Fuel:
Alcohol Running Time: 15 min Arm: Tandy Armatron
Info:
After having some success hacking
together complex r/c
steam machines,
many people have called my creations
robots, while others say they are not
true robots..... I really don't care what people call them, as long as
they get a kick
out of my silly hobby. But this one would be hard to define other than
a
Steam Powered Robotic Arm.
About Armatron:
Armatron was my favorite toy as a kid, it was made by Tandy, and
sold
through
Radio Shack in the 80's. It was made with ONE electric motor, with
gears
and clutches throughout
the entire base and arm, controlled by 2 joysticks that
engages and disengages
gears for 6 degrees of movement (the joy stick
each move in 2 axis, plus they twist
for closing/opening of the jaw, and rotating
of the hand). This complex machine is a marvel
of engineering, the amazing
control and ease to operation made this toy amazingly fun
to play. This particular
one was found at a flea market, haggled down to half price, from two
bucks down to
one dollar.... the best deal I've ever gotten at a flea market!
Jensen is the last remaining steam engine company made in the
USA, with
a
history of over 70 years. Jensen products ranges from hobby engines,
to amazing collectors
engines. Recently they even released a steam
turbine engine!
Jensen donated this model 75 to me after seeing some of my creations.
They've
sponsored me to make whatever I can come up with using their
engines - how cool
is that?!!! I'd like to give thanks to everyone at Jensen for this
opportunity and
supporting the arts.
The
Hack:
( There are no electronics or batteries! ) This is a pretty simple hack job
compared to most of my creations. I simply
removed the single motor, and other gears not related to the actual
operation
of the arm, and attached a drive shaft with a pulley. Holes were
cut on the side
of the base to allow a steam engine to power it. I first used
sprockets, but it
proved to derail too easily, due to the length of chain that it was
required.
I ended up using a pulley and rubber band and it worked like a charm.
Sprocket and drive shaft where the motor used to be
Jensen #75 is a beast, providing super high RPM and torque to move the
arm at a fast pace. I usually have to gear down engines to move itself
along,
but being stationary and having the robotic arm already geared for a
electric
motor, I was able to gear the Jensen for super fast RPM - as seen on
the
large pulley attached to the engine.
Rubber band and pulley test
Final Jensen Armatron: I
attached the Armatron and Jensen to a wood base, and painted them
with
heat resistant, and plastic paint. I also routed the steam exhaust
into the chimney
under the Jensen base.
The technology in this Steam Armatron is completley mechanical:
gears, clutches, pulleys, steam power... Victorian technology
that could have
developed a couple of hundred years ago. You've seen enough Steampunk
movies, but this is a real working steampunk robot.