For special board ,needs customization. If you have any question, just feel free to contact e-mail: bella qy-smt. Qinyi Electronics Co. ACI Technologies, Inc. Machine maintenance Service and support knowledge with customer satisfactory. Deal with customers at all level via phone,remote and mail. Sound knowledge of PCB fabrication machine. Have serviced AMF pinspotters both mechanical and electrical sides; included repair of chassis pc boards to component level.
Leaderway Industrial Co. Natural wood is among the best material that does not gen Beau Tech. Hand Soldering 2. Hot Air Soldering 3. Hot Plate Soldering. Hand Soldering is the most traditional way we solder the SMD components. This is done using a Soldering gun. This might be difficult at the beginning but after a few days of practice you will get used to it. You will need a very fine tip soldering iron preferably one with temperature control to get better precision, a lot of flux and some patience.
Generally you can solder to packages by hand without much of a problem. But if you go smaller than that, then you may need a microscope or a magnifying glass because these are so tiny. This soldering method is bit easier than using a Soldering iron. In this process instead of soldering iron, Hot Air station and Solder paste are used to mount the components.
Here is step by step instructions to perform Hot air soldering. This process is similar to the Hot air soldering but instead of manually heating the components one by one here, a heated bed is used to heat the entire PCB board enabling it to solder all the components at once. You can buy a commercial hot plate station available in the market or make one by yourself using a simple household clothing iron.
This is a very fast and clean method compared to the other two mentioned above. Appropriate tools are always necessary to make a clean soldering. Also it will make our life easier. A tweezer is very essential while soldering Surface Mount Components. Because you just can not grab a SMD resistor or capacitor or any components with your bare hands.
Also it will help you to align the components properly. Besides using tweezers while handling components will eliminate the risk of part damage due to static electricity. Good amount of flux always makes the soldering neat and well finished. In Win3. The low melt is definitely the easiest to do, much harder to lift a pad too,, also easy to clean up. It contained several thousand DC and ramped DC Triangle-wave output power supplies from about watts to well into the the megawatt range-so we fixed a lot of power supplies!
All of the workstations in the mobile home ten in all had CAL rework stations. These were cool because they used induction heating of the tip and were at temp and ready to use in seconds-no matter the size of the tip. And yes, ever since then my kit always included several sizes of solder and wick, a bottle of flux and Chip Quick…. Excellent video. I really need to get myself a preheater. BTW, the drag method with a braid will absolutely kill small lands, such as 0.
You need to cut off little pieces of braid and hold them with tweezers, press down softly on the pad and lift slowly. The only time I have ever seen braid be useful is for doing foil clean up after a part is removed. Other than that braid is so spotty for me I tend to not consider using it today.
Braid is perishable too. There is chemical on the braid that does not always last forever. Powder flux? Something on braid that can kind of not be so good with old stock. Plus there is a lot of technique when it comes to using braid effectively, like clipping it at an angle.
There is a lot of technique with using braid I suppose. For foil clean up I think braid is great though. For sucking solder out to remove components, not so much. Little pieces of braid, huh? Never thought of that, sounds worth a try. Applying some liquid flux directly to the braid helps too.
That braid was a little big but sometimes you use what you have on hand and adapt. Not a peep or did I miss it? Too little temp and you will rip pads off. Heating for too long and you will cook something. Heating too quickly and you will crack something. Heating one side of multilayer pcb and you will warp it. Patience also helps, couldnt watch that braid part, Bill almost cleaned few passives off.
There is no point showing something bad or sloppy. How is anyone supposed to learn anything from that? Difference is they are really fixing something and video is just an addition. Their biggest concern is following correct procedures, not operating video equipment. This is a different format with different goals, in this case a very quick exploration of several techniques as an introduction to their capabilities:in minutes.
Now get lost with it! Use a longer piece of braid, tacky flux, and a blade tip to remove the solder in one smooth wipe. You can get blade tips from 5mm up to 30mm wide.
Get a length of braid, dip it into the tacky flux and then, using the blade on top of the braid, wipe the BGA pads. Love the technique. I have invested in a ZD and it works like a pro. As always, very interesting and informative videos, Bill. You name it they got it.
You can also do mostly the same for through-hole devices by heating the back of the PCB and using tweezers to pull the components out. We he came back the labels on the eproms were actually charred at the corners and the sockets had curled leaving the pins soldered in. He came running up to me to declare I must have fixed the heatgun wrong.
That was a really nice video, nicely made and told. If I was stranded on a desert, and I could only bring three items, Chip Quick would definitely be one of those items. Beware Solder Tweezers! As such, they had a foot-activated switch, and heated by passing a Large Current between the tweezer points.
The use of a large current may have unintended side-effects, depending on whether you are de-soldering resistors, diodes, or capacitors. It is unusual that a vendor has a tutorial showing desoldering and soldering tutorial with a temperature controlled soldering iron for a QFP part these days.
For desoldering, they inserted a wire behind the pins, anchored on one side. As you heat up the pin, you tug on wire and the wire lifts up the pin.
I used a similar technique at one point. I especially love the lighting, lack of clutter on the desk and pace. There is no rush, no shaky hands, sex on a stick. I remember fixing those PCBs and customizing assembly language.
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