The Origami Forum

Hi!

I wanna fold the models on this page http://mitani.cs.tsukuba.ac.jp/pukiwiki ... 1%BC%A5%C9 and from the book Jun Mitani - spherical origami but how do you transfer the curved lines from the diagram to your paper? Are there any landmarks for the curves? And how do you draw or mark them? (before folding).

well, have you tried placing the pattern and another piece of paper on your window/computer then tracing it? If it came out good, then try it again next time you make a cp. If not, I got another, yet messy thing to try to trace the cp.

Anine wrote:And how do you draw or mark them? (before folding).

Compass?

you could also try copying the image to a word document then print. trades time for tracing into cutting and printing. saves your moniter to.

anyways- it looks like if you start at the edge of the curve it looks like it's divided into 16 equal parts(check in paint if you want). if you "push" a pleat you can somewhat get a curve. it looks like it just takes practice.

I understand that Jun Mitami (and many other folders who employ specific and exact curved creases) use a craftROBO linked to a computer to trace and/or score out the patterns.

Otherwise it is impossible to get the clean sweeping lines neatly.

I would print the pattern out, place it over the paper I want to fold and draw along the lines with a ball-pen. I've also heard that completely empty ball pens can be used directly on the paper to score the lines. If you want to draw the lines directly you can measure out some points along the curve first and then try to connect them. There are several curved rulers available that make you life easier when trying to draw a perfect curve.

Thanks!
I guess I was a bit naive, thinking that she had made the model by hand and then just diagrammed it on the computer, but drawing the pattern on the computer and scoring it with a craftrobo was an AHA experience to me. That explains why many geometric models looks like they have been curved without any fingers touching the curved paper.

alternatively, just buy jun mitani's spherical origami book.

it appears it will be made available through passionorigami, but i know that both sasugabooks and kinokinuya bookstore in NY carry copies.

From what I understand of the book, it is not much more than what the website shows with the cp and whatnot...

InsomniacFolder wrote:I understand that Jun Mitami (and many other folders who employ specific and exact curved creases) use a craftROBO linked to a computer to trace and/or score out the patterns.

Otherwise it is impossible to get the clean sweeping lines neatly.

I've been surfing the net to see more about the robo craft, and as I can see you can only do up to A4 sized paper. I think her CPs are longer than that.. so still a mystery how she does it?

CraftRobo Pro does up to A3, or he may use a different machine (Lang uses a lazer scorer).

P.S. Jun Mitani is a man

There are several versions of CraftRobo. The Light version can only handle A4 sheets, the normal version can handle a print area that is up to 20.3cm x 100cm in size (max. paper width 21cm), the Pro version can handle up to 35.6cm x 50m (max. paper width 48.4cm). There are also versions that handle bigger paper like rolls of 60cm width and so on.

Some of the more complex models, such as the windmill, have the crease patterns "scratched" onto the paper surface using a laser printer but most of the models in that page are possible to fold without any special equipment. Some of the round models, like the spheres, may require a mold for the pre-creasing to fold them perfectly but they are possible to fold without.