Using Loft

[DrC]

I am trying to design a sheath for a pair of scissors to stop them poking a hole in my pocket. My design is an elliptical hollow cone but I'm having a lot of difficulty making it.

So I am starting with a solid ellitical cone and will 'subtract' a similar one once I have sorted out how to do it.

Half of the solid cone seems to be OK but the other half doesn't. What am I doing half wrong?

Thanks for any help - it's much appreciated.

OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.23141 (Git)
Build type: Release
Branch: master
Hash: 0eba78d40096720f7a637a9a73c382a08b820bca
Python version: 3.8.6
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United Kingdom (en_GB)

ScissorSheath.FCStd

Ellipse and the required lofting profile

(18.77 KiB) Downloaded 71 times

[Bance]

A loft transforms one shape to another. It would appear the model represents a sweep of some sort.

A sweep takes as input a profile and a path. A triangle is not a suitable path.

I suggest you refer to the wiki.

[mhalil]

Hi,
Would the following design be useful to you?

ellipse dimensions:
major: 6mm
minor: 3mm
distance from origin: 120 mm

thickness: 2mm

if you want, you can change all the dimensions according to your wishes

[run_the_race]

I found this video very helpful on explaining lofts: https://www.youtube.com/watch?v=jP5dCB6FDpo
Maybe you already know how to use it.