Robert J. Lang - Tarantula (Insects II)

[Razzmatazz]

I have a problem with Steps 17-19 as it popularly seems. Anyone can help?

I can get it to look like Step 18 easy, but then when carrying out that step, I just need a progressive picture of that fold and I should be good at figuring the rest out.

[booggerboy]

Hey Razz,

Did you look at:

http://www.fb-developers.info/origami/d ... a&pic=0031

That's just after step 17, getting ready to unsink the next layer. You should be fine once you've done one layer correctly, the others are the same drill. Not sure if I refolded it and took pics they'd be better than the one above!

BB

[Razzmatazz]

Thanks for the reply. But I get that, then when I start doing the others, they don't work out and start to crumple.

For step 17, you pull out also the bottom half of the diamond. Do you do that on the next two un-sinks as well? That may be my problem.

[booggerboy]

You pull out the bottom half in 17, but then it's out (so you don't have to do it for 18/19).

Each unsink is pulling out "from the bottom", to turn the concave corner (where the unsink arrow starts) into a convex corner on the left. 18 is the trickiest one, cos there's a flap - but it's the corner under the flap you need to unsink.

I just tried to take some pictures (I found an old half-complete model to play with), but it is quite a fiddly thing to show. Each time I'm squeeze/rolling the paper out with slightly damp fingers and the "halfway" pics are just a mess to decypher. Plus the paper had performed the move a few times before, so kinda just popped into place.

btw - here's a quote from Baltorigamist describing how to create a bird base in the middle of the paper:

"Collapse it as a waterbomb, fold a rabbit-ear, and unsink the layers (1 open followed by 2 closed). Robert Lang uses this pretty heavily in his designs, and I've even used it a few times."


bb

[Razzmatazz]

Okay thank you, booggerboy. I'll try this. But you have been great help whether this works or not

Edit:
Sort of tried it again.

http://i39.tinypic.com/2lx8ewp.png

These are the layers starting from the far left layer flipping them over (except 3 is of the inside of 2). I think I skipped 18 and did 19 for some reason. I showed a few details of other flaps. Sorry for blurry photos.

Should there be four layers on top? If so, where would the other one come from?

[booggerboy]

Ok.

You are getting 18 wrong, as you should end up with a bird base with 4 flaps. When you do 18 try and put the valley fold where Lang has drawn it, and treat the too layers of the unsink as if they were a single layer. I think that's what Balto means when he says closed unsink.

bb

[Raptorex55]

This should help, if it doesn't and you still can't get I can fold this model again and take photos of that particular step.
http://m.youtube.com/index?desktop_uri= ... qp6wK2CB3Y
The video is legal as permission was granted by Dr. Lang himself for this.

[Boonwagon]

http://www.youtube.com/watch?v=4qp6wK2CB3Y Here's a tutorial I found on the internet The REAL tricky steps are unsinking, and sinking.

[Boonwagon]

http://www.youtube.com/watch?v=4qp6wK2CB3Y Here's a tutorial I found on the internet The REAL tricky steps are unsinking, and sinking.