Make plenty of attempts to slice foam utilizing no matter what you have received — utility knife, hacksaw, serrated plastic knife — and you will want tough for a thing that cuts cleaner, speedier, and improved. Whilst there are all sorts of ways to create a hot wire foam cutter, this design and style from [jasonwinfieldnz] is both attention-grabbing and imitable.
If you really do not by now know it, nichrome wire is nifty stuff that’s quickly out there in thrift shop hair dryers and toasters. It stretches as it heats up, and shrinks as it cools back again down.
The exciting part of this create is that in its place of utilizing a spring to retain rigidity on the nichrome wire, [jasonwinfieldnz] made and 3D-printed a bow out of PLA that does the task elegantly. When [jason] was at first worried that the bow might maybe melt, he found in observe that although the bow does get warm to the touch, it’s nowhere near scorching sufficient to even warp.
A person good touch is the very simple fence that rides alongside two slots and secures with wingnuts. We also like that [jason] produced this foam cutter mainly from scrap content, and instead than acquire a spool of nichrome, he opted for a skinny heating aspect and pillaging the wire.
If you’re a nichrome noob, know that it doesn’t take substantially juice to do the occupation. Even though a computer electrical power supply is what [jason] had lying all around, it is total overkill, so you would absolutely want to restrict the present-day. Look at out the construct video clip just after the crack.
Continue to not transportable more than enough for you? All you truly want is a 18650, some nichrome, and a handful of bits and bobs to maintain it all with each other.