I want to make a helmet shape and have tried to use a loft

peter_clifford

Hi all,

I want to make a helmet shape and have tried to use a loft from a horizontal profile to a vertical profile but it will not work. It creates some intermediate steps that don't belong and I can't fix it.

Any ideas?

Thanks

Jake_Rosenfeld

@peter_clifford

It seems like that curve you have sketched should be used a guide, not a path.  As Bruce says, it will be easier to see what's going on if you post the link to your document.

mlaflecheCAD

@peter_clifford Perhaps using Normal to Profile and the Path with 5 sections is causing a conflict.  Also, creating a surface with a thicken operation afterwards is way easier than trying to loft complicated sketches.

This type of geometry may be best served by using several surface models put together.  My colleague @jdesilets created this awesome helmet design from a couple images natively in Onshape.  Take a peek:  https://cad.onshape.com/documents/22aec34a5bba7a6a8a12ce08/w/db3487a329c1d1bf00b4f7da/e/6fe7e59de9ea2c65983675d5

peter_clifford

https://cad.onshape.com/documents/68313dbd25e625c91a4a3dbc/w/6cb9f23eaa13a2ea913357f6/e/1fe19582a681e85568e3799e

bruce_williams

changed the end points of Sketch 3 to be pierce constraints and it works...

https://cad.onshape.com/documents/48bfd34949ae981c51237393/w/66c5241fd9da8d2e08391529/e/61e82940bf70d1ec509348de

philip_thomas

https://cad.onshape.com/documents/22aec34a5bba7a6a8a12ce08/w/db3487a329c1d1bf00b4f7da/e/6fe7e59de9ea2c65983675d5



(Not mine - Johnny D's )

billy2

Tell Johnny D that he did a really nice job.

It's very organized, which makes it a joy to scan through looking to see how it was constructed.

Thanks for posting.

philip_thomas

@JDesilets ^^^

bruce_williams

@peter_clifford
please post a link to your document; see these guidelines:
https://forum.onshape.com/discussion/9107/forum-post-checklist-read-this-first#latest

Jake_Rosenfeld

@peter_clifford

It seems like that curve you have sketched should be used a guide, not a path.  As Bruce says, it will be easier to see what's going on if you post the link to your document.

mlaflecheCAD

@peter_clifford Perhaps using Normal to Profile and the Path with 5 sections is causing a conflict.  Also, creating a surface with a thicken operation afterwards is way easier than trying to loft complicated sketches.

This type of geometry may be best served by using several surface models put together.  My colleague @jdesilets created this awesome helmet design from a couple images natively in Onshape.  Take a peek:  https://cad.onshape.com/documents/22aec34a5bba7a6a8a12ce08/w/db3487a329c1d1bf00b4f7da/e/6fe7e59de9ea2c65983675d5

peter_clifford

https://cad.onshape.com/documents/68313dbd25e625c91a4a3dbc/w/6cb9f23eaa13a2ea913357f6/e/1fe19582a681e85568e3799e

bruce_williams

changed the end points of Sketch 3 to be pierce constraints and it works...

https://cad.onshape.com/documents/48bfd34949ae981c51237393/w/66c5241fd9da8d2e08391529/e/61e82940bf70d1ec509348de

philip_thomas

https://cad.onshape.com/documents/22aec34a5bba7a6a8a12ce08/w/db3487a329c1d1bf00b4f7da/e/6fe7e59de9ea2c65983675d5



(Not mine - Johnny D's )

billy2

Tell Johnny D that he did a really nice job.

It's very organized, which makes it a joy to scan through looking to see how it was constructed.

Thanks for posting.

philip_thomas

@JDesilets ^^^

John_P_Desilets

@billy2   I am happy this example helped you out! Keep the questions coming.