×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Simple section sweep issues

Simple section sweep issues

Simple section sweep issues

(OP)
Platform: NX4

I am trying to create a simple sweep from a .18" circle to a .10" circle using a curve between the two center points as a guide.  (i.e. I am making a converging duct)

Issue 1:  The resulting shape is not linear

The little guide arrows point different directions, which means the shape is being twisted, but I am not sure why this matters but it does.

Would someone please explain the correct way to use the NX4 sweep command.  I have gone through several tutorials on the net and am convinced that no one understands how this command works.

Any help would be appreciated.

-Paul

 

RE: Simple section sweep issues

You need to break the circle up into a couple of pieces and ensure that the arrows start at the same quadrant and point in the same direction. (see attached model) alternatively, if it is a round section, draw the cross section and revolve it. It's difficult to understand exactly what you are trying to do without some sort of illustration.

Best regards

Simon (NX4.0.4.2 MP9 - TCEng 9.1.3.6.c)

www.jcb.com

Life shouldn't be measured by the number of breaths you take, but by the number of times when it's taken away...

RE: Simple section sweep issues

Quote:

Issue 1:  The resulting shape is not linear
Set the 'interpolation' option to linear, I think it defaults to cubic.

Quote:

no one understands how this command works
I think this perception comes from the fact that it is a very powerful command with lots of options to choose from. The tutorials you saw probably all used different options from each other and none were precisely the options you needed for your application. There are multiple ways to get the desired effect within this one command. The classic example is sweeping a shape along a helical path; using 1 guide and the default options will result in the shape 'twisting' along the path. This can be fixed by using multiple guides or using the 'vector direction' alignment method.

Spend some time in the help files while you play with the options and post questions as needed. You will find that swept is a powerful and useful command to have in your bag of tricks.

RE: Simple section sweep issues

Yep when sweeping circles best to split them into two halves so that the start and end points are aligned. If on selection the arrows point in opposite vectors there is an arrow to reverse the section direction that will assist you. If you want a linear sweep set the interpolation type to linear, it may have been set to cubic by default.

Using cubic interpolation you may be able to achieve simple tangency with adjacent geometry which supplies a pretty good reason for having the two methods.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources