Patent ID: 6968625

Claim:
A belt pulley system, including a device for alignment of a first power transferring belt pulley and a second power transferring belt pulley in a predetermined relation to each other by measuring parallel, angular, and twist errors between the pulleys, comprising: a first measuring unit arranged for mounting on said first belt pulley and comprising a laser device for generation of laser radiation with a predetermined pattern in a direction towards a second measuring unit arranged for mounting on said second belt pulley and comprising a second laser device for generation of laser radiation with a predetermined pattern in the direction towards said first measuring unit, wherein each of the measuring units comprises a detection device for emitted laser radiation, wherein each laser device is adapted so that each laser radiation pattern is in the form of a line pattern, each line pattern extends perpendicularly to the plane defined by the peripheral operable face of the respective belt pulley from a point within the width of the peripheral operable face, wherein each of the measuring units comprises at least one reference component which during said alignment is connected with a predetermined position on each belt pulley, and wherein the measuring units are mounted only on the outer, peripheral operable face of the respective belt pulley, the measuring units measuring parallel, angular, and twist errors in alignment between the first power transferring belt pulley and the second power transferring belt pulley.