Electronics Forum | Mon Jan 15 03:42:08 EST 2007 | adamp
Hi all, Last week I have noticed, that solder changed colour in our Soltec wave soldering machine. I am using normal 62Sn37Pb alloy and it's colour changed to violet/darkblue with gold areas. I know that gold colour means that, there is to much Cu i
Electronics Forum | Tue Jan 16 07:22:21 EST 2007 | adamp
We are using composite pallets for our boards. Regards Adam
Electronics Forum | Fri Jan 19 14:34:37 EST 2007 | Al Coholic
Add solder.
Electronics Forum | Mon Jan 15 18:20:11 EST 2007 | greg york
are you using composite pallets in the wave or oil/wax around the pump impellar? cheers greg
Electronics Forum | Mon Jan 22 02:23:47 EST 2007 | adamp
Thx guys, I'll check everything you mentioned, including solder pot, and solder feeder sensors.
Electronics Forum | Mon Jan 15 13:38:29 EST 2007 | realchunks
Check the temp of your pot. It may be getting cooler if you can notice a difference in pump height and density. You may have lost a heater element or two. You can adjust your pot chemestry, but why would you want to if your solder sample came back
Electronics Forum | Tue Jan 16 07:17:20 EST 2007 | adamp
I have checked pot temperature in different parts of solder pot and it looks like it is correct (250C). I have also lowered solder pot temperature and removed copper from the surface of the solder pot (operation repeated couple times). There is still
Electronics Forum | Tue Jan 16 18:13:25 EST 2007 | greg york
Try to process the composite pallet through the wave without any flux and view volume of smoke and if any residue is deposited in the wave when it exits. My guess is that the pallets are releasing some binders that are high boiling and this in turn c
Electronics Forum | Fri Jan 19 11:34:13 EST 2007 | realchunks
I thought the same thing but he did mention density. I threw out the color thing immediately - which is normal. But to NOTICE a density proble with set programs seem aby-normal. Unless one our maintenance guys got a hold of your machine for a PM.
Electronics Forum | Fri Jan 19 13:42:11 EST 2007 | russ
Even the level of solder in the pot can have effect on your wave height. backflow gate may have been tweaked a bit, that affects wave height, many many things affect the proper RPM required for the correct wave height. Pot may be a little lower tha
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