Thursday, October 29, 2015

R2-IQ - Starting the build

Building R2-IQ

I've been given the green light to build an R2-D2 out of VEX IQ.  The current working name is R2-IQ, and my target completion date is 50 days from now, on December 18, 2015.

The plan is to build a full-sized astromech that can be driven by remote control, and has the ability to switch between standing on 2 legs to 3 legs and back to 2 legs.  It will be able to drive when on 3 legs.  I haven't decided if I want it to drive when on two legs.

The Body

The first challenge is creating the shape of the body.  I tried out a couple ideas in SnapCAD (VEX cad software) to see where I got the best round shape.

My first try was image #2.  The shape and size were very good (the body is just over 18" in diameter) however when I went to build it, I realized the pieces on the skin would not fit, because they were overlapping by about 1/2 inch.  (silly drawing mistake)

The second version (#17) was the perfect shape, but not the best size.  This version has about a 21" diameter.

Version #3 (image #1) has a less-perfect shape, but a better average diameter.  (~18.5")  This one will be a little harder to build, because of how some of the pieces will overlap.

I think the slightly larger diameter body will actually take less pieces internally, but I haven't decided, yet, if I want the better shape, or closer diameter.