Work out two hand control distance instantly with clear inputs, formula shown and shareable results.
A two hand control must be far enough from the hazard that an operator releasing it cannot reach the danger zone before the machine stops. The distance is K x T plus an additional 250 mm, because the hand starts at the control rather than at a detection plane and the operator can begin moving before fully releasing.
Minimum distance
S = 1600 x total stopping time in seconds + 250 mm
Preliminary estimate only. Two hand control design and positioning must follow the applicable machinery safety standards and be verified by a competent person.
S = 1600 x total stopping time in seconds + 250 mm. A two hand control must be far enough from the hazard that an operator releasing it cannot reach the danger zone before the machine stops.
That is precisely the design concern. Controls must be spaced so they cannot both be operated by one hand or an elbow, and simultaneity timing must be enforced by the control system.
This calculator takes 3 inputs: Machine stopping time, Control system response time, Assumed hand speed. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.