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Emergency Stop Categories (IEC 60204-1)

Trigger an emergency stop on a swinging robot arm under Category 0 (immediate power removal), Category 1 (controlled stop, then power off) or Category 2 (controlled stop, power held) and compare stopping angle, stopping time and post-stop drift.

Robotics & Kinematics3DModerate60 FPS📱 Mobile-adapted

A single-joint robot arm sweeps back and forth under motor control, a payload mounted at its tip. Press the E-stop button at any moment and watch the arm respond according to the selected stop category: Category 0 cuts power instantly and lets gravity and inertia decide where the arm ends up; Category 1 brakes to a stop at a bounded deceleration and then removes power, letting the arm sag afterward with no holding torque; Category 2 brakes the same way but keeps the drive energised so the arm holds its exact stopping angle. Live readouts track angular speed, elapsed stop time, the angle travelled while braking, and any post-stop drift, making the safety trade-off between speed of de-energisation and positional predictability directly visible.

⚙ Under the hood

Trigger an emergency stop on a swinging robot arm under Category 0 (immediate power removal), Category 1 (controlled brake, then power off) or Category 2 (controlled brake, power held), and compare stopping angle, stopping time and post-stop drift.

robot safetyemergency stopIEC 60204-1functional safetyactuator controlfail-safe

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install