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I make my own with woodland scenic nichrome wire (little replacement packs for their cutter). Just make a frame to stretch it and hook up and old DC power pack and turn the speed knob up till it cuts as desired, too much speed makes the foam smoke so slow down a bit if that happens. Making them this way allows very wide versions to be made so sheets of foam can be tapered for slightly sloping areas....DaveB

I have the Hot Wire Foam Factory, it's got lots of miles on it.  I've replaced the wire once, and I push it with a train transformer rather than the anemic wall wart that came with it, that allows me to adjust the cutting speed as well as for the material I'm cutting.  I have a roll of nichrome wire that I got for when the spare wires died, but I've yet to use it, and I still have two of the three nichrome wires that came with it.  You must really be pushing the power to smoke them within a week!

 

 

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