I don't think adjusting the clearance is going to solve her problem,
and that would be an expensive experiment (in time if nothing else)
for no gain. We use silver finish here, so I can't comment on that
except to say there has to be a bazillion boards with her finish
being built successfully, so I suspect the machine itself.
just a guess, though
Jack
On 10/6/06, [log in to unmask] <[log in to unmask]> wrote:
>
> Jack and Hg,
> I almost hate to disagree, but the equipment will likely work better if
> you
> use SMEMA standard fiducials.
> 1mm diameter copper with a minimum of 1mm clearance to anything
> all around.
> No copper, no mask, no nothing within 1mm of the fiducial dot.
> Unfortunately using Sn100 finish does not allow a shiny dot for the
> equipment to find, so you need the minimum clearance to help.
> If you can try a coupon with multiple variations of clearance .5mm, 1mm,
> 1.5mm, round, square, etc.
> I am relatively sure you will find the SMEMA standard of 1mm round with
> 1mm
> round clearance the best, but the finish may have more effect and there
> fore
> need something to help compensate.
> Good luck,
> FNK
>
>
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