5. ASSEMBLE THE LIFTING ARM
Slide the lifting arm over its supporting arm
on the top plate, as shown in Figure
H
.
Attach the servo horn to the output shaft
of the servo. The servo horn is a component
that connects to the output shafts splines
(like gear teeth), which allows you to transfer
its power to something else. Slide the servo
directly into its mounting area. It should sit
snugly next to the lifting arm (Figure
I
).
Attach M3 bolts through the lifting arm into
the servo horn (Figure
J
). Due to the servo
horn’s design you will need to insert one
screw first then attach the second one after it.
You may need to trim screws to fit exactly.
6. SCREW IT ALL DOWN
Screw the servo into its mounting holes in the
top plate, using the four #6×½" Plastite screws.
Attach the wheels to the gearmotor
shafts by tightening the Lite Hub setscrews
using the 0.050" hex wrench.
Finally, attach the top plate to the robot
chassis using the five #4×⁄" Plastite screws
(Figure
K
). Enjoy your completed Kerfuffle!
READY TO RUMBLE!
So now that you have a completed machine,
what do you do with it? First, practice with your
robot. Turn it on, using the ⁄" hex wrench to
screw down the mini power switch. Use the
transmitter’s right stick to move the robot (front/
back and left/right) and the left stick to move the
lifting arm servo (up/down).
Practice driving. Get the hang of how your
robot drives, and become accustomed
to how it moves — this will allow you to
compete more effectively later on.
Do figure-8s — it’s a great way to get
used to the robots steering as well
as get a good read on its speed.
Practice fighting. Because this machine
has no dangerous spinning elements,
you can easily build clones of it and
hold mini sumo competitions where
you have timed skirmishes and try to
out-drive and out-fight each other.
To attack, approach a raised area on
your opponent. Because Kerfuffle relies
ROBOT RUMBLE! DIY Plastic Antweight
H
I
J
K
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48 makezine.com
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