[Howto]: Opposition of Lobel frames

[Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:17 pm

Here is the step-by-step construction of a shape made from 2 Lobel frames placed in opposition, as presented in this topic.

This one starts from a heptagon.
Apply exactly the same approach if you want to start from a triangle, a square, a pentagon, a hexagon, or even an octagon (for this latter, you will have to place larger spheres at the ends because the angles are too closed at the junction of the 2 Lobel frames).

20210517_211930_redimensionner.jpg

20210517_212026_redimensionner.jpg

20210517_212137_redimensionner.jpg
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric

Re: [Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:18 pm

20210517_212333_redimensionner.jpg

20210517_212428_redimensionner.jpg


At this stage, as the surface obtained is not flat, it is necessary to start raising the edges which start from the vertices of the base polygon (here the heptagon).
We begin to give the wavy shape.

20210517_212717_redimensionner.jpg
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric

Re: [Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:25 pm

20210517_212935_redimensionner.jpg

20210517_213027_redimensionner.jpg

20210517_213318_redimensionner.jpg
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric

Re: [Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:36 pm

We just made 3 rows of triangles around the base polygon.
This number of rows must imperatively be odd (1, 3, 5, ...).
This allows to put in opposition the 2 Lobel frames, by applying a rotation of one relative to the other, to align the vertices of one with the edges of the other (and vice versa).

Now it's time to start closing the shape by building the second lobel frame.
20210517_214036_redimensionner.jpg

20210517_214148_redimensionner.jpg

20210517_214318_redimensionner.jpg
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric

Re: [Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:42 pm

20210517_214500_redimensionner.jpg

20210517_214607_redimensionner.jpg

The tricky part is successfully closing each new row of triangles by reshaping the shape to give it its final volume.
Remember that the bumps on the bottom surface are opposite the hollows on the top surface. And vice versa.
20210517_214835_redimensionner.jpg
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric

Re: [Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:45 pm

20210517_215055_redimensionner.jpg

20210517_215657_redimensionner.jpg

20210517_215825_redimensionner.jpg

And There you go :D
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric

Re: [Howto]: Opposition of Lobel frames

Postby Eric » Sun Feb 26, 2023 9:49 pm

With the final color scheme 8-) :
20210517_223300.jpg

20210518_094141_redim.jpg

20210517_230146_redimensionner.jpg
User avatar
Eric
 
Posts: 191
Joined: Fri Nov 13, 2020 11:19 am
Location: France
Real name: Eric


Return to Construction challenges, instructions and projects

Who is online

Users browsing this forum: No registered users and 1 guest

cron