topic Re: Lofting substract doesn't work in Inventor Forum

Lofting substract doesn't work

berry.lejeune — Mon, 10 Jul 2023 08:07:46 GMT

Hi everyone,,

For some reason I'm unable to perform a loft on attached part. (loft10)

I've already tried a lot of things (making 2 parts from it and tried to substract them from each other, surfaces,...)

Making the loft to substract doesn't work but when I let the loft make a new solid it does work.

What am I missing, because normally I figure these things out but this one got me stuck

Thanks

Re: Lofting substract doesn't work

CCarreiras — Mon, 10 Jul 2023 09:55:20 GMT

Hi!

I believe the software is struggling to cut the loft near the point.
Sometimes is "easier" to create a loft surface to create a boundary and split the solid.
It will take some extra time, but we can finish the task with success.

Re: Lofting substract doesn't work

berry.lejeune — Mon, 10 Jul 2023 10:05:33 GMT

@CCarreiras

I also thought that. but the strange thing is that when I make the loft and I choose to make the loft "join" i get a new solid but if I then change this to "cut" I get a failure

How did you get the surfaces? When I do the loft the box to choose surfaces is grayed out. I only have the solid box as an option

Re: Lofting substract doesn't work

CCarreiras — Mon, 10 Jul 2023 10:15:20 GMT

The problem isn't in the loft creation, the problem starts when Inventor is trying to cut the solid after the loft creation.

Loft + cut is a kind of two operation tasks: loft creation and boolean operation to cut the solid.

When you create a new solid, the software doesn't have to cut anything, it just creates the loft, and that's why there's no error there.

I'll attach the file to you examine the surface's creation.

Any doubt, just ask.

Re: Lofting substract doesn't work

berry.lejeune — Mon, 10 Jul 2023 10:17:27 GMT

@CCarreiras

thanks for the part. I'll look into it and try to make the other half of the loft the way you did it

Regards

Re: Lofting substract doesn't work

CCarreiras — Mon, 10 Jul 2023 10:25:53 GMT

I believe it's easier to create only one loft for all operations:

Check the file attached.

Re: Lofting substract doesn't work

berry.lejeune — Tue, 11 Jul 2023 09:04:22 GMT

Thank you @CCarreiras, this is what I needed. And now I know it for in the future