Hi Pix
The solder has not flowed over the whole pad. Just seems to be “sitting on” the pad around the edges, particularly the side facing camera.
For comparison get a glass of water. If the water “wets” the glass the meniscus will be concave. That is the water will be wetting the glass a bit above the actual water level. If the water does not “wet” the glass like it might have some sort of foreign film on it the meniscus will be convex. That is the edge will be a bit below the water level.
Incidentally the meniscus of Mercury (as in thermometer) will always be convex. To do with surface tension.
A nice shiny concave curve from the pin to the pad with the solder covering the pad and only a thin film at the edges. Definitely not just a blob.
Have a close look at the last 4 pins I have soldered into the board. I am having trouble with a slanted pic and lighting. I have ordered a Mag light and I can photo through the magnifier and have a light around it so might have more success. I will try again to morrow and see if can get a suitable pic so you can see what I mean.
If you do a bit of internet surfing you should be able to find some drawings of dos and donts.
Don’t take much notice of American U-Tubes. Go for the printed articles. Have you read the link in my post yet.
An Overview of soldering stations
of 6 days ago. If not you should.
EDIT: I just noticed that you have “liked” that post. Thanks
Cheers Bob
Google https://www.google.com/search?client=safari&rls=en&q=meniscus+of+water+and+mercury&ie=UTF-8&oe=UTF-8
