12:46am | 12/20/2019
Jansen is a brilliant mind in the science and art of applied physics. He invented the mechanical motion for what he calls the Legsystem in 1991. Since then, his curiosity for kinetic art has compelled him to breathe life into a long lineage of fantastical "beests".
His viral enthusiasm has spawned similarly inclined artists, makers and engineers to apply the Legsystem mechanism in their own projects and creations. Check out Blaine Elliot's Strandbeest bicycle:
The mechanism itself is fairly straightforward, yet elegant. It consists of two rigid triangles held together at four hinging points. A single axis tips the top triangle back and forth, while the rigid members force the bottom triangle to move with a life-like gait.
Using Grasshopper, an "algorithmic modeling" plugin for Rhino3D CAD software, I generated this gif to illustrate the basic motion:
New domestic technologies (toasters, vacuums, food-processors, etc.) were marketed as tools to ease the burden of the cookiecutter housewife. Our own tool— for dismantling this stereotype— was named Rosie, after the robot from the 1960s The Jetsons...
Unlike the streamlined stainless steel and mold-injected plastics found in many of the products of the time, Brad and I decided to use mostly recycled or reused materials. Rosie's own "Legsystem" was built from salvaged wood trim and cabinetry pieces. The welded steel and plywood that make up the gearbox and axle were all scraps from our school's shop.
The pins at the two major axes of the Legsystem slide into half-inch diameter pipe, which was bent and welded to form an adhoc axle.
We mounted a 2.5 horsepower, cast-iron electic motor (purchased for $15 at a resale shop) on the back of a borrowed shopping cart to move the legs.
The motor spins a few bike chains through a series of laminated plywood gears and flywheels. A bit of graphite allowed the steel rods to rotate rather smoothly, propelling Rosie forward on her push-broom feet.
Up top is Rosie's new age "heart"— an Arduino Mega that is wired up on a breadboard to receive remote control signals. We used this helpful tutorial to find the IR codes from the oversized remote which switches on one of the solid-state relays— sending power to the ice-crusher, blender, or the motor.
In addition to the electronics and counter-top appliances, a soft pad of red shag produces a convenient and comfortable cradle for your baby.
Altogether, you have a personified domestic cleaning robot that would kick your Roomba's ass! Relax from the comfort of your couch with the remote in hand. Let Rosie prepare you a chunky smoothie as she gently vibrates your baby to sleep. Sweep away your troubles with this affordable, amazing product!
The glasses were from Halloween (I dressed up as Linda from Bob's Burgers), but we added them to give Rosie a more homely look. The steel bolt "eyeballs" looked a little too sinister on their own. Here's the final glamour photo. 👇