topic Re: Patching between sketches in Fusion Design, Validate & Document Forum

Patching between sketches

gixxerrider73 — Sun, 15 Aug 2021 13:11:42 GMT

I'm trying to model this boat hull using a technique I watched on youtube. Its created with 3d sketches then using the patch, create the surfaces. I'm trying to create two surfaces, the side then the bottom. When I use the patch command, I don't get an error but "OK" button is greyed out so I'm not sure what is missing. I'm sure there is something obvious im overlooking.

Here is a snap shot and the fusion file attached.

Boat File

Betreff: Patching between sketches

g-andresen — Sun, 15 Aug 2021 14:07:22 GMT

Hi,

Please share the file.

File > export > save as f3d on local drive > attach it to the next post.

Currently, attachments are only possible via global replys

günther

Re: Patching between sketches

TrippyLighting — Sun, 15 Aug 2021 14:42:13 GMT

In 90% of the cases, the Patch command is the wrong tool and it should be used as a last resort, not the beginning of the design process.

I can already see that your curves need some work.

As @g-andresen has already commented, please share your design.

Re: Patching between sketches

gixxerrider73 — Sun, 15 Aug 2021 16:30:08 GMT

I provided a link to my dropbox in the first post as I did not get the box to attach the file. the link was "boat file"

its attached now.

So in lieu of patch use the loft?

Re: Patching between sketches

TrippyLighting — Sun, 15 Aug 2021 16:50:38 GMT

Before you continue, this is not really a beginner project, and there are a number of traps. So be patient!

Good surfaces require very clean curves with smooth curvature. That cannot be overstated!

The first curve you constructed already has pretty terrible curvature. Reason #1 is that you used too many spline control points. More than 3 are unlikely necessary.

Again, it takes a bit of patience to finagle the spline points and tangent handles so the curve matches the shape of your reference sketches.

In fact, you will likely be better off using control point splines instead of fit-point splines.

Start with a 3-degree control point spline with 4 points. If that does not work, use A 5-degree spline with 6 points.

Here is some literature you should familiarize yourself with.

Re: Patching between sketches

davebYYPCU — Sun, 15 Aug 2021 22:26:35 GMT

Top picture has white points, (not connected) which will give the Loft Tool reason to error.

3d sketches can be avoided with 2 2d sketches and helper surfaces.

Loft from body edges.

Might help....