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Soldering lead free and leaded tin in the mix in one machine

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jwr

#85981

Soldering lead free and leaded tin in the mix in one machine | 8 December, 2020

Who is using two sorts of tin in one selective soldering machine with to solder pots? So then the soldering program selects the correct pot (tin). What are the risks? Adding wrong tin in the wrong pot. Mixing up the nozzles?

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#85991

Soldering lead free and leaded tin in the mix in one machine | 10 December, 2020

Yep, done it previously with a multipot machine. Using with wirefeed to top up the pots means you only have a contamintion risk when you fit a new top up reel. Used separate nozzles for both, but theoretically using titanium nozzles would mean no cross contamiation - if you have an XRF you could monitor it?

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#86006

Soldering lead free and leaded tin in the mix in one machine | 15 December, 2020

I have done it different ways on different equipment.

1. Remove alloy one from the machine. Add alloy two only. and use it.For next board, do the same. 2. There are machines with separate sections for PB and PC-Free, so pots are away from each other - no contamination. 3. Two separate machines

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SMTA-64387520

#86018

Soldering lead free and leaded tin in the mix in one machine | 17 December, 2020

We use both in our selective soldering machine. Training is the most important concern. As long as you have well trained operators the risk is minimized.

This message was posted via the Electronics Forum @ SMTASMTA

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jwr

#86141

Soldering lead free and leaded tin in the mix in one machine | 20 January, 2021

Thanks for replying... Unfortunately (or not) it isn't relevant anymore. Due to the effects of covid-19 we don't have any active aerospace customers anymore so (for now) we're only making leadfree products.

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