            
        
            
            
    
        
Rank: Senior Member
Joined: 2/2/2007(UTC)
Posts: 5,450
Was thanked: 508 time(s) in 354 post(s)
 
     
    
        
            
	      
                >>The position of the curve is real touchy! 
    Tim Olson 
    
        
            
     
    
        
            
        
     
 
    
        
     
 
            
        
    
                           
Punch! CAD 
 »  
ViaCAD & Shark 
 »  
Solid Modeling 
 »  
Varaible Blend - Radius Curve (#1825) 
 
    
        Forum Jump
         
Punch! CAD 
  ViaCAD & Shark 
   - News and Announcements 
   - General 
   - 2D Drafting 
   - Surface Modeling 
   - Solid Modeling 
   - Subdivision Modeling 
   - Rendering & Display 
   - Import/Export 
   - Tips and Tutorials 
   - Suggestions 
   - Gallery 
   - PowerPack 
   - Punch Lounge 
 
    
    You cannot  post new topics in this forum.
cannot  reply to topics in this forum.
cannot  delete your posts in this forum.
cannot  edit your posts in this forum.
cannot  create polls in this forum.
cannot  vote in polls in this forum.