Abstract: A cone crusher shaft position measurement sensor arrangement is arranged for measuring a position of a crushing shaft of a cone crusher that has an inner crushing shell supported by a crushing head mounted on the crushing includes a target means arranged to be connected to the crushing shaft and to move in a horizontal plane in concordance with the movement of the crushing shaft. The target means includes a sensor target. The sensor arrangement also includes at least one first sensor element for sensing the horizontal position of the sensor target.

Abstract: A method for detecting tramp material in an inertia cone crusher having an outer crushing shell and an inner crushing shell is provided. The inner crushing shell is supported on a crushing head. The crushing head is rotatably connected to an unbalance bushing. The unbalance bushing has an unbalance weight for tilting the unbalance bushing when it is rotated, such that the crushing head will gyrate about a gyration axis, the inner crushing shell thereby approaching the outer crushing shell for crushing material in the crushing chamber formed therebetween. The method includes the steps of measuring at least one of a position and a motion of the crushing head; obtaining, based on the measurement, a gyration value; comparing the gyration value with a gyration reference value; and determining, based on the comparison, whether to issue a tramp material warning signal indicating the presence of tramp material in the crusher.

Abstract: A method for detecting tramp material in an inertia cone crusher having an outer crushing shell and an inner crushing shell is provided. The inner crushing shell is supported on a crushing head. The crushing head is rotatably connected to an unbalance bushing. The unbalance bushing has an unbalance weight for tilting the unbalance bushing when it is rotated, such that the crushing head will gyrate about a gyration axis, the inner crushing shell thereby approaching the outer crushing shell for crushing material in the crushing chamber formed therebetween. The method includes the steps of measuring at least one of a position and a motion of the crushing head; obtaining, based on the measurement, a gyration value; comparing the gyration value with a gyration reference value; and determining, based on the comparison, whether to issue a tramp material warning signal indicating the presence of tramp material in the crusher.