Sunday, December 10, 2006

The details of making D5h T240 b

After posting so many beaded toroids, I will describe briefly the procedure to make a D5h T240 b.

Of course, there are many different ways to reach a particular toroid. Among many different ways of weaving, I find it most convenient to separate the whole process into two phases. The first phase is to construct the inner rim with suitable arrangement of heptagons. Then after the inner rim is finished, we can start to weave the outer rim, which is the second phase of whole procedure. The details of weaving can vary each time, though.

Phase one: the weaving of the inner rim


a. Note that in order to make a D5h toroids, I have to put heptagons in the eclipse position.
From Craft Projects


From Craft Projects


From Craft Projects


b. Repeat the previous steps to get the whole ribbon of inner rim. There are ten heptagons in total.
From Craft Projects


c. Connect two sides of ribbon to finish the inner-rim structure.
From Craft Projects


Phase two: the weaving of the outer-rim


a. Extend the inner rim by one more strip of hexagons for both the upper and lower branches. Note that the pattern of large pentagons formed on both branches.
From Craft Projects


b. Connect the upper and lower branches gradually.
From Craft Projects


c. Finish up the whole toroid.
From Craft Projects

2 comments:

Colette said...

You are a genious !

Bih-Yaw Jin said...

Thank for your compliment. I am just an ordinary people. I did spend a lot of time on this subject. Chern also did a lot of works on bead models too.