Wooden elements of decor are present in the houses of each of us. Sometimes we go to the store to purchase a beautiful wooden frame or box for home or as a gift to loved ones, friends and relatives. However, the best gift is a handmade gift, and in order to make a beautiful frame or box we need a cutter or a nichrome jigsaw, which we will do right now.
Watch the video on how to make a nichrome cutter:
[media = http: //www.youtube.com/watch? v = DuKzOuVNqHQ]
So, for the manufacture of the cutter, we need a 12 volt 5-10A power supply (you can use a computer unit), a nichrome wire with a cross section of 0.4-0.8 mm (you can disassemble a wire resistor or the same boiler that uses a nichrome thread), two pieces of a cut branch , of which we will make handles, a copper wire 1-1.5 m long, as well as two nails or two pieces of stiff wire.
The first thing to do is take care of the pens. To do this, it is necessary to drive a nail into pieces of a branch or insert a wire. For convenience, it is better to use a branch from a tree of soft breed. When the wire or nail is pushed through, take the pliers and make rings from the sticking parts of the wire so that the wire itself, as well as the wires, do not slip when twisting.
The next step is to take any yellow and black wires from the power supply and connect them to the copper wire, which in our torch will be the main one, not forgetting the need for insulation of the wires.
When you turn on the power supply, it will not start immediately. If you are using old models of computer units, you can separately install the switch by connecting the green wire to any of the black ones. With new models everything is much easier: it is enough to use the usual paper clip to short the same two wires for a split second.
The time has come for the most crucial part: the selection of the correct length of a nichrome thread. In order to do this, you can use a special formula, but there is also a simpler method, which is known as the poke method. The desired length of the thread can be determined by wrapping it on a wooden block, connect the plus wire to one end and gradually bring the negative wire from the other end until the thread starts to turn red.
Attention!!! If the length of the nichrome thread is incorrect, the power supply may overload and fail, and the thread may break off quickly.
After calculating the length of the thread, it remains only to cut off its excess part and wrap two rings on two handles. The other rings should be wound wire from the power supply.