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which are the best smd welding techniques?

kcmando1

Good morning everyone, this is my first discussion, so be kind with me image

 

I'm starting to weld smd for a PCB in a formula student aplication, and the first approach was this:

image

 

This was welded with a basic JBC soldering station and smd tweezers, and with some patience and time the result was functional, but not professional.

 

What are your tips?

 

Thanks for your time.

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  • Hi Marti,

     

    You've got great tips from everyone, especially the point that the preferred method may vary from person to person depending on tools/materials and what they are comfortable with.

    I like holding the solder and tweezer in one hand, others like putting solder on a pad first, or using flux paste, and so on.

    The photo isn't detailed enough, but if it functions as you say, you're 90% there. All prototype boards look untidy to a degree with manual methods, you can optionally scrub it clean with a brush and cleaner or IPA for a one-off project. The resistors at the top look like the flux wasn't sufficient, or the iron temp was too low or the iron was reapplied many times. The blobs where there is too much solder, are sometimes inevitable, because wire solder is nearly always too thick. It doesn't affect function if you're not getting shorts.

  • in reply to shabaz

    Agreed with Shabaz.

    Use proper soldering temperature and flux is essential for smd soldering. Another thing that I want to mention here is soldering iron power.

    Low power soldering iron cannot properly solder any pad connected to a thermal plane.

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