Symmetrically Opposite Details?!?!?!?

[drewboy23]

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.

 

[DBezaire]

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

 

[drewboy23]

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

 

[drewboy23]

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

 

[V5MAN]

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

 

[drewboy23]

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

 

[DBezaire]

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

 

[drewboy23]

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

 

[jackk]

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.

 

[V5MAN]

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.

 

[CATPart]

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

Rgds,
Damir

 

[itsmyjob]

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 ​

 

[drewboy23]

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.

 

[DBezaire]

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

 

[drewboy23]

Try this link.

http://home.comcast.net/~aparrow75/images/ANDY_SYM_ARM.zip

 

[CATPart]

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

 

[drewboy23]

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

 

[CATPart]

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.

 

[DBezaire]

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

 

[V5MAN]

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.