Just launched on the Wevolver platform from Jochen Alt:
Jochen Alt has designed a high torque retro-futuristic industrial robotic arm, which he calls Walter. Instead of using servo motors like most DIY robotic arms, Jochen’s project uses NEMA stepper motors with a belt drive and a separate angle sensor to compensate for the relatively low precision of 3D printed parts.
The result is a 3D printable robotic arm with far greater torque and accuracy than would otherwise be possible. What’s more, Jochen spent four months refining Walter’s software, making the full stack including trajectory planning to achieve a smooth speed profile; Walter in action looks amazing.
Jochem cites the Thor project by from Ángel Larrañaga Muro as a source of inspiration. You can find out more about the Walter robot arm here.
Most DIY robots use servos for convenience since the encoder is already built-in and they are easy to control. The problem is that when it comes to higher torque the connection of the servo with the actuator becomes difficult to maintain with 3D printed material. If the servo or the flange moves just a little bit within the housing, the according play magnifies to a significant amount at the end of the actuator. Unfortunately, the required precision to avoid this is way above hobby grade components.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Undercover in an iPhone Factory (video)
Wearables — Go with silicone
Electronics — Shift away from basic arithmetic
Biohacking — Bunnies Book “The Hardware Hacker” Applies to Biohackers
No comments yet.
Sorry, the comment form is closed at this time.