Hi Mala, another technique that could be good is if you are able to form that centerline fin with the shape you want then you can use the Transform > Deform > Flow command to map an already swept world-axis-aligned shape onto it.

The advantage to this is that it is much easier to adjust the shape of the sweep when it's constructed straight in a world axis direction.

To do this you create a regular plane and construct the sweep based on that. Then you select the sweep and run the Transform > Deform > Flow command, and select the plane as the base surface and the fin as the target surface. Note that where you click on the base and target surfaces is significant for controlling how they will be matched, some info here:
https://moi3d.com/4.0/docs/moi_command_reference8.htm#flow

That looks like this:





Then it's Edit > Trim to cut the pieces up, Edit > Join to glue them together and Construct > Fillet to round the edges:



- Michael

Oooooo……

Ahhhhh…….

I agree with Burr Man - ahhh oooh - I try it out this afternoon. THANK YOU!

A start. Yes. Pretty cool. The only thing that's not good yet are the sharp, top edges running out to the cylinder. They should be softer. However, the filleting stops at 1.5 mm.

This is "exactly" the shape of my brake. However, the shape is not yet perfect. I have done a two rail sweep. Is it the edges of the contour line? Because it is ideal from the side, but not from above. Do I have to change that?

Hi Mala, I'm sorry I'm not understanding what you want to have it do different than what you currently have.

One thing though is if you edit the middle curve so that it's centered you can use it as a scaling rail to control the height.

Like this:




- Michael

Hi,
try the attached network solution it gets rid of the pinching on the ends.
Cheers
Barry

Hi Berry,
your model is very near to the goal I try to reach. Thanks a lot!!!
I need to reshape the profiles rounder what I did now. And I must reshape the height line for sweeping.
I fail after so many tries with reshaping the height line. Why is it not possible to round the ends of the heigtht line with filleting? Or do I have to reconstruct the height line in an other way?

best, Mala

Shit - I guess I got it. I tried so many times the arc tool with two deffinition points...and failed always. Now it worked. And I was able to make a relatively proper heightline. BUT - not fully perfect: At the end of the banana there is a little irritation...but it should work. Best, thx, Mala

...hmmm´, like thought. I can flow deform the banana. But the filleting at the ring segment: calculation fails. No idea how to construct the banana better than how it is now?

Now I made an extrusion to avoid a conflict when booling with the ring. I guess it is not state of the art. But in 1 hour I need the ring for 3d SLA-print. Later I fill rubber into the 3d model...

I cannot do filetting with the "banana". Where is my mistake?
In the 3d file the banana and the ring are not booled or trimmed (not sure which operation is here state of the art - I do not yet exactly the difference)
But for filleting I cuted both objects and connected them.

Hi Mala,

re:
> booled or trimmed (not sure which operation is here state of the art - I do not yet exactly the difference)

If you have a solid then booleans are good, the booleans cut pieces up and then decide which pieces to keep based on which solid volume they are contained inside of.

If you have open surfaces then that's usually when you should use Trim - Trim doesn't automatically decide which pieces to remove, you have to pick the pieces you want to get rid of.

On your model I'm not sure why Filleting doesn't work but if you break the object apart into individual surfaces you can use surface/surface filleting on it by selecting 2 surfaces at a time instead of edges.

I can help you do that, what radius do you want?

- Michael

I would like to understand and learn it myself. And it is still in progress. So it does not make so much sense giving the diameter of filleting. One learning I have in the meantime is trim vs. bool. Here in the attached file I put the banana to the cylinder first with the Trim operation and then the Bool: Union joined together. Filleting with the separated surfaces did not work.

Hi Mala,

re:
> Filleting with the separated surfaces did not work.

It's working for me over here, here is what it looks like:



- Michael

A way to find the problem of fileting here is perhaps a problem in your banana.
If you use SelectNakededges on the banana, you will see a problem with double edges zone.
Perhaps, a problem in the banana's creation ?

Test this one with a reconstruction using loft and blend creation

Yup Phiro is right there is a naked edge on your base model here:


- Michael