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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Reflow for the first time

Views: 2913

#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?

Attachments:

reply »

#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.

reply »

#77087

Reflow for the first time | 10 February, 2017

Perhaps I can add some nitrogen?

reply »

#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.

reply »

#77095

Reflow for the first time | 13 February, 2017

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

reply »

#77100

Reflow for the first time | 14 February, 2017

That's one way of testing for UL94!

reply »

#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...

reply »

#77108

Reflow for the first time | 15 February, 2017

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

reply »

#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

reply »

#77115

Reflow for the first time | 16 February, 2017

Sorry that is spelled KIC not KIK

Murray

reply »

Reflow Oven

reflow oven profiler