A 0.2mm wire is heated using a safe 10V source, and this heated wire cuts through the polystyrene, melting it and providing a clean cut. By varying the amount of voltage on the wire (and thus current), the wire temperature can be varied between 100℃ - 200℃ (212℉ - 392℉). | A 0.2mm wire is heated using a safe 10V source, and this heated wire cuts through the polystyrene, melting it and providing a clean cut. By varying the amount of voltage on the wire (and thus current), the wire temperature can be varied between 100℃ - 200℃ (212℉ - 392℉). |