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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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The Future of US Kids Making Stuff...
Bill McKee wrote: For removing surface mount or high density flat packs this is the best stuff. http://www.chipquikinc.com/ Not for production work. A good hot air rework station did the job faster and better. I removed a lot of SMD ICs with solder wick. Clean most of the solder off the pins, and use a very small tipped dental pick to see which leads were loose. Then touch the ones that were, with a hot soldering iron and lift them before the solder cools. I could pull a 288 pin IC in about a minute, clean up the pads in about 30 seconds, and solder a new chip in by hand in, in about 90 seconds without any solder bridges. It took longer to clean the board than to change a chip. -- Greed is the root of all eBay. |
#2
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The Future of US Kids Making Stuff...
On Jan 22, 2:02*am, "Michael A. Terrell"
wrote: ... * *I removed a lot of SMD ICs with solder wick. Clean most of the solder off the pins, and use a very small tipped dental pick to see which leads were loose. Then touch the ones that were, with a hot soldering iron and lift them before the solder cools. I could pull a 288 pin IC in about a minute, clean up the pads in about 30 seconds, and solder a new chip in by hand in, in about 90 seconds without any solder bridges. It took longer to clean the board than to change a chip. Have you tried to teach that technique to others? jsw |
#3
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The Future of US Kids Making Stuff...
Jim Wilkins wrote: On Jan 22, 2:02 am, "Michael A. Terrell" wrote: ... I removed a lot of SMD ICs with solder wick. Clean most of the solder off the pins, and use a very small tipped dental pick to see which leads were loose. Then touch the ones that were, with a hot soldering iron and lift them before the solder cools. I could pull a 288 pin IC in about a minute, clean up the pads in about 30 seconds, and solder a new chip in by hand in, in about 90 seconds without any solder bridges. It took longer to clean the board than to change a chip. Have you tried to teach that technique to others? Yes, but they all wanted a hot air rework station and wouldn't pay attention. Now, I don't know if I can even hold on to the tools long enough, and I am out of practice. I did my last one on Sept. 7, 2001, the day I was laid off at Microdyne for their Ocala plant closure. -- Greed is the root of all eBay. |
#4
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The Future of US Kids Making Stuff...
"Michael A. Terrell" wrote in message ... Bill McKee wrote: For removing surface mount or high density flat packs this is the best stuff. http://www.chipquikinc.com/ Not for production work. A good hot air rework station did the job faster and better. I removed a lot of SMD ICs with solder wick. Clean most of the solder off the pins, and use a very small tipped dental pick to see which leads were loose. Then touch the ones that were, with a hot soldering iron and lift them before the solder cools. I could pull a 288 pin IC in about a minute, clean up the pads in about 30 seconds, and solder a new chip in by hand in, in about 90 seconds without any solder bridges. It took longer to clean the board than to change a chip. -- Greed is the root of all eBay. But there is a large difference between production work and having to change one IC in a lab or off site. |
#5
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The Future of US Kids Making Stuff...
Bill McKee wrote: "Michael A. Terrell" wrote in message ... Bill McKee wrote: For removing surface mount or high density flat packs this is the best stuff. http://www.chipquikinc.com/ Not for production work. A good hot air rework station did the job faster and better. I removed a lot of SMD ICs with solder wick. Clean most of the solder off the pins, and use a very small tipped dental pick to see which leads were loose. Then touch the ones that were, with a hot soldering iron and lift them before the solder cools. I could pull a 288 pin IC in about a minute, clean up the pads in about 30 seconds, and solder a new chip in by hand in, in about 90 seconds without any solder bridges. It took longer to clean the board than to change a chip. But there is a large difference between production work and having to change one IC in a lab or off site. Obviously. Then again, soldering isn't the only difference. I built a radio at eight, and soon after my 13th birthday I was working part time in a TV shop repairing record players and car radios. There are people who should never be allowed to touch a tool, yet they are. Some moron will use a cheap chinese iron with an ungrounded tip on a piece of delicate & expensive equipment, thinking they are a genius. Then a $20,000 piece of equipment needs $2,000 to $3,000 in repairs, plus case parts where they don't pack it properly to ship it back to the factory. Or someone borrows $15,000 worth of equipment, then dumps it in the ocean from a balloon then doesn't want to pay for the totaled equipment. The rework station was about 100 feet from my bench, but I changed the IC's myself to avoid waiting hours to days to finish a job. Some people can solder, and others can't. My productivity was more than twice the average anyone else in the plant because of this. Rework tried to have my soldering irons taken away, but both M.E. and Q.A. liked my work. -- Greed is the root of all eBay. |
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