Patent ID: 7610660

Claim:
An apparatus on a drafting system of a spinning room machine, for weighting a drafting system roller, the apparatus comprising: at least one pressure-medium system including: a pressure-medium cylinder; a piston acted upon by a pressure medium and axially movable inside the cylinder; and a piston rod connected to the piston and passing through an end of the cylinder to apply weighting to the roller, at least one inductive displacement sensor disposed within the pressure-medium system and configured to detect movements of the piston in two directions and produce a corresponding output signal; an evaluation device coupled to the output signal and producing a displacement signal corresponding to a measured displacement of the piston; and an electronic control and regulation device coupled to the at least one inductive displacement sensor and configured to receive the displacement signal, wherein the electronic control and regulation device is adapted to compare the displacement signal to stored predetermined maximum and minimum values relating to allowable lap formation on the roller and wear to the roller, respectively.