The hotwire cutting machine (700) comprises a plurality of heated wires (701), springs (702, 702a), and grooved rods (703, 703a, and 1203) supported on end bearings (402, 403). The grooved rods (703, 703a, and 1203) are coupled to a motor (504) for rotating the grooved rods (703, 703a, and 1203) in the direction of wire movement due to thermal expansion. The wires are oscillated along their length by the to-and-fro rotation of a splined shaft (704, 1204). Existing solutions oscillate the entire heavy frame, resulting in vibrations and requiring heavy motors and drives. In contrast, the proposed hotwire cutting machine (700) minimizes the oscillating mass and allows for automatic adjustment of inter-wire distance/pitch. The composite cutting wire section includes a first wire (1209) with high mechanical strength and low electrical resistance, joined by manual twisting or welding with a second wire (1201), typically Nichrome, to withstand repeated bending cycles.

The hotwire cutting machine (700) comprises a plurality of heated wires (701), springs (702, 702a), and grooved rods (703, 703a, and 1203) supported on end bearings (402, 403). The grooved rods (703, 703a, and 1203) are coupled to a motor (504) for rotating the grooved rods (703, 703a, and 1203) in the direction of wire movement due to thermal expansion. The wires are oscillated along their length by the to-and-fro rotation of a splined shaft (704, 1204). Existing solutions oscillate the entire heavy frame, resulting in vibrations and requiring heavy motors and drives. In contrast, the proposed hotwire cutting machine (700) minimizes the oscillating mass and allows for automatic adjustment of inter-wire distance/pitch. The composite cutting wire section includes a first wire (1209) with high mechanical strength and low electrical resistance, joined by manual twisting or welding with a second wire (1201), typically Nichrome, to withstand repeated bending cycles.

A diamond wire cutting machine includes a spool on which a diamond wire is wound. The spool includes two end flanges having respective frustoconical faces adapted, by cooperation of shape with frustoconical faces of two adapters, to center the spool on an axis of revolution. A drum extends from one of the end flanges to another of the end flanges. The drum includes a cylindrical outer face of circular cross-section on which the diamond wire is wound. The drum defines a central hole through which a drive shaft passes. The drum and the end flanges form a single plastic block.

A diamond wire cutting machine includes a spool on which a diamond wire is wound. The spool includes two end flanges having respective frustoconical faces adapted, by cooperation of shape with frustoconical faces of two adapters, to center the spool on an axis of revolution. A drum extends from one of the end flanges to another of the end flanges. The drum includes a cylindrical outer face of circular cross-section on which the diamond wire is wound. The drum defines a central hole through which a drive shaft passes. The drum and the end flanges form a single plastic block.