expressions in works

[NikonF6]

can someone explain, step by step (from file, new, modeling, ...), how to make these expressions to work (normal helix). Should I have some curve already before writing these expressions, ...

t = 1
teta = 360
radius = 12
no_turns = 5
height = 45
pitch = ( height/no_turns )
xt = radius * cos( teta * t * no_turns )
yt = radius * sin( teta * t * no_turns )
zt = pitch * t

\is "t" NX internal variable changing from 0 ro 1?

Thanks a lot for your time

 

[cowski]

is "t" NX internal variable changing from 0 ro 1?

Yes. Do you really want the pitch (zt value) to vary?

Assuming you want a constant pitch helix:
To create a curve from your equations, go to Insert -> Curve -> law curve.
X law: by equation, parameter t, function xt
Y law: by equation, parameter t, function yt
Z law: constant, value: pitch

www.nxjournaling.com

 

[NikonF6]

Thanks Cowski a lot.
I never before used this to create a curve. I use NX 7.5
I got many options (7), and click on "by equation"
Came out "law curve" but with only one row showing t in it.
How to enter all of that equations together?

Thanks again

 

[JohnRBaker]

What version of NX are you running? If it's NX 8.5 or newer, you may have a alternative.

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

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

 

[NikonF6]

I use NX7.5

 

[JohnRBaker]

Then what cowski suggested is your only course of action.

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

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

 

[cowski]

Open the expression editor (Tools -> expression) and create/enter the formulas in the original post, then create the law curve.

www.nxjournaling.com

 

[Toost]

Continuing Cowskis last post :
When you thereafter create the curve and select the "By equation" option, you will be prompted for the named variables you showed in the first post.
( You are free to use any variable , but NX will by default ask for the ones you show.)

Regards,
Tomas

 

[NikonF6]

Thanks to you guys I got it