Alt-BEAM Archive

Message #06924



To: beam@sgiblab.sgi.com
From: Bruce Robinson Bruce_Robinson@bc.sympatico.ca
Date: Tue, 19 Oct 1999 22:23:57 -0700
Subject: [alt-beam] Re: PCB etching


Sathe Dilip wrote:
>
>... Have you tried the waxy base paper
> used for (what remains after you remove
> the) stickers? May be that will provide
> better separation and transfer of toner
> while ironing?

But read your printer manual first!!

My LED printer hates that stuff -- as in, it wipes out the print engine.
It seems the heat that seals on the toner also melts the wax -- onto one
of the drums.

On the other hand, my computer dealer has a couple of laser printers
that don't seem to care.

Regards,
Bruce



6925 Tue, 19 Oct 1999 22:24:02 -0700 [alt-beam] Re: Piano Wire .... beam@sgiblab.sgi.com Bruce Robinson Rik wrote:
>
> ... is it actually a piano String?? ...
> i have been experimenting with guitar
> string...but it's a bit to expensive
> to "mess around with"

Technically, it's called "music spring steel wire" (but most people call
it music wire or piano wire). It is used to MAKE piano strings and
guitar strings (a wound string would be made by winding one size of
music wire around a core -- usually also made of music wire). Also a
very popular material for making springs.

The local industrial supply store sells it in one pound rolls, for about
$20 Canadian. The smaller the diameter, the more you get. My roll of 17
gauge wire (1 mm) is 245 feet long.

One word of caution. There are many, many wire gauges and they nearly
all count backwards; the larger the gauge number, the smaller the wire
diameter. Music wire is the EXCEPTION; size increases with the guage
number. Here are a few sizes to give you an idea:

Gauge Diameter
6/0 .004" (smallest)
1 .010"
5 .014"
10 .024"
15 .035"
20 .045"
25 .059"
30 .080"
35 .106"
40 .138"
45 .180" (largest)

One final thing to be aware of: industrial supplies are usually sold in
rolls, the wire is SPRING wire, and it's curved. This can make it very
difficult to straighten.

Now you know ... probably a lot more than you wanted. Source
"Machinery's Handbook, 24 edition."

Regards,
Bruce



6926 Wed, 20 Oct 1999 00:37:30 -0500 [alt-beam] Re: Someone else's mistake "Richard Caudle" "There are old electricians and there are bold electricians, but there are
no old, bold electricians!"

Richard

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