Buy a dental pick. Knock them back down with one hand while heating the
board with the hot air.
Typically I just throw the 0603 caps/resistors with tweezers and use a
dental pick for drag positioning. I find tweezers stick when mixed with
flux so you need to clean them constantly and the precision to place parts
is much hard than dragging them into position.
Dental pick is the way to go.
Hot air gun is much better for small prototype runs because a hot plate
gets too hot for you to put your hands/face on it with the pick or tweezers.
Henry
On Fri, Mar 16, 2012 at 10:19 AM, Dylan Smith <dyls@...> wrote:
> ∗∗
>
>
> On Fri, Mar 16, 2012 at 04:53:16PM -0000, acidblue wrote:
>
> > Wouldn't the air move the smaller parts?
>
> It doesn't move 0603 parts at least. The solder paste will keep them
> stuck in place.
>
> One thing you do have to watch out for with small parts is "tombstoning".
> The surface tension that keeps them from blowing away is not your
> friend if you used too much solder paste (which is really easy to do).
> What happens is your 0603 cap levitates itself vertical like a tombstone
> (hence the name) if there's a bit too much solder paste on the terminals.
> It's easy enough to correct (lay it back down again with tweezers while
> you keep the solder molten, you only need three hands to do it) but
> it will slow you down. (You need very very little solder paste, however
> much you put down you'll find half the time it's still too much).
>
>
>
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