Selecting a feature's edge or points while sketching? 1

[WK95]

I'm a novice in CATIA right now. In CATIA while working a sketch, I can't have my cursor snap to a point or edge on other sketches or features. Is there some button I have press while sketching if I want to do this? Alternatively, I'd want to be able to select edges and points of other sketches such as a sketch that is orthogonal to the current one.

 

[itsmyjob]

you will not be able to snap to element not in the sketch.

you have to project(/intersect) the element in(/with) the sketch to be able to snap to it.

Eric N.
indocti discant et ament meminisse periti ​

 

[ferdo]

Read also thisLink , it might help you.

Regards
Fernando

https://picasaweb.google.com/102257836106335725208

- Romania

https://picasaweb.google.com/103462806772634246699/

- EU

 

[WK95]

Thanks you two. It works just fine though it's somewhat convoluted compared to what I'm used to.

 

[WK95]

Actually, I'm having another difficulty. I'm working on top-down assemblies right now and I have created part 1. I then create a second part, part 2, and project a couple of lines from part 1 onto a sketch in part 2. However, when I change the dimensions in part 1, the projected lines do not change to reflect the new dimensions.

Specifically, I'm trying to project the side of a cylinder onto a plane next to it. Also, I'm projecting the circle part of a cylinder to another plane parallel to the flat surface of the cylinder.

 

[JeniaL]

check if keep link with selected object option is on

 

[lardman363]

You need to link between the 2 parts.

[ol 1]
[li]Load your assembly with part a and part b[/li]
[li]acitvate part A[/li]
[li]pick the sketch feature from the specification tree[/li]
[li]select Tools --> Publication[/li]
[li]Yes you want to publish selected elements[/li]
[li]Ok the publication window, a Publications node will appear at the bottom of your tree in[/li]
[li]Use the right mouse button to copy the sketch publication[/li]
[li]activate part B[/li]
[li]use right mouse button on part B[/li]
[li]select paste special --> as result --> with link, a copy of your sketch appears under External References geoset[/li]
[li]Activate assembly[/li]
[li]Hide part a[/li]
[li]activate part b[/li]
[li]make a sketch and project from the referenced sketch from part a[/li]
[li]now when you update part a, part b should update[/li]
[/ol]

 

[WK95]

Thanks Lardman, I'll try that out.

Also, in CATIA, I notice an Associativity and Add to Associated Part button. Is that relevant to what I want to do?

FIGURED IT OUT! Turns out I need to select the projected element and press Local Update. Update All didn't seem to work.

 

[lardman363]

Associativity and add to associated part will take all published features from part a and put them in part b or in a new part. There was a problem with it though like if you ran it twice to get new features, it would delete the old features and bring them back in...then all the downstream features would need to be repointed...or something like that.