topic Re: Lofting Over Sharp Radius in Fusion Support Forum

Lofting Over Sharp Radius

Ian.c.Stitt — Tue, 11 Jun 2024 06:40:53 GMT

I am trying to create an adapter that goes from a 2 3/16 to 2 1/8 in a 90 degree bend while minimizing the vertical distance it must travel. Basically I want the adapter to start turning direction and "adapting" it's diameter right off of the one plane to the other, but when I try to run a loft it gives me errors and says it is self intersecting. I cannot to save my life get this radius to work. Any help would be appreciated in getting this part to work and I have my sketch geometry attached below. Thank you!

Re: Lofting Over Sharp Radius

davebYYPCU — Tue, 11 Jun 2024 07:51:45 GMT

Sweep with Path and Guide rail may be acceptable.

More rails for a Loft if that does not work for you. (Full solid with Shell)

Might help...

Re: Lofting Over Sharp Radius

g-andresen — Tue, 11 Jun 2024 08:39:08 GMT

Hi,

try 2 rails for loft as @davebYYPCU recommended

1. Create intersection points in the sketch and connect them with a spline or lines/fillets
2. loft with 2 rails
3. Shell from body

(view in My Videos)

günther

Re: Lofting Over Sharp Radius

Ian.c.Stitt — Wed, 12 Jun 2024 06:13:57 GMT

Wonderful! Thank you guys very much!

Re: Lofting Over Sharp Radius

TrippyLighting — Wed, 12 Jun 2024 18:07:43 GMT

Following the screenshot in the OP you would not need a loft.

A sketch for a sweep profile and another sketch for a sweep path would be sufficient.

Re: Lofting Over Sharp Radius

g-andresen — Wed, 12 Jun 2024 18:30:31 GMT

Hi,

@TrippyLighting wrote:

Following the screenshot in the OP you would not need a loft.

A sketch for a sweep profile and another sketch for a sweep path would be sufficient.

The diameters are (intentionally or not?) not identical.

günther

Re: Lofting Over Sharp Radius

TrippyLighting — Wed, 12 Jun 2024 18:52:57 GMT

Hmmm..K, 3 sketches and a sweep with guide rail. Sketch 2 isn't really needed.

Re: Lofting Over Sharp Radius

Ian.c.Stitt — Mon, 17 Jun 2024 07:08:18 GMT

Can I loft along 4 rails to have the sides bellow out a little before sweeping down? And yes the diameters are not identical purposefully; is sketch 2 still not necessary?

Re: Lofting Over Sharp Radius

davebYYPCU — Mon, 17 Jun 2024 08:29:58 GMT

to have the sides bellow out a little before sweeping down?

Yep, be careful what you ask for. My original Sweep with Guide Rail did not make the bulge, just adjusted the diameters on the way. The 2 side rails would likely need some tricky construction, unless you describe the limitations to the bulge.

Might help...

Re: Lofting Over Sharp Radius

Ian.c.Stitt — Thu, 20 Jun 2024 04:47:17 GMT

When I try to do the same intersect and connect with a spline it lets me select the circles to intersect but the purple snap points don't appear. I have tried in the existing sketch, a new one, and a new sketch on a plane parallel with the "bulge" feature. Not sure why I can't just do the same thing as before again just with a different shape of guide rail. Thanks for the help!