Re: DIY SMT Solder Oven

On Wed, 10 Dec 2008 19:14:31 GMT, James Arthur
<bogusabdsqy@xxxxxxxxxxx> wrote:

osr@xxxxxxxxxx wrote:
Put the TC on the metal of the heating element, if its on the PCB, you
are experiencing overshoot because of the PCBs low thermal
conductivity, perhaps?

Steve Roberts

This guy recommends aluminum heat shields to spread the
heat, avoiding hot spots and scorching:

http://ezinearticles.com/?Tools-and-Items-Needed-For-Soldering-Using-a-Toaster-Oven&id=921003

"You will need to make the following modification to your toaster oven
so that your boards don't get toasted by direct infra red radiation from
the heating elements.

The objective is for the heater elements to simply heat the air inside
the oven, so a direct line of infra red heat straight from the elements
to the circuit board must be avoided.

The way to achieve this is to get some thin *** aluminium and make a
cut-out shape that just covers up the elements. You can use a disposable
baking tray from the supermarket to make this aluminium shield."


Cheers,
James Arthur

Hello, 12 inches by 12 inches is rather bigger than any toaster oven
that i know of. This guy has custom built his own. Adjust your
advice accordingly.

That said, i do not get why the small overshoot from 245 C for RoHS
solder to 250 C is damaging normal FR4. RTOP.

.

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