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how to make home made foam cutter for slicing foam Answered

I dont have much electric knowledge ,but i have to make home made electric foam cutter for my kid ( he has to make some school project ) by cutting / slicing foam . i have pen type soldering iron / room heater etc. shall i made foam cutter from it , can i make room heater coil directly connect to steel wire to make it hot.please guide me ,it is very urgent .?

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iceng

Best Answer 7 years ago

This is simply the very best foam cutter ever made
by Dave Spencer

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sahil rajput

2 years ago

U can also use Car or bike battery

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icengsahil rajput

Answer 2 years ago

U can do anything, But to do neat cuts u will want to adjust for a current to match your HOT wire be it a Ni-Chrome wire or Welding Rod. Regrettably I did not record the voltage just the current.

Now my variac was set at 65 where the 85 setting represents line. Math ratio of 115/85 = output/65 delivers about 88 VAC which is then reduced by Stancor Transformer delivered 8.8 VAC to my weld rod wire.

This means a 12 VDC car battery would dangerously over heat the wire.

Any one reading this suggestion should be careful and perhaps use a larger diameter of wire to uptake the higher voltage and current from a car battery.

Be sure to click the pic to see the whole image.

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rickharris

7 years ago

How old is he. It is unusual for a teacher to set a project that requires special equipment.

Foam can be easily cut with a bread knife, sand paper will smooth it off.

If you really want to make a hot wire cutter you need some Nichrome wire (an old electric fire can supply) About a foot or two.

A spring to keep the tension as the wire heats up. and some plywood to make the frame.

use a 12 volt car battery NOT the mains supply

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atuldd44rickharris

Answer 7 years ago

i dont have 12 v. battery , kindly guide weather possible by 220 volt AC supply ,as commen in india. i have tried by pen type soldering iron ,wrap copper wire around it ,but it not working .

in your above dig. you have show that + and - connect directly to Nicrome wire.it will work , i think it will shortcircuit ?

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rickharrisatuldd44

Answer 7 years ago

No not 220 volts you will kill someone.

Yes Nichrome wire has a high resistance so depending on how long it is it will get hot but not short the battery.

In general these things draw a lot of current (that's why they get hot) so using a car battery is sensible.

Using mains is a recipe for severe injury.

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atuldd44rickharris

Answer 7 years ago

Thanks

i will go for 12 volt , ( by using transformer )

shall i use Room heater coil ( as Nichrome wire )

Ones again thanks

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Kitemanrickharris

Answer 7 years ago

I doubt the homework was set to require a hot-wire cutter. More likely the task is "make an X, to your own design".

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canucksgirl

7 years ago

What kind of foam are they cutting? (i.e. soft foam like used on a bed, or styrofoam)

Does it have to be a hot wire cutter or is anything acceptable? How old is he? Are there any safety considerations that need to be addressed?

It would help to have some more info...

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atuldd44canucksgirl

Answer 7 years ago

thanks dear ,
he is 9 years old , he has to cut thermocoal pieces for his project , he will not directly do the foam cutter ,i will make it for him.and take full safety measures.