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aluminum. My friend Yoshihiro Shibata is
helping me analyze DARwIn-OP's structure
to find its weak points when printed in plastic
(see Figures
19-12
and
19-13
). My plan is to
redesign only the parts that break, to make
them stronger, as I don't want to add unnec-
essary weight.
Figure 19-11.
Another humanoid robot design from
the Robotis assembly manuals
DIY vs. Commercial
To print the whole robot, I used two spools
of plastic that cost about $90 total. Shape-
ways's price is almost $1,000. That's close to
the price of many DIY 3D printers, and in my
opinion the quality of DIY prints is now 70%
to 80% as good as that of professional prints.
Still, I'm considering having all the covers
printed by Shapeways for about $400, as
they're the most difficult parts to get right.
Figure 19-12.
Analyzing DARwIn-OP's structure
What's Next
Next I'll download the control software to
the Fit-PC2 and get this robot to walk, talk,
and see, with as few modifications to the
software and hardware as possible.
I may need to redesign some of the brackets
and frames, because these were designed for
