With the rise of **3D printing technology**, once-unimaginable concepts are now becoming tangible. This innovation has inspired a wave of creative artists around the globe, who are exploring new frontiers and offering people a glimpse into a world full of imagination and possibility.
Alex Crease is more than just an engineer—he's also a musician and an adventurer. He describes himself as someone who enjoys building things but also likes to take them apart to understand how they function. Alongside three other students, he manages the **3D printing** space at Olin Engineering. His passion for robotics led him to become a leader in the school’s **3D printing** lab, where he continuously experiments with new applications for **3D printers**.
While Alex is currently working on a groundbreaking 3D printing technique called “co-processing†and shares his progress weekly on his blog, this article focuses on something more playful: a simple yet clever robot known as the **PulleyBot**. Designed to be driven by a belt and pulley system, the PulleyBot uses friction to move, making it both efficient and fun to build.
Before starting the project, you’ll need a few basic tools: a small screwdriver, a wire stripper, a 0.05-inch hex wrench, a 3/32-inch hex wrench, solder and a soldering iron, super glue, a hacksaw or band saw, a **3D printer**, and some grease. Once you have everything ready, the real fun begins.
Crease used a MakerBot Replicator 2 to print all the necessary parts at standard resolution, which took about 5 hours and 45 minutes without needing any support structures. When assembling the pieces, he recommends applying a bit of grease or spray to the axles or axle holes to minimize internal friction and ensure smooth movement.
To determine the direction of the PulleyBot’s motion, simply power on the motor and observe its rotation. A component called the Large_Drum, attached to the shaft, will rotate in the same direction as the motor. If you want to adjust the speed, you can change the position of the O-ring on the pulley. Moving it to a larger-radius groove will increase the speed, while switching it to a smaller one will slow it down.
This simple robot not only demonstrates the potential of 3D printing but also highlights how accessible and engaging DIY projects can be when combined with creativity and curiosity. Whether you're a hobbyist or a student, the PulleyBot is a great way to dive into the world of mechanical engineering and 3D design.
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