Thru Hole - Manual Soldering

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Hello, Currently having some solderability issues with some... - Aug 23, 2024 by Carl_P

Sorry for the dumb question, but are you using a compatable ... - Aug 26, 2024 by MistrThou

If it's ENIG, do you possibly have a "black pad" s... - Aug 26, 2024 by ProcEng1

Flux is spec'd to match the paste & wires in use etc so ... - Aug 27, 2024 by Carl_P

More tin colored or more nickel colored? Maybe the gold is t... - Aug 27, 2024 by Stephen

I agree, the gold is possibly too thin. I have see this many... - Sep 05, 2024 by Morticia's Mummy

Carl_P

#91347

Thru Hole - Manual Soldering | 23 August, 2024

Hello,

Currently having some solderability issues with some thru hole soldering of various components.

Fuse Holders, LED's, Connectors etc etc...

Normally no issues at all.

So far i've tried baking the boards, calibration of soldering irons etc but see no improvement - not really used to having to manually solder parts so am at a bit of a loss at the moment trying to work it out. Only noticebale thing I can see at the moment is compared to normal the Eng finish appears more tin in colour than gold?

Thanks for an help, input in advance

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MistrThou

#91353

Thru Hole - Manual Soldering | 26 August, 2024

Sorry for the dumb question, but are you using a compatable flux?

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ProcEng1

#91354

Thru Hole - Manual Soldering | 26 August, 2024

If it's ENIG, do you possibly have a "black pad" situation with a bad plating cohesion?

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Carl_P

#91368

Thru Hole - Manual Soldering | 27 August, 2024

Flux is spec'd to match the paste & wires in use etc so I don't think we have an issue here.

Bad Pad - what would I be looking for to confirm? I would say the pads look more tin than gold colour compared to normal so i am thinking it is some kind of fault with the supplied boards more than anything else at the moment

Thanks.

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Stephen

#91369

Thru Hole - Manual Soldering | 27 August, 2024

More tin colored or more nickel colored? Maybe the gold is too thin?

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Morticia's Mummy

#91403

Thru Hole - Manual Soldering | 5 September, 2024

I agree, the gold is possibly too thin. I have see this many times over the years. Manufacturers try to get away with the bare minimum to maximise revenue. I have also just come across another old favourite where part of the cleaning process failed at the manufacturers leaving a residue on the board that is entirely invisible but impossible to solder over and it caused non- wetting on the edges of the pads on one edge of the PCB. In either scenario push it back to the supplier.

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