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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,

     

    A little more information would be useful- e.g. did you use lead free solder, rosin core solder or paste, iron temperature, flux, etc.  what concerns you most about the results?   Did you have bridging?

     

    it looks like some of the pads did not get enough solder, some too much.  The best way to solve this problem is with a stencil and paste.  But with practice manual paste application improves or try small diameter (less than 0.5 mm) rosin core solder.

     

    Some of the joints look more like blobs than concave joints.  This may be due to temperature as well as excess solder.  Make sure joints are heated long enough to flow and wick away excess solder if necessary.

     

    Soldering SMD manually improves with practice so don’t be discouraged. If the result is functional it is better than some of my attempts.  There are some good videos online but you will notice they all seem to differ somewhat. Try different methods until you find the one that suits you.  Find a video or tutorial that demonstrates good and bad results and you will soon learn to recognize them.

     

    There are good tips in this recent thread: https://www.element14.com/community/message/274031/l/re-first-attempt-at-smd-soldering#274031

     

    Finally, you can always use an inexpensive toaster oven which is now my preferred method: IOT Reflow Oven with Arduino MKR WiFi 1010   The IOT aspect is optional.

     

    Frank

  • in reply to fmilburn

    Hi Frank,

     

    That's very cool that the toaster is becoming a regular tool for you. I'm tempted to try something like this too, I'm going to keep an eye out in case I spot a small toaster here..

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