Hello again,

Bridges could be as a result of heatsinking.  Is the component large?  Have
you played with the preheat?  I apologize if this is basic but run a plot
of the heat rise and see if perhaps the component temp causes the solder to
freeze when it contacts the lead in question.  If all else fails I could
send you a different flux.

Denis

At 11:13 AM 8/15/97 -0400, you wrote:
>Hello,
>
>This question might sound pretty basic to many of you but here it is:
>
>We have a brand new wave soldering machine but we are having problems
>getting rid of bridges. We tried to increase (or lower) conveyor speed, add
>more flux, lower the wave, but nothing seems to work. Rotating the PCB 180o
>doesn't help either. The bridges are either in the X or Y direction
>(sometimes both) and, in one case, the connector leads have a pitch of about
>0.080".
>
>Any suggestions, basic theory about bridges would be appreciated.
>
>[log in to unmask]
>
>