Electronics Forum | Thu Nov 08 10:05:04 EST 2007 | pjc
I have not seen hold size as an issue when switching Sn/Pb to Pb Free wave soldering. Trying increasing your dwell time in the wave- typical for Sn/Pb is 2 to 3 seconds. Try 5 seconds to see what you get.
Electronics Forum | Thu Nov 08 13:15:30 EST 2007 | russ
60% ratio would be great start. that is what we typically shoot for with all leaded for the most part. 25 mil diameter in a 40 mil hole, works great for auto insertion as well Russ
Electronics Forum | Thu Nov 08 22:27:52 EST 2007 | jkhiew
Did the PTH barrel ends in massive copper clad ? If yes this type of poor thermal layout topside heating is often recommended.
Electronics Forum | Fri Nov 09 15:21:34 EST 2007 | jdumont
Are you thinking for the soon to be displaced air to be able to escape out the top? Raising components wouldn't be ideal from a process standpoint.
Electronics Forum | Sat Nov 10 07:33:51 EST 2007 | davef
Josh: 2222 will meet your requirements. 2221 is a companion to 2222. So, if you're going to try to get your engineers to follow an accepted standard, you might need both. Although, they probably already have both and are just playing dumb with you.
Electronics Forum | Wed Nov 07 13:56:04 EST 2007 | jrr3434
I need a stainless steel pot caoted for lead free. Can anybody tell me what compines in the U.S. do this? Thanks.
Electronics Forum | Wed Nov 07 22:59:53 EST 2007 | davef
All the pumps, chimneys, innards, and what-not need to be coated in addition to the pot, eh? Many equipment suppliers have "trade-in" deals to swap original pot assemblies with remanufacturered lead-free pot assemblies.
Electronics Forum | Thu Nov 08 07:45:03 EST 2007 | hussman
We use the Gel Flex from MPM. Made a different base for each machine. Works well for most boards, but you may need additional pin support for larger boards. No tools, no vaccum hoses, no missprints (which Grid Lock is famous for), and best of all
Electronics Forum | Thu Nov 08 09:24:37 EST 2007 | pjc
Here's another outfit that makes a board support system: http://www.production-solutions.com/ The Gel-Flex may fit in a DEK. The gel blocks and pins in the kit are 4cm high. Not sure what the centernest depth (from conveyor belt to bottom plate) i
Electronics Forum | Thu Nov 08 10:02:55 EST 2007 | hussman
Yes. I used to use em on our old 286. The side clamps work very well with them and our missing parts from support pin problem went away. It was our #1 defect a few years ago. 100%ing work orders for missing parts sucks.
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