Loft issue

fma

Hi!

I'm trying to use the 'loft' tool, but I'm unable to do what I want. Here is a simple case:

https://cad.onshape.com/documents/745756e8a13804d0078eb51c/w/27a362bdfeeae4d6bc3de5a1/e/0fea75d1e3af1eea2a2a2d56

How can I make the vertices from one sketch match the correct ones in the other sketch, as I don't have the same number? I don't understand how does the 'Match vertices' tool work...

Thanks for your help.

Narayan_K

fma , Since it has different vertices we are not getting expected result.

As a work around i have divided both sketch into two and lofted separately as below,

Narayan_K

Narayan_K

Narayan_K

Sorry for the multiple messages.Since it has showed me error while posting comments.i pressed post comment button multiple times.At last there are 4 same comments.

fma

Ok, I see! I have tried to add some simple points, on the 'sketch to' rectangle, but it didn't work.

BTW, adding the central line on 'sketch to' solves the problem without the need to use multiple lofts.

Thanks!

chris_8

fma said:

Ok, I see! I have tried to add some simple points, on the 'sketch to' rectangle, but it didn't work.

BTW, adding the central line on 'sketch to' solves the problem without the need to use multiple lofts.

Thanks!

Instead of adding simple points, I suggest using the Split tool (in the same drop-down list with Trim and Extend).    I didn't realize there was a difference between Split and Point until watching one of Cody Armstrong's awesome instructional videos a few months back.

.

fma

Even better. Thanks for the tip!

fma

Ok, now, I have the 'self-intersecting body' issue (not on the above example). I read some other posts related to that problem, but I have to admit that I don't understand what it means...

chris_8

fma said:

Ok, now, I have the 'self-intersecting body' issue (not on the above example). I read some other posts related to that problem, but I have to admit that I don't understand what it means...

That basically means somewhere the loft would fold in on itself with your current sketches.  Probably the loft you're imagining doesn't do that, but you need to provide more instructions for onshape to follow so it will follow your idea better and not intersect itself.  That's where guidelines become necessary.

There's something else that took me a while to pick up on, which matters for guidelines in lofts:  Pierce works better than Coincident for attaching guidelines to profiles.

fma

Ok, I will have a look at guidelines. Thanks.

fma

Another thing I don't understand: why does from/to order matter?

chris_8

Order matters because you're not limited to two profiles.  You can loft through 3 or more and Onshape needs to know which way to go

fma

I see!!! I didn't know it was possible to use more that 2 profiles! Great.