i need a method of creating a variable offset 1

[fzvnpg]

but different that typical... imagine a half an egg and at the top of the egg is a .5 offset wall thickness. and at the parting line its .75. here is the strange part, at any length of the line from Parting line to top center the wall thickness must remain proportional from .50 to .75. see the oval makes the line different lengths. but the wall spacing must be equal (proportionally along the line). currently we do offsets of each portion of the wave runners and then blend them manually. maybe a grip, or knowledge fusion or something to calculate it which can use the powers build in to NX and less of the designers sweat step by step.

Cj Silver
Tooling Engineer
yesterday was... today is ... tomorrow MAYBE?

 

[JohnRBaker]

What version of NX are you running?

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[fzvnpg]

Version 7.5 and version 9

Cj Silver
Tooling Engineer
yesterday was... today is ... tomorrow MAYBE?

 

[JohnRBaker]

How about the approach I used in the attached model?

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[fzvnpg]

the customer supplies the "A" side and we create the thickness...this thickness is varying from 3.5mm at the top center of the hull (of a jet ski)and 5.5 at the parting line. what our customers does is measure the section and the 2 mm must vary at the same percentage of that line even thought it differs in the section. although I can not show the new hull by looking at any hull (boat or jet ski) you can see the problem

Cj Silver
Tooling Engineer
yesterday was... today is ... tomorrow MAYBE?

 

[JohnRBaker]

You'll probably need to take a series of sections through the original model, from front to back, such that you could use these curves to create a 'Surface Thru Curves' which would represent the original surface. Now do as I did with that single curve in my example where I created an 'Offset Curve' using a 'Linear Law' to define the offset distance along the length of the curve. Do this for each intersection curve and then create new surface which will represent either the inner or outer face of the final model, depending on what face the original model represented.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[fzvnpg]

I am really feeling "OLD" but I can not remember how to do the law curve to do this offset by percentage

Cj Silver
Tooling Engineer
yesterday was... today is ... tomorrow MAYBE?

 

[fzvnpg]

told you I am I old... I got it thanks

Cj Silver
Tooling Engineer
yesterday was... today is ... tomorrow MAYBE?

 

[fzvnpg]

one last question is there a way to do this to a surface? (law curve offset)

Cj Silver
Tooling Engineer
yesterday was... today is ... tomorrow MAYBE?

 

[JohnRBaker]

Sorry, but there is no 'Law Controlled' options when crating an Offset Surface.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.

 

[cowski]

The "variable offset" command allows linear or cubic variation throughout the offset. With some judicious surface splitting/editing, you might get something usable out of it. However, I suspect that John's method with the offset curves/through curve mesh will be the easier route...

www.nxjournaling.com