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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Wavesoldering Preheat

ADAM

#26943

Wavesoldering Preheat | 21 January, 2004

What is the most effecient form of heating ,ie calrod, IR, convection , or a mixture ? to produce a good thermal profile on a wavesoldering system on thermally challenging multi-layered boards?

Thanks

Adam

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#26947

Wavesoldering Preheat | 21 January, 2004

Forced Convection delivers the most efficient thermal transfer.

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Claude

#26948

Wavesoldering Preheat | 21 January, 2004

What is the most effecient form of heating ,ie calrod, IR, convection , or a mixture ? to produce a good thermal profile on a wavesoldering system on thermally challenging multi-layered boards?

Thanks, Adam

Adam, I agree with Pete C. Forced convection is the best and I've had experience with each type you mentioned. When soldering high mass assemblies, you may need to have both top and bottom side pre-heaters in your machine. This depends on the thermal characteristics of the assembly you are soldering. In the past, I've had to "thermally soak" high mass assemblies in stand alone ovens placed next to the wave machine in order to make up for the lack of pre-heat in the machine. Hope this helps, Claude cwilson(remove_this)@reptron.com

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Erv

#26966

Wavesoldering Preheat | 23 January, 2004

We have very good results with a mixture. Lower 1st and 2nd preheat is convection, 3rd lower is calrod. No upper 1st and 2nd, 3rd upper is IR. With this combination I have found no challenge that could not be turned into a good profile.

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Rob O

#27003

Wavesoldering Preheat | 27 January, 2004

I agree with Erv. That is the same combination we use and it has served us well.

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