Making Page Woody Mathematical Beadwork of 30 balls The manual of model making of 30 ball problem ( PDF 653KB ) |
no. |
||
|
[Instruction in general] Form a ring five beads in every step. Thread a pair of elastic cord braid through every bead in opposite directions. tips Easier to thread the cord after making its tip hard | |
|
Form another loop by adding four more beads to one of the five balls of the first ring.
| |
|
Thread the first five-ball ring with the other tip of the same cord so that a Y shape can be made at the intersection of the three balls.
| |
|
This Y shape stands good in every intersection made of three balls.
| |
|
Form a third five-ball ring by adding three more balls to the two rings earlier made.
| |
|
Here again, a Y shape is created at the three-ball intersection.
| |
|
Make sure there are three rings each of which are made of five balls.
| |
|
Form a fourth ring.
| |
|
In making a fifth one, thread the cord through the end ball of the adjacent ring three times.
| |
|
Form a sixth ring in the same way.
| |
|
Twenty wooden balls have been used so far. If a half-sphere has been formed, then you have worked out the procedure correctly. Ten more beads to go! | |
|
Add another three balls, making a seventh ring to the half-sphre.
| |
|
Repeat the same procedure so that the new five-rings will form the other half-sphere.
| |
|
This picture shows the last one ball is being added.
| |
|
Finally, see that a pair of elastic cord braid passes through every wooden ball. (If not, go back to the point without fail.) | |
|
When completed, tie the cord.
| |
|
Put a big ball inside the 30-ball sphere, stretching the cord blaid.
| |
|
Completed work. small diameter : 17mm large diameter : 38mm |
It returns to the first page. (to Ballstructure)
