Follow the parts. Change a control. See how a whole system responds.
These explanations connect an observable change with the mechanism behind it. Each includes an interactive model, a written walkthrough, source references and the assumptions that limit the demonstration.
← All explanationsBall bearings support relative rotation with balls rolling between inner and outer rings. The balls spin on their own axes while their centers travel around the bearing. A cage keeps neighboring balls separated. In this model, the outer ring is fixed and the inner ring turns, so rolling at both contacts makes the cage orbit more slowly than the shaft.
Explore the model and explanation →Explore how a brushless motor, planetary gearbox and position feedback work together in a robot joint. Separate fifteen components, follow the power path, and change the reduction to trade speed for torque.
Explore the model and explanation →