Make more than enough attempts to lower foam utilizing no matter what you’ve bought — utility knife, hacksaw, serrated plastic knife — and you’ll wish tough for some thing that cuts cleaner, more quickly, and better. Even though there are all sorts of ways to make a very hot wire foam cutter, this design from [jasonwinfieldnz] is equally attention-grabbing and imitable.
If you never now know it, nichrome wire is nifty things that’s readily obtainable in thrift retail outlet hair dryers and toasters. It stretches as it heats up, and shrinks as it cools back again down.
The intriguing component of this build is that instead of using a spring to maintain rigidity on the nichrome wire, [jasonwinfieldnz] designed and 3D-printed a bow out of PLA that does the job elegantly. When [jason] was initially anxious that the bow may possibly soften, he located in practice that although the bow does get warm to the contact, it is nowhere near scorching plenty of to even warp.
Just one nice contact is the easy fence that rides along two slots and secures with wingnuts. We also like that [jason] produced this foam cutter mainly from scrap product, and instead than obtain a spool of nichrome, he opted for a skinny heating factor and pillaging the wire.
If you are a nichrome noob, know that it doesn’t choose substantially juice to do the position. Even although a personal computer power supply is what [jason] had lying all-around, it is full overkill, so you would absolutely want to restrict the latest. Verify out the make video immediately after the crack.
However not moveable enough for you? All you really want is a 18650, some nichrome, and a handful of bits and bobs to keep it all alongside one another.