Turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Navigation
- NX Design
- Forums
- Blogs
- Knowledge Bases
- Groups

- Siemens PLM Community
- NX Design
- NX Design Forum
- unequal segments after pattern along an ellipse

Options

- Start Article
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

11-10-2018 04:51 AM

Hi,

I have a problem with pattern along a curve. I have a point on an ellipse and I do a pattern geometry with constant pitch of 20 mm arc length along this ellipse:

Then I use a divide curve command and divide it with my patterned points:

I don't understand why the segments of my ellipse have not the same exact length of 20mm?!?

When the path is a line or circle it works OK. But it gives me unequal length segments with conics, ellipse and even spline.

Also I checked the other methods rigid and offset. The problem still exists.

Anybody has any Idea?

Thanks.

Solved! Go to Solution.

- Tags:
- pattern along

Labels:

4 REPLIES 4

Re: unequal segments after pattern along an ellipse

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

11-12-2018 09:03 AM

Just wondering...

Have you looked at the chord length of each segment (distance between the endpoints, not along the curve)

Production:NX10.0.3.5 MP16/TC11.2

I'd rather be e-steamed than e-diseaseled

Re: unequal segments after pattern along an ellipse

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

11-12-2018 11:57 AM

chord lengths are not the same too:

and the same story in NX12.0.2 (above picture)

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

11-12-2018 12:30 PM

Hi @robot139,

This appears to be the same issue reported in PR 7718451: "Pattern Geometry accuracy problem along splines", which was closed as EN (Enhancement) for the following statement:

"*There is indeed an arc length accuracy problem for this PR scenario. Further investigation shows that fairly significant enhancement effort is needed to address this problem. At this time, this PR will be closed as an enhancement.*"

You might want to look into alternative solutions, such as creating a Point Set. If you're interested in finding out when the ER is implemented, please open an Incident Report with GTAC and ask that you're added to the ER.

Regards, Ben

Re: unequal segments after pattern along an ellipse

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content

11-12-2018 12:40 PM

Thanks Ben.

Follow Siemens PLM Software

© 2019 Siemens Product Lifecycle Management Software Inc