Abstract: A motor-driven articulated haptic interface arm includes a frame; an arm linked to the frame and rotationally mobile about an axis; and a motor including a rotor, which delivers at least one maximum resistant torque about the axis opposing at least part of forces applied to the arm by its environment. A main transmission transmits to the arm the resistant torque about the axis and includes a capstan-type cable reducer. The arm includes elements for evaluating the resistant torque transmitted to the arm by the motor; braking rotation of the arm about the axis; activating the brake when the maximum resistant torque is reached by the motor; evaluating, after activation of the brake, the forces transmitted to the arm by the environment, including determining a deformation of the transmission under the forces; and deactivating the brake when the deformation goes below a predetermined threshold value.

Abstract: A motor-driven articulated haptic interface arm includes: a frame; an arm linked to the frame and rotationally mobile about an axis; and a motor, which delivers at least one torque about the axis countering at least one part of forces applied to the arm by its environment. A main transmission transmits the torque to the arm and includes a capstan-type cable reducer, and an auxiliary transmission transmits the torque to the arm. The auxiliary transmission is capable of taking at least two states: an inactive state, when the forces applied to the arm by its environment are below a predetermined threshold, in which the auxiliary transmission transmits no torque to the arm; and an active state when the forces applied to the arm by its environment are higher than a predetermined threshold, in which the main transmission transmits no torque to the arm.