Hi Ed,
    Small parts cleaning has been a challenge for most of us.  I'll offer a couple of ideas that
has worked for me in the past

1) Wash the parts in a 75/25 alcohol/water mix.  Use a plastic strainer and pail.  Afterwards,
place on a large mesh screen (metal) and place in an oven at 180 deg. F.  this method is
extremely labor intensive.  Do not put in an oven that is over 212 deg. F or used for general
baking due to the potential of oxidation.

2) generate a "frame" using nylon type screen mesh (large mesh) and .059" laminate.  Sandwich the
boards between the frame, secure, and process through your cleaning unit.  Check the pieces at
the exit conveyor for possible overlapping.  If overlapped, place in the oven as in #1)

3) THIS IS MY PREFERRED METHOD:    Try to get your customer(s) to palletize by "web" routing or
scoring and ship in a pallet form.
    Good Luck... JOHN WAITE

Eltek Ltd. - Process Engineering wrote:

> Technetters,
> After routing stage the PCBs are washed to remove dust , fingerprints etc .
> Normally , this is done using washing machine fitted with hot water rinse ,
> soft brushes , high pressure rinse , DI rinse and dryer . As long as the PCB
> is bigger than , say , 7" by 4" , we have no problems . Probles are with
> really small boards such as 2" by 3" or even less .
> What kind of washing machines are used for such small boards ?
> Edward Szpruch
> Eltek Ltd - Israel
> Tel  972 3 9395050
> Fax 972 3 9309581
> E-mail :  [log in to unmask]
>
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