SERVO 05.2017 29
endless number of things that
needed to be replaced.
For this to work, I would need a
set flow of income so I could both
build the robot and buy the spares
because — and I can’t stress this
enough — you need to bring spares
As any veteran builder can attest
to, you always need spares that you
can quickly swap into the robot. So,
to be realistic, this robot in its base
form may be $200, but the overall
cost could be up to $300 for spares.
Fortunately for me, I was hired
by Terrapin Works (https://terrapin
works.umd.edu/) which is
essentially the hub of manufacturing
places at the University of Maryland
where I have access to 3D printers,
machine shops, etc. With solid
income, a place to work on, and the
tools to cut it, I was ready to go.
To begin this process, I started to
think of a design for this new robot.
My Antweight robot, Ferocious Mk.
IV (Figure 2) did well at Franklin
Institute 2016, where it took second
place in its division. From this design,
I rebuilt Ferocious into its Mk. V
version (Figure 3) as the first test of
learning how to use a mill (I may
write an article about its revision at
From its success, I decided to
make this new 12 lb robot a near
scale replica of Ferocious, but scaled
up four times (Figure 4).
Additionally, I decided to play off the
name theme of Ferocious, combined
with the fact this robot will be a
rough first attempt at a class I was
unfamiliar with. I decided to name it
While still in the designing stage,
I decided to ask around to fellow
builders and get a better idea as to
what a 12 lb robot would be like
since I was unfamiliar with this class.
Being able to ask other builders
for guidance is a fundamental
strength of the sport, and is what
allows relatively newer builders like
myself to a class to grow and
continue the progress of developing.
After this research, I began the
process of modifying and adding
more depth to the design by
introducing motors, electronics, and
even a model of the chain in the
Autodesk Inventor CAD assembly.
As the final design comes
together (Figure 6), the process to
assemble the first parts begins! Stay
tuned to SERVO Magazine and look
out for Part 2. SV
Figure 5. Final
Figure 4. CAD file
Wanna learn more about
electronics to help you in
your robot hobby? Check
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