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Re: gEDA-user: home made hot plate
Why not just get a 1/4" slab of aluminum, throw some thermal expoxy on the
bottom(or thermal paste I suppose) and just drop the plate of aluminum down
on top of the hot plate? You could also embed a thermistor or thermocouple
in the plate to determine temp. This gets you the simplicity of the
hotplate and the uniform thermal distribution you need for a very low cost.
A plate like this can be had at McMaster Carr for <$40, ground to <0.002"
tolerance.
>From: Dave N6NZ <n6nz@arrl.net>
>Reply-To: n6nz@arrl.net, gEDA user mailing list <geda-user@moria.seul.org>
>To: gEDA user mailing list <geda-user@moria.seul.org>
>Subject: Re: gEDA-user: home made hot plate
>Date: Sun, 04 Mar 2007 11:06:28 -0800
>
>Yes, it looks like a good way to go for cheap hot-plate soldering, but they
>also say that uneven heating is an issue. My thought with the power
>resistors is that you could arrange them such that you got more even heat.
>And a prowl of the surplus houses should turn up a hand full of old
>fashioned power resistors in the square ceramic cases that would be easy to
>epoxy to a sheet of metal, and you should be able to build something for
>under $30 with good scrounging. The next time I visit the local surplus
>house I plan to look for some resistors.
>
>In the mean time... I just ordered a factory refurbished convection toaster
>oven off of Amazon for $60... will let you know how that works out :)
>
>-dave
>
>carzrgr8@optonline.net wrote:
>>I think this link has been tossed around before - sorry if it's a repeat.
>>http://www.sparkfun.com/commerce/present.php?p=Reflow%20Skillet
>>
>>These guys did a study of the best reflow gizmo and found it to be $30
>>skillet!
>>
>>gene
>>
>>----- Original Message -----
>>From: Dave N6NZ
>>Date: Friday, March 2, 2007 1:11 pm
>>Subject: gEDA-user: home made hot plate
>>To: gEDA user mailing list
>>
>> > Seeing DJ's hot plate photo brought to mind a link I once saw,
>> > where a
>> > guy built a home-brew SMT hot plate. I can't find the link, but
>> > as I
>> > recall, he used a few low-ohm high-watt power resistors epoxied
>> > to a
>> > piece of aluminum sheet. He drove it with a 0-30V bench supply
>> > and
>> > controlled the temperature manually by varying the voltage.
>> >
>> > Seems to me that one should be able to build a pretty good hot
>> > plate
>> > that way for not a lot of money. Although I would think that
>> > copper
>> > might give more uniform heat spreading than aluminum (at much
>> > greater
>> > expense, however, unless you get lucky). And a thermostatic
>> > temperature
>> > control shouldn't be hard.
>> >
>> > -dave
>> >
>> >
>> > _______________________________________________
>> > geda-user mailing list
>> > geda-user@moria.seul.org
>> > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
>> >
>
>
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