Homebrew_PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:

>
> On Mon, 15 May 2006 09:30:56 +0200, Lez <lez.briddon@...> wrote:
>
> >
> >>
> >> But I wasn't pleased with how it looked. There was too much

solder

> >> blobbed up on most of the board (some parts were OK...just at

the

> >> edges...where I had probably accidently laid down less.) So I

tried

> >> Stefan's suggested method for removing the excess. With a paper
> >> towel. Except, it didn't really want to come off. I used a

slightly

> >> damp paper towel, btw. I shot the board again with the hot air

gun -

> >> just before applying the towel. I suspect the wet towel might

have

> >> cooled the board, I mean the solder, off too quickly, so it

froze in

> >> place, instead of wiping aside.
>
>
> You heated too much. The strange thin layer happens before the

paste

> reflows.
> I don't know how this works though.
>
> ST
>

That makes sense.

I should have read your instructions more carefully.

Thanks.

Jim

P.S. For now, I will have to come up with some sort of hard squeegee
and scrap away the excess solder (now minus any flux). I hope I
don't pull up a trace. I will try my technique out on one of the
ample ground planes I have in place....before I try it on the traces
and pads.