Patent ID: 6736019
Filing Date: 2004-05-18
Classification: B25J,G05B

Abstract:
A monitoring device for checking for a predefined position of a body or for checking for the presence of a body, comprising:a pivotal checking element for checking for a predefined position or presence of a body; a shaft for driving the checking element; a motor for driving the shaft and thus the checking element; and a control device for controlling the motor to control the pivotal movement of the checking element; wherein the control device includes a control loop that controls the pivotal movement of the checking element in dependence on time in accordance with a pre-defined pivotal position-time course such that the checking element is positioned at any location along said course at a predefined time independent of any frictional moment exerted on the shaft, and wherein the pivotal position of the checking element relative to a starting position is known at every time in the pivotal movement of said checking element.