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Reflow for the first time

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#77084

Reflow for the first time | 10 February, 2017

Today I tried to reflow a PCB for the first time. It did not went well. Can anybody tell me what did I do wrong?

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#77085

Reflow for the first time | 10 February, 2017

I think your problem is that you are using low temperature solder paste with a high temperature solder paste profile. You might want to attach some thermocouples to verify.

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#77087

Reflow for the first time | 10 February, 2017

Perhaps I can add some nitrogen?

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#77094

Reflow for the first time | 13 February, 2017

It looks like you got all the paste to a liquidus stage and ten probably to a gas stage, so it is just a matter of running the mole several times.

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#77095

Reflow for the first time | 13 February, 2017

Den, Just a hunch- I think you might be ramping too fast.

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#77100

Reflow for the first time | 14 February, 2017

That's one way of testing for UL94!

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#77102

Reflow for the first time | 14 February, 2017

Pre-heat, pre-heat, pre-heat! Swap out your acetylene with some propane. Problem solved. Throw a potato in your solder pot while your at it...

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#77108

Reflow for the first time | 15 February, 2017

I tried several times - it squeaked for a while and then silence...

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#77114

Reflow for the first time | 16 February, 2017

Get yourself a KIK Oven and Wave Profiler. It will get you in the Ballpark before burning down the joint. Easy to use and talk to your paste supplier.

Murray

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#77115

Reflow for the first time | 16 February, 2017

Sorry that is spelled KIC not KIK

Murray

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#77145

Reflow for the first time | 23 February, 2017

Deni,

I would suggest to install bottom heater. The rest is absolutely OK. Is your plant ready to accept orders for space shuttles PCBAs and medical ones? I would place a couple of POs.

Regards, Pavel

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Rob

#77149

Reflow for the first time | 24 February, 2017

Deni,

I would suggest N2O over straight Nitrogen, as you will immediately find your results more satisfying, and any defects will become less of an immediate concern.

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#77240

Reflow for the first time | 14 March, 2017

In modern electronics, Reflow soldering is a very effective method for soldering printed circuit boards with lots of surface mount components. In some reflow ovens, the PCBs are snapped in a frame that touches the PCB only on the edges.

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#77264

Reflow for the first time | 15 March, 2017

Your fixture is pulling too much heat from the assembly. I'd push the TAL to closer to 90.

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#77494

Reflow for the first time | 28 April, 2017

You might want to attempt doing this in a clean room.

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reflow oven profiler

Reflow Oven