Method for manufacturing wire saw apparatus and wire saw apparatus

A method for manufacturing a wire saw apparatus, the method comprising the steps of:

• providing a wire saw apparatus including:
• a wire supply reel from which a wire extends;
• a long roller having a surface on which the wire extending from the wire supply reel can pass;
• a plurality of wire guides around which the wire is spirally wound;
• a wire winding reel which winds the wire;
• and
• a tension arm which is arranged between the wire supply reel and the wire guides, controlled to move within a control angle of ±A (°) set in advance, and configured to apply tension to the wire,
• wherein the wire is configured to pass on the long roller while moving in an axial direction of the long roller;
• measuring a surface roughness Rmax of the long roller;
• measuring an angle a (°) of the tension arm at which the tension arm swings outside a range of the control angle set in advance while the wire is extending from the wire supply reel;
• calculating R1×2×A÷(|a|+A)=R2, where R1 (μm) represents the measured surface roughness Rmax of the long roller;
• and
• adjusting the surface roughness Rmax of the long roller to the calculated numerical value R2 or less.