Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


wash

Views: 1870

mike

#39578

wash | 8 February, 2006

i'm looking for a small pcb wash for populated pcbs. If anybody has any info on one please email me @ mbridges@dfe.com I'm located in New Hampshire

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#39580

wash | 8 February, 2006

Not to be funny, but can't you use a dishwasher ? They are cheap.

The only worry there may be water spots, but if you blow your boards dry with an air hose I think they will be OK.

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#39582

wash | 8 February, 2006

The secondary (primary to some) concerns are what you put into the waste stream and how you treat it, and what the chemistry of your residues does to the seals on your machine.

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#39597

wash | 9 February, 2006

Search the fine SMTnet Archives on batch clean*

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#39598

wash | 9 February, 2006

I worked at one place where they had a dishwasher. They had stopped using it by the time I got there. But if they had kept using it I would have gotten a clean glass and put it in to see how clean it came out. I think after a while with only one tank, it would get contaminated with flux residue. I may be wrong, it might flush enough water through to keep all residue out. I still would have liked to have checked even if such a test would not be completely valid test. But it would have been easier to get a glass than any kind of SIR tester.

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#39600

wash | 9 February, 2006

Se�or Tech

If you want clean board using a dish waher, you must run deionized water. If you run DI water through a dishwasher, it will cut through those flimsy pipes like fire driven by Sana Anna Winds through dry brush.

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#39602

wash | 10 February, 2006

Dave, Are you talking about electrolysis ? I thought D.I. water prevented this reaction ?

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#39608

wash | 10 February, 2006

Water is known as the universal solvent for a reason. Not because it's a powerfull solvent but because it has hydrogen bonding and is bi-polar. I think it's the polar nature of H20 that makes it disolve ions. D.I. water will pick up ions where it can, including metal pipes. Pure D.I. water does not conduct electricity but we know water conducts electricity because water is almost never pure D.I.

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#39646

wash | 13 February, 2006

Se�or Tech

Put a penny in your water wash tank that uses DI water. It will disappear in a couple of weeks.

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#39656

wash | 13 February, 2006

Look for the following machines:

Aqueous Technologies ECD EMC Austin American

The above mfrs. make "industrial" grade dishwashers for assembled PCB de-fluxing. Search any of those names followed by "..... batch cleaner", and your search engine will give you lots of places to look. And yes, DI water is highly corrosive.

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Reflow Ovens thermal process improvement

soldering station