Daan,

Two suggestions:-

More zones will give more control over the profile (although different
peoples prejudices about profile shape may suit different numbers of
zones better!).

As well as the increased throughput (assuming the overall length and
therefore belt speed is increased) there is another possible advantage
in that a board will spend less time with one end in one zone and one
end in the other. This can reduce the temperature gradient (front to
back) in the board which, if the board has a high in plane conductivity
can also reduce the overall difference in temperature profile between
the front and back of the board.

David Whalley

>Does anyone know a good reason, besides the possibility of having a
>higher throughput-rate, to invest in a 7-heating-zone reflow oven (with
>forced convection) instead of a similar machine with only 5
>heating-zones ?
>
>Daan Terstegge

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