Although strain wave, or “harmonic,” gearing can deliver high reduction ratios in a relatively small form factor, it is well known that the technology also impairs the dynamic performance of robot arms due to elastic deformation that occurs even well below the drive’s rated torque.
Technical
Torque Density Consequences for Robot Arm Design
Torque density is the ratio of the rated torque of a transmission to its weight. Torque density is an especially critical parameter in robot arm design since the weight of the robot arm actuators become part of a distributed load that needs to be moved and positioned along with the primary robot payload.
