- Jun 25, 2022
this are midgrade pins I love the pins you can get 4-5 grams of 24 k gold from 1kg of this pins but you must cut the unplated partI recently purchased 125 Siemens industrial PLC boards, the kind they use to run automation equipment. The boards that had Cpus on them had 386 and 486 processors so they have been around for a while.
All of the boards had at least 2 and some had 3 or 4 IDE type connectors on the boards (see photo 1). On normal type boards I would use a steel putty knife and and cut the connectors off of the board which would leave a clean pin I just had to pull from the holder. These boards that does not work on, I have been heating them on a hot plate and pulling the entire connector pins and all off of the board, I would then pull the pins ( photo 2) and then clip the pin off where the plating stops (photo 3).
As you can imagine it takes some time to do all of that and my fingers and thumb are wore out and I have several hundred connectors to do yet. My question is if I am going to process these in a sulfuric acid stripping cell to I really need to clip them off at the plating or can I just put the entire pin in and strip it that way ( photo 4) ?
Would the solder on the ends of the pins cause problems? This is new to me and I do not want to make my first attempt harder that it has to be. Any info would be appreciated....
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