Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Markus Zingg <homebrew-pcb@...> 
wrote:
>
> If I have components on both sides, I just do the simpler side 
first, 
> reflow it, then do the other side. No part ever felt off so far. 
I've 
> not yet been brave enough to populate both sides and do it in one 
> shot.... :-) Nice to hear that this would be an option also. I 
prefer 
> the two step aproach cause you then don't have to be THAT carefull 
with 
> not disturbing the already populated but not yet reflowed side.
> 
> Markus
> 
> eeks123 schrieb:
> >
> >
> > > Tacky enough that I have populated boards on both sides at the 
same

I definitely think Markus's method of reflowing twice, as opposed to 
using glue dots etc. is a much better method to use unless the 
components on the bottom of your board are large (maybe bigger than a 
SOT23). I would expect that even the bigger components might not fall 
off.

As I mentioned before, if you use glue dots you have to make sure 
your component is perfectly lined up. It is not a very forgiving 
method when doing it by hand. It's always nice to have the "gift of 
surface tension" to pull the component into alignment during refolow.

It's important to be a doer and try it out. If a component falls off 
the bottom during the second reflow, then maybe think about using a 
tiny glue dot, just for the component(s) that fell off.

Anthony Burch http://www.SuperSolderingSecrets.com