Tinymovr alpha: Production Update #2

A short update featuring a video that demonstrates the Tinymovr alpha Dev Kit in action: Torque tests go up to 10A due to absence of a good ventilation system, but extrapolated you should be able to reach around 0.6Nm at 30A. Tinymovr alpha is now closed, however I’ve open sourced the STL files for the Dev

Tinymovr alpha: Production Update #1

Here is the first update on the Tinymovr alpha board and Dev Kit manufacturing progress. I have received all R3.2 PCBs from the manufacturer. Around half of the received boards are assembled and tested, and they perform as expected. For the rest I am waiting for components to be delivered, expected towards the end of

Tinymovr R3 Update

Tinymovr R3 boards have recently arrived from China and I’ve been busy testing and improving things all over. Bottom line, they perform very well so far! The new MA702 encoder really makes a difference as angular position tracking is now super responsive and able to handle even the most vigorous accelerations. Due to the improved

Building a better 3D printer

Two years ago I made the unfortunate mistake of pledging for the Obsidian 3D printer campaign on Kickstarter. It turned out to be a really lousy investment, seeing that as of this point, more than two years later, nothing has been delivered and no real prospect of delivery of any sort of product is in

Designing a Brushless Quadruped Robot

Brushless motors are changing the landscape in robotics. Coupled with precise closed-loop control, they are able to deliver excellent power to weight ratio but most importantly, they are transparent in the sense that external forces acting on the mechanism are reflected on the motor and vice versa. This leads to mechanisms that are actively compliant,

On ankle mechanics

Stand up on your toes. If you stay there for a while you’ll feel your calf muscles tension. Precisely how much force are the calf muscles exerting on your feet? This is an important question in designing humanoid robots, as the answer largely affects component and motor sizing of the robot. The human foot, simplified