The specification discloses a robot for inspection adapted to travel virtually unlimited distances through small-diameter enclosed spaces such as conduits or ducts, preferably using a fluid-driven screw-drive propulsion system. A reference point \u03b11 is set for the electric-charger-side data Ds on the basis of the variation in the rise rate of the electric-charger-side data Ds. A radially active force applying device pushes the pivoting parts outwards, causing the clamping jaws connected thereto to be pressed together. The thin type elevator hoisting machine is provided with the motor. The disclosed invention provides a cost effective and stable system for high volume manufacturing applications. The example method includes crediting the media as a media exposure if spillover did not occur.