Mauricio Jancic wrote:

> 	Anyway, the problem I have, is that this guy is telling me that it's
> better for him to have the component distribution of the board in a way such
> that the PTH components are in the opposite side of the SMD components, so
> he can place all the components and pass the board only one time trough the
> wave soldered.

> 	I find that correct I think, he can assembly the board if it is
> arranged some other way, but I find that its not quite right and I'd prefer
> to have all my components on the same side, specially on some boards.

> 	What is the normal procedure for assembling boards? Do you guy just
> put the components where you need them or you try to think how to simplify
> assembly to lower the costs? (the components where you need them, but off
> course always with no constraint violations).

In terms of the cost of manufacturing you certainly want to have as 
few passes through the equipment as possible. Even on a boart with PTH 
and SMT components I always tried to keep all the parts on the same 
side of the board.

The assembler where I used to work would use high temperature solder 
paste and would place the SMT parts first and run the board through 
the reflow oven. The the PTH parts would be either hand placed or done 
with an axial insertion machine and then run through the wave solder 
system.

Tim
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