Patent ID: 6145422
Filing Date: 2000-11-14
Classification: B23Q,B28D,Y10T

Abstract:
A system for positioning a work piece on a wire saw that has a plurality of wire rows formed by at least one wire, wherein a work piece held by a work piece holding member is pressed against the wire rows at a predetermined reference angle and said work piece is cut into a plurality of wafers by the wire rows, the system comprising:a tilting mechanism that rocks said work piece holding member in a plane parallel to a plane containing said plurality of wire rows;a contact device which is secured to said work piece holding member and contacts the at least one wire when said work piece holding member is rocked in a first direction to a first position by said tilting mechanism, and contacts the at least one wire when said work piece holding member is rocked in a second direction to a second position by said tilting mechanism; anda controller that obtains a first rotational angle when the work piece holder is at the first position and a second rotational angle when the work piece holder is at the second position, the first and second rotational angles being obtained based on said predetermined reference angle, and controls the tilting mechanism to position said work piece holding member at said predetermined reference angle based on the first and second rotational angles thus obtained.