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#1
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"greasy" PCB's
I solder (wave) reguraly some PCB's.
After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Alexander |
#2
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In article , Alexander wrote:
I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Have you tried a dishwasher ? most electronic parts store safely at 100C and are in waterproof encapsulations.... Bye. Jasen |
#3
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"Jasen Betts" schreef in bericht ... In article , Alexander wrote: I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Have you tried a dishwasher ? most electronic parts store safely at 100C and are in waterproof encapsulations.... Bye. Jasen Nice suggestion, but not all PCB's can be done in a dishwasher. Even if I use less agressive tabs. I have succesfull used a "proffessional" ultrasonic cleaner, but it also uses water and not all parts like water. The grease is only on the solderside so I can use cleaners on that site. |
#4
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? Denatured Alcohol ? Flux Remover Sprays ? Etc.
"Alexander" wrote in message ... "Jasen Betts" schreef in bericht ... In article , Alexander wrote: I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Have you tried a dishwasher ? most electronic parts store safely at 100C and are in waterproof encapsulations.... Bye. Jasen Nice suggestion, but not all PCB's can be done in a dishwasher. Even if I use less agressive tabs. I have succesfull used a "proffessional" ultrasonic cleaner, but it also uses water and not all parts like water. The grease is only on the solderside so I can use cleaners on that site. |
#5
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"Art" schreef in bericht ... ? Denatured Alcohol ? Flux Remover Sprays ? Etc. "Alexander" wrote in message ... "Jasen Betts" schreef in bericht ... In article , Alexander wrote: I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Have you tried a dishwasher ? most electronic parts store safely at 100C and are in waterproof encapsulations.... Bye. Jasen Nice suggestion, but not all PCB's can be done in a dishwasher. Even if I use less agressive tabs. I have succesfull used a "proffessional" ultrasonic cleaner, but it also uses water and not all parts like water. The grease is only on the solderside so I can use cleaners on that site. Tried them all of them need wiping with cloth, or leave stripes. |
#6
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"greasy" PCB's
Years ago I got a can from dick smith that came with a tube like a pen tube
with the ink in it, when i sprayed it on the PCB it disolved the greas and was heard of no more but the problem with it was that if I sprayed some types of components they would slightly melt because of the agent and the cold pressure great stuff though try and ask someone at dick smith. sorry I dont remember the name "Alexander" wrote in message ... I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Alexander |
#7
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"greasy" PCB's
There are a couple of things that I am wondering about:
1. How is the "grease getting on the boards in the first place. 2. What kind of "grease" is it. I had set up a soldering machine some years ago that used peanut oil as a means of protecting the solder in the reservoir from oxidization. The oil usually didn't touch the boards, but if it had isopropyl alcohol would have cleaned it off. Albert "Art" wrote in message ... ? Denatured Alcohol ? Flux Remover Sprays ? Etc. "Alexander" wrote in message ... "Jasen Betts" schreef in bericht ... In article , Alexander wrote: I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Have you tried a dishwasher ? most electronic parts store safely at 100C and are in waterproof encapsulations.... Bye. Jasen Nice suggestion, but not all PCB's can be done in a dishwasher. Even if I use less agressive tabs. I have succesfull used a "proffessional" ultrasonic cleaner, but it also uses water and not all parts like water. The grease is only on the solderside so I can use cleaners on that site. |
#8
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"greasy" PCB's
Albert,
You were right about the soldering machine. I (normally don't use it myself) cleaned the whole machine in the vacation of out soldering man. And the problem was gone (for a while). When it returned I got very angry, we now have antoher person at the machine. To prefent the solder from oxidating we use nitrogen, which is won out of air. We use it both in wave soldering and reflow and the results of this are very good. And yes isopropyl alcohol is our primary mean of cleaning PCB's. Alexander "ALBERT C. GOOD JR." schreef in bericht ... There are a couple of things that I am wondering about: 1. How is the "grease getting on the boards in the first place. 2. What kind of "grease" is it. I had set up a soldering machine some years ago that used peanut oil as a means of protecting the solder in the reservoir from oxidization. The oil usually didn't touch the boards, but if it had isopropyl alcohol would have cleaned it off. Albert "Art" wrote in message ... ? Denatured Alcohol ? Flux Remover Sprays ? Etc. "Alexander" wrote in message ... "Jasen Betts" schreef in bericht ... In article , Alexander wrote: I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. Have you tried a dishwasher ? most electronic parts store safely at 100C and are in waterproof encapsulations.... Bye. Jasen Nice suggestion, but not all PCB's can be done in a dishwasher. Even if I use less agressive tabs. I have succesfull used a "proffessional" ultrasonic cleaner, but it also uses water and not all parts like water. The grease is only on the solderside so I can use cleaners on that site. |
#9
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"greasy" PCB's
Alexander wrote:
I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. I gather you want a cleaning fluid, yet say youve tried everything: either they arent both true, or else youre out of luck. Re drying cleaners, I guess you could make your own with clay and solvent. The solvent mobilises the grease, the clay soaks it up, the solvent dries out, and the clay falls or brushes off. Clay: use heavyweight cat litter, crushed. Chalk might also work. Solvent: whatevers working with your particular grease. It might help if you told us what this grease was like, and where specifically it was deposited. Re the dishwashing option, in principle its possible to leave out the water sensitive parts such as relays, covering their pads by hand, wave solder, clean, then solder the remaining parts in by hand. I did this years ago, though I can understand wanting a faster method. I would first look for the source of the grease. Is it heatsink compound? Goo from the ends of reeled component wires? How its distributed on the PCB would give some clues. NT |
#10
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"greasy" PCB's
I agree about finding out what the grease is.
Without knowing and from what you have told me, some one maybe taking liberties with the process, possibly using a flux such as No-Corrode. That is a stearite / stearate and not necessarily soluble in solvents such as alcohol. Also it is not considered appropriate for fine electronic work since it is somewhat corrosive. In that case the work may come back to haunt you down the line. If you wish to discus this further please feel free to contact me via email to arrange for a phone call. Albert wrote in message ups.com... Alexander wrote: I solder (wave) reguraly some PCB's. After soldering the PCB's are "greasy". I have tried brushing this off with a clean ESD-safe brush. but all this did was putting the grease on another spot off the PCB and leave some brushstripes. The same with all PCB-cleaners I have tried, some work well if you clean the PCB afterwards with some cloth. Unfortunatly not all produceb PCB's can be cleaned with cloth. Does anyone have a solution for this problem. I thought of a cleaner which cleans the PCB and dries up in powder. But I haven't found one. I gather you want a cleaning fluid, yet say youve tried everything: either they arent both true, or else youre out of luck. Re drying cleaners, I guess you could make your own with clay and solvent. The solvent mobilises the grease, the clay soaks it up, the solvent dries out, and the clay falls or brushes off. Clay: use heavyweight cat litter, crushed. Chalk might also work. Solvent: whatevers working with your particular grease. It might help if you told us what this grease was like, and where specifically it was deposited. Re the dishwashing option, in principle its possible to leave out the water sensitive parts such as relays, covering their pads by hand, wave solder, clean, then solder the remaining parts in by hand. I did this years ago, though I can understand wanting a faster method. I would first look for the source of the grease. Is it heatsink compound? Goo from the ends of reeled component wires? How its distributed on the PCB would give some clues. NT |
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