Egg-Bot is an
robot, just in
time for Easter.
It uses two
for Egg-Bot is
you have a
that can control two Hitec hobby
servos simultaneously, you can use
it instead. Graphic designs and/or
text is programmed into Egg-Bot
using the GUI interface of the
SMC-04 USB controller.
by John Iovine
FIGURE 1. Platform layout drawing.
The inspiration for Egg-Bot began with a visit to
Bruce Shapiro's motion control website at
www.taomc.com/home.htm. If you have a
chance, visit this site to see his excellent work.
Egg-Bot may be purchased as a kit or built from
scratch, while the key components may be purchased
separately. In this article, we will assume you are building
it from scratch and the instructions are based on that
premise. The kit version of Egg-Bot is shown in the Parts
List. Egg-Bot is built on a square
6. 75" x 6. 75" 3/4" thick wood platform.
Component placement locations are shown
in Figure 1. Brackets (see Figure 2) ease
positioning and placing the servos on the
platform. Location of the brackets are
taken from one corner of the platform, so
if you have a larger base you can still locate
the positions accurately. Corner 0,0 is the
lower right-hand corner as shown in Figure
1. Use that to transfer the measurements
onto your wood platform.
The back plate is made from 3" x 3" x
1/8" thick acrylic plastic. It is held to the
platform with two 1/2" brackets. Mount
these brackets on the platform using two
#4 x 3/4" length wood screws. Position the
plastic back plate up against the brackets
to mark the hole locations. Drill holes in
the back plate and mount it to the brackets
using two 6-32 machine screws and nuts
(see Figure 3).
Next, mount a Hitec servos inside a
bracket using 6-32 machine screws, nuts,
50 SERVO 03.2009