Electronics Forum | Wed Feb 16 17:38:54 EST 2011 | ppcbs
Is there a simple test available to test for lead content of solder. I don't need to know the specific amount. I just need to know if there is any lead present at all.
Electronics Forum | Fri Mar 25 08:54:59 EDT 2011 | mosborne1
Have you checked your reflow profile? You need top make sure that you are with the specification of the solder paste. We currntly use the Kic thermal profiling device.
Electronics Forum | Thu Apr 28 08:12:48 EDT 2011 | mosborne1
You should only need to mix in thinner if your formulation changes. You will need to check the specific gravity of your flux. You can do this by using a hydrometer. Contact your flux supplier for their advice.
Electronics Forum | Mon May 16 09:54:06 EDT 2011 | vickt
This could be the cause. A simple test is as follows: Turn on the clutch for the specific spindle in I/O and use your hand to rotate the z shaft to drive down the spindle. Drive the spindle by hand to the end of travel and try rotating beyond that
Electronics Forum | Wed Jun 22 11:38:21 EDT 2011 | SBecmpe
I have purchased step up and down stencils for specific situations. What do you mean by "Patchwork"? Is this a rework process?
Electronics Forum | Mon Jun 27 03:32:52 EDT 2011 | samsim
It will not easy to measure solderability on PCB pad. Any metal tends to oxidize with time and temperature. Make sure your storage of the PCB is accordance to supplier recommended specification.
Electronics Forum | Tue Aug 09 14:38:24 EDT 2011 | ram324
Does any body has a electronic manual for DEK screen printers? specifically for horizon and/or infinity that may be willing to share?
Electronics Forum | Tue Aug 23 06:59:26 EDT 2011 | headlad
We use a 2 part epoxy from DEVCON it's listed as 5 minute FR 2 part epoxy. We have used a lot of the material with excellent results, specifically for security reasons.
Electronics Forum | Thu Sep 15 07:03:38 EDT 2011 | mosborne1
This looks like a flux problem to me. I would check the specific gravity of the flux. Also check the thermal profile of th e wave solder process.
Electronics Forum | Wed Sep 14 09:19:30 EDT 2011 | swag
Target those specific parts/leads with a thermal-couple and a mole and try to get the peak reflow temps up to 225 C. It's not a cure but it will improve the apperance of the solder joints.
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