Patent ID: 7108208
Filing Date: 2006-09-19
Classification: B02C

Abstract:
1. A method to control a crusher which comprises a replaceable first crushing member having a first crusher surface and a replaceable second crushing member having a second crusher surface, which crushing members are arranged to be brought toward each other in a reciprocating motion to crush, between one another, a material that passes between the crusher surfaces in a direction having a vertically downwardly directed direction component, said method comprising: defining the co-operation of the crusher surfaces by at least one crusher setting parameter, measuring at least one quality parameter, which relates to the nature of the crushed material, on at least two different occasions during the service life of at least one set of replaceable first and second crushing members and on each occasion for at least two different settings of the crusher setting parameter, and utilizing the measured quality parameter for said set of replaceable crushing members for determining a control function that describes a value, of said at least one crusher setting parameter, which on a given occasion gives a crushed material the quality parameter of which is substantially optimal, and utilizing the control function for adjusting the crusher setting parameter for a subsequent set of replaceable first and second crushing members in such a way that on a given occasion for the subsequent set of replaceable crushing members, a crushed material is obtained said quality parameter of which being substantially optimal.