Computer Numerically Controlled
Computer numerical controlled (CNC) stages on each side of a block of foam guide a tensioned hot wire to form a prismatic or tapered shape. This is a four degree of freedom CNC system (one each X and Y on each side of the foam block).
Accuracy is affected by the precision of the stepper motors, backlash of drive systems, and stiffness of the races supporting the end effectors which hold the tensioned wire.
Some CNC hot-wire cutters offer lathe attachments, which can be used with either stretched or preformed wire. Lathe attachments allow cutting of spiral shapes, and are often used to create concrete forms for ornamental and structural items, such as planters and stairway balusters and newels.
Read more about this topic: Hot-wire Foam Cutter, Types of Cutters, Tensioned Wire
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