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'[OT] Hot Wire'
1999\05\16@113922 by Wagner Lipnharski

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Hello forum members and friends,

I created a machine to cut 4'x8' styrofoam boards, using PC interface,
stepper motors control by Allegro chips, XY movement and so on, all
controlled by a microcontroller via serial communication.  To cut the
Styrofoam it uses a Ni-Cr wire, AWG 30 (0.01") that has 6.5 (or 6.75)
Ohms/ft, requiring from 1.4 to 1.6 Amperes to generate the correct
heat.  4 to 6 inches of this wire can be powered by a common wall wart
6Vdc/1.5A.
I found this wire is some places around in US, but there was always a
high cost per foot, so I was forced to buy a big reel. Each machine use
only few feet of them, it will take a "million" machines to consume the
reel, so I decided to offer part of the reel by foot to the forum
members.

20 feet (6 meters) is only $12 (USA), $13 (Overseas), packing and
shipping included (regular mail envelope).  If you are interested email
me for further details, (I also have a small quantity of stepper motors
I bought in excess).

Wagner Lipnharski

1999\05\17@093732 by Andy Kunz

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>20 feet (6 meters) is only $12 (USA), $13 (Overseas), packing and
>shipping included (regular mail envelope).  If you are interested email
>me for further details, (I also have a small quantity of stepper motors
>I bought in excess).

I can buy it for $9/20' from hobby supply places.

Andy
==================================================================
  Montana Design Tech Support - http://www.montanadesign.com
==================================================================

1999\05\17@110033 by Wagner Lipnharski

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Yeah, well, some hobby supply places I consulted they don't even know
what was the AWG number (or the resistance per foot) of the wire they
have, and they charge S+H. There is a company in California that has all
of this wires by foot, sell a minimum of $45 plus $5 S+H (cost almost
$1/ft).

Some interesting about professionalism;  Talking to a dozen of big
wire/cable supplier companies around in Florida, Georgia, even New York
and Chicago, the sales people do not have the minimum clue or idea what
means Nickel-Chrome or Nickel-Chromium wire. To help them to understand,
I said that exist several type of materials electric wires are made
from, as copper, steel, aluminum, brass, iron, ... and asking to the guy
what other material he knows (hopping he knows Ni-Cr by any other name),
he answered plain and simple: "Fiber Optics"!!!... I couldn't hold my
open laugh on the phone. The guy was serious.  He said "what!?!?".

Other company sales guy promptly asked all my company information (for
his database), and right after asked me to repeat (again) what I was
looking for, then he said directly "How many feet?", and then he
realized he had no idea what I was talking about (Nickel-Chrome). What
happened with people's brain and knowledge? I can expect this reaction
from a delivery pizza boy recently promoted to sales in a wire company,
but from a guy that works there at least 5 years and makes $18/hour?

Another big time company, more than 30 years in the market, selling all
kinds of wires and cables, heavy and small, communication cables and so
on, the sales people never heard about Nickel-Chrome wire (I heard he
asking loud in the room to the other sales people too). I asked the guy
how long he is been working in this field, he answered "16 years". I
just can't believe that we can call it "professionalism".  It is like to
sell only "yellow chew gum", and never heard about the other colors...
for several years... and they claim they are there to help you when you
call, because they are specialists... ok, they could be, but, about
what? It is not about electrical wires for sure!

I would love to say the names of those companies, but them, it would be
a lack of "my professionalism", isn't?

Wagner.

Andy Kunz wrote:
{Quote hidden}

1999\05\17@113425 by Andy Kunz

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>Another big time company, more than 30 years in the market, selling all
>kinds of wires and cables, heavy and small, communication cables and so
>on, the sales people never heard about Nickel-Chrome wire (I heard he

Of course not.  NiCr isn't used as "wire" or "cable" - it's a specialty
product.  That's why it costs more.

The same reason the guy in the electric supply store (or your local Radio
Shack <G>) doesn't know what an IC socket is.

Andy

==================================================================
  Montana Design Tech Support - http://www.montanadesign.com
==================================================================

1999\05\17@122416 by Gary Crowell

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Sad to say, the best answer I've found is not to deal with people unless
absoultely necessary.  In this case I would suggest http://www.mcmaster.com,
find wire, select resistance wire, & check the second .pdf page.
guages, resistance, and no know-nothings to deal with.

Gary Crowell
Micron Technology

Wagner Lipnharski wrote:
{Quote hidden}

1999\05\17@134033 by William Chops Westfield

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In the US, it's usually called nichrome wire.
If you're talking to the people who make communications cables and such,
it's not surprising that they don't know what you're talking about. They're
all worried about insulation displacement, twists per inch, shielding, plenum
rating, UL approval, and so on.  You need to backtrack to the people who make
WIRE out of METAL, not cables out of wire.  Probably you need to find someone
who specializes in somthing other than copper.

I've seen multi-thousand foot spools of "resistance wire" (which is NOT
nichrome, generally) for sale more often at metal surplus dealers than
electronics dealers, for instance.

$12/20feet is NOT a good price - if you paid anywhere close to that much
in bulk (ie by the pound, for 8oz or more of wire), then you really got
ripped off...

BillW

1999\05\17@155849 by wagnerl

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Now I got lost, which is the speciality of the company who sells Ni-Cr
wire?  I only found it in companies who sell wires, cables and heating
elements, not in drugstores, pharmacies or bakeries.

By the way, if I would sell fish, it would be good to know also about
whales, even if I don't have them for sale... right?  General
information and knowledge never did hurt nobody, it is good for business
and make people look a little bit different from monkeys.

It is so easy to change the car engine's oil, but 99.9% of the owners
don't have a minimum clue about how to change the oil filter, or at
least where is it. I call this laziness and lack of interest. A lot of
this people complain about lack of luck in life (read money here), while
in true they never were prepared for the real opportunities.

Wagner

Andy Kunz wrote:
{Quote hidden}

1999\05\18@103046 by Gerhard Fiedler

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At 15:54 05/17/99 -0400, Wagner Lipnharski wrote:
>Now I got lost, which is the speciality of the company who sells Ni-Cr
>wire?  I only found it in companies who sell wires, cables and heating
>elements, not in drugstores, pharmacies or bakeries.

i don't know to whom you talked, but you got me curious, and so i did a
quick search in yahoo and came up with a number of companies who at least
have this nichrome wire in their web sites -- a good indication that their
sales people at least have heard of it :)  or is it to these companies that
you talked to?

>By the way, if I would sell fish, it would be good to know also about
>whales, even if I don't have them for sale... right?

yes, maybe about whales, but how about some rare fish you and i have never
heard of? they maybe haven't either... :)

ge

1999\05\18@113339 by Wagner Lipnharski

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Gerhard Fiedler wrote:
> i don't know to whom you talked, but you got me curious, and so i did a
> quick search in yahoo and came up with a number of companies who at least
> have this nichrome wire in their web sites -- a good indication that their
> sales people at least have heard of it :)  or is it to these companies that
> you talked to?

Yes, for the Internet sake, those were the only ones I found.  I tried
several other from industrial supplier catalogs, yellow pages and other
sources... Internet saved the day :)

Ni-Cr wire is a little bit more industrial base than for example
magnetic wire, it was very easy to find 10 years ago, very few people
still rebuilding transformers and motors at home.

So repeating what someone said weeks ago; "If you can't find at
Digikey..."  :)

--------------------------------------------------------
Wagner Lipnharski - UST Research Inc. - Orlando, Florida
Forum and microcontroller web site:  http://www.ustr.net
Microcontrollers Survey:  http://www.ustr.net/tellme.htm

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