Why the Harmonic Reducer Is the Soul of a Humanoid Joint
Theodore Li 14 of Optimus's 28 rotary actuators use a harmonic reducer. The mechanism, the 30% tooth engagement, and the flexspline fatigue…
Theodore Li
Three Days, 21 Robot Stories: Orders Are Real, Prices Are Falling, Touch Is Entering the Policy
21 stories in three days: Leaderdrive humanoid reducer orders up 4-5x, Tesla's Optimus ramp, a Unitree H2-X fall, and touch…
China’s Whole-Body Tactile Race Draws RMB 100M+ Into MoSense
Two rounds in four months, investors that are also customers, and a body map of sensors from chest to sole.…
How to Pick a Harmonic Joint Module, Joint by Joint
Joint modules are 50-60% of robot cost. Encoder configuration, IP rating, hollow shaft and ratio mapped to each joint -…
42 Degrees of Freedom: A Hand That Outbids Shadow
Human hand 27 DOF, Shadow Hand 26, HONPINE up to 42. Why redundancy matters for learned policies, and the six…
HarmonicDrive vs Nabtesco vs the Chinese Challengers: Who Actually Ships Humanoid Joint Motors
Five suppliers, five different axes of competition. Why capacity and lead time belong in the comparison next to backlash -…
Robot Dogs Run on Planetary Joint Motors. Here Is Why
The 93rd Victory Day parade put quadrupeds in formation. The joint decision behind them is planetary, not harmonic - and…
Harmonic, RV or Planetary: Which Reducer Goes Where in a Humanoid
The reducer is 36% of a humanoid's cost and every joint wants a different one. How the three principles work,…
How Torque-Sensing Harmonic Drive Modules Are Perfecting Industry 5.0 Teamwork
Harmonic drive modules with torque sensor is changing the industry 5.0 teamwork ways