Cant Awaken for Dimension or Convert Faces on Cylindrical sides?

Oak

So when I try to make a sketch and use a cylindrical face's top or bottom relative to sketch plane to dimension off of I cant awaken it as a line nor can I use convert entities to make it into a line. This is killing my design intent as I have to dimension off of weird points I put on a while back into my design. 

Am I doing something weird, or is this not a feature? Is there a work around or a better way to do this?

Thanks.

andrew_troup

That's a capability referred to in other packages as a 'silhouette edge' relation. Not yet something OnS can do. It is certainly a handy thing to have.

In your situation, I would create a sketch on the midplane of your solid which lies parallel to your viewing plane "when normal". I would draw a line near to the desired location, then create "pierce" relations between each endpoint of that line and each of the circular edges of your solid.

This would lie along the required silhouette

andrew_troup

That's a capability referred to in other packages as a 'silhouette edge' relation. Not yet something OnS can do. It is certainly a handy thing to have.

In your situation, I would create a sketch on the midplane of your solid which lies parallel to your viewing plane "when normal". I would draw a line near to the desired location, then create "pierce" relations between each endpoint of that line and each of the circular edges of your solid.

This would lie along the required silhouette

paul_chastell

@Oak (and anyone else). If you would like to be added to a list of people who would be notified when we have this and, more importantly, have your particular needs included in our thinking, then please submit a Support issue and we can add you in.

andrew_troup

@Paul Chastell Roger willco

(I'm actually wondering whether, in cases where, say, Solidworks would routinely report "Unable to identify edge for silhouette", OnS might be able to seek some user input, and thereby provide a quicker, easier way to achieve the desired result - I'll think about that some more before raising a ticket)

paul_chastell

This is the sort of stuff I'm interested in hearing about. Silhouettes can be tricky blighters when being used as persistent model references. If there are cases where its hard for (existing) systems to work out what is meant but it seems obvious to a human then getting details of those will help as we look at our own algorithms.

andrew_troup

OK Paul, I (and hopefully fellow sufferers) will dredge the banks of memory for common characteristics.

andy

This is one of the first things I noticed was missing in OS when I posted this thread here: https://forum.onshape.com/discussion/346/first-model-whats-great-and-what-i-missed#latest

OS needs to implement a tool to create a curve of the intersection of a face and the sketch plane.