Re: gEDA-user: home made hot plate

["Mike Hansen" <mehansen10@xxxxxxxxxxx>]

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@xxxxxxxx>
> Reply-To: n6nz@xxxxxxxx, gEDA user mailing list <geda-user@xxxxxxxxxxxxxx>
> To: gEDA user mailing list <geda-user@xxxxxxxxxxxxxx>
> 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@xxxxxxxxxxxxx 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@xxxxxxxxxxxxxx
> >  > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> >  >
>
>
> _______________________________________________
> geda-user mailing list
> geda-user@xxxxxxxxxxxxxx
> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user

_________________________________________________________________
Play Flexicon: the crossword game that feeds your brain. PLAY now for FREE.  
 http://zone.msn.com/en/flexicon/default.htm?icid=flexicon_hmtagline



_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user