×
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

Symmetrically Opposite Details?!?!?!?

Symmetrically Opposite Details?!?!?!?

Symmetrically Opposite Details?!?!?!?

(OP)
So I've gotten a CATProd that has obvious RH and LH details that are sym. opposite. But there is no symmetry applied in the tree anywhere. My question is, how was it done. The CATParts have the same name, but are opposite. You have one and the other changes. I cannot figure it out.

RE: Symmetrically Opposite Details?!?!?!?

There is no assembly symmetry applied?  Look at the product level for Assembly features --> Assembly symmetry

RE: Symmetrically Opposite Details?!?!?!?

(OP)
Nope. Nothing. Not sure how to post a screen shot up here.

RE: Symmetrically Opposite Details?!?!?!?

(OP)
Here is a screen dump. "ARM ADJUSTABLE rev4" is a single CATProd. But is shown as RH and LH with obviously sym. opposite details.


RE: Symmetrically Opposite Details?!?!?!?

Can you please add an image showing the specification trees for each part please.

RE: Symmetrically Opposite Details?!?!?!?

(OP)
"ARM ADJUSTABLE rev4" is a CATProd with 57 CATParts. Screen shot of each part would be very timely.

RE: Symmetrically Opposite Details?!?!?!?

Drewboy23 - look at the part body tree of each catpart (LH and RH).  If they are linked you will see 1 of them with a green dot or a bluish P.

Regards,
Derek

RE: Symmetrically Opposite Details?!?!?!?

(OP)
In the screen dump below, FRONT_PERCH_rev3.CATPart is one file - but shown and linked somehow to be both RH and LH.



RE: Symmetrically Opposite Details?!?!?!?

I don't see anything in the tree either....

Kind of hard to tell from the geometry, but it could be 2 instances of the same perch, but constrained to flip one from the other.

RE: Symmetrically Opposite Details?!?!?!?

Ok - judging by the position of the 'slider' on the LH side of the screen the 2 parts are at different levels in the assembly structure. It's difficult to tell from the image, so please excuse the question. Is the Front Perch part truly symetrical or is it possible it can be fitted in either hand? If so it's possible it's another instance of the same part and the instance name has been modified?  

If not, investigate further by switching on display of 'Parameters' and 'Relations' in Part Infrastructure -> Display.  Also look at menu function Edit -> Links, and 'Parents & Children' by right clicking on a feature. These should expose the relationships & links which may help understand the behaviour you get.

RE: Symmetrically Opposite Details?!?!?!?

Check if the part is made using POSITIONED SKETCH, thay can easly be fliped.

Rgds,
Damir

RE: Symmetrically Opposite Details?!?!?!?

Hi,

can you look at the bottom of "ARM ADJUSTABLE rev4"  to see if there is any assembly symmetry...

Eric N.
indocti discant et ament meminisse periti

RE: Symmetrically Opposite Details?!?!?!?

(OP)
I did look there, looked everywhere in the tree. No assembly symmetry applied anywhere.

I can send the file if you want to look at it.

RE: Symmetrically Opposite Details?!?!?!?

I will take a glance, can you post a link to a file, they frown upon email address in posts.

RE: Symmetrically Opposite Details?!?!?!?

I think that the assembly has been made in Catia V4.

RE: Symmetrically Opposite Details?!?!?!?

(OP)
The original was done in Catia V4, but then translated to Catia V5 and modified.

RE: Symmetrically Opposite Details?!?!?!?

Long time since I worked in V4, I gave a quick look at assembly and symmetry in my opinion has been defined in V4.

The parts are made with simple features, therefore the past special CATIA_SPEC option worked fine, and V5 constrains used to prevent movements.

RE: Symmetrically Opposite Details?!?!?!?

Very sneaky, I will investigate further, but this might be a V4 feature not offered unless you have some funky $$$ V5 license.

RE: Symmetrically Opposite Details?!?!?!?

I downloaded the the file and, well - I think the mystery of why the opposite hand of part FRONT PERCH rev3.1 changes when you change its mirror image.

The fact is they are not seperate parts - they are both modelled in one part.

Bad news is it seems that has been the general approach to the other parts too.

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