Finally a working solution, although having to splash out £35 for a Maplins Bench Power Supply as suggested by a friend. It has the benefit of a variable voltage switch, but I had to ramp it all the way up to 12V before the Nichrome wire was hot enough to cut the foam. Hopefully it will be useful for other tasks. In the mean-time, I need to figure how to keep the wire tense so I can slice my 50cm wide foam boards. |