Electronics Forum | Mon Aug 29 21:36:39 EDT 2011 | davef
We agree with JAX. Changing the pads on your board as you describe won't do shit. Possible solutions to a cold solder connection problem include: * Raise the peak temperature to be high enough to reflow the material thoroughly. * Select a solder pas
Electronics Forum | Wed Sep 07 16:44:51 EDT 2011 | SheanDalton
Shenmao also offers liquid fluxes that are "Made in the USA", formulated and shipped from their factory in San Jose, CA. Shenmao's engineers do travel to support process, and, we (as their distributors) work hard to support users too. This link t
Electronics Forum | Tue Sep 13 12:00:57 EDT 2011 | swag
Flex circuits are assemblies that can be bent or twisted into shapes after assembly (flexible). When heald in panels for SMT assembly, it's difficult to get repeated x/y offsets so you need to consider fiducal placement in your design for placment m
Electronics Forum | Mon Sep 12 10:41:50 EDT 2011 | processmxli
Hi All We have run SMT process with SnPb but we’re installing some lead free components like capacitors and resistor lead free. After the reflow oven all components have good appearance with solder join sheen. But the lead free components the solde
Electronics Forum | Mon Sep 19 09:46:32 EDT 2011 | blnorman
Hopefully the coating does contain a UV tracer. We used a silicone years ago that did not, but UV did make it fluoresce to a degree, you just couldn't ensure 100% coverage. One time we did have a problem with the coating getting on connector pins,
Electronics Forum | Wed Sep 21 14:43:50 EDT 2011 | russw
The confusing thing is we are doing the same thing we've been doing for years, same flux levels, same procedures, etc. so you would expect the same results. The only difference is the new bottle of 951, but Kester insists there isn't a problem with
Electronics Forum | Fri Sep 23 09:18:48 EDT 2011 | oswaldorey
Same happenend to me with another flux some years ago, to me its a reduced viscosity of the flux, what I did was to reduce the width of the slot on top, where the flux exits, reduced the distance from stone to pcb and filled the flux reservoir to the
Electronics Forum | Mon Sep 26 16:43:18 EDT 2011 | action_101
I am happy that you work in a shop that can build boards right the first time on a consistent basis. Unfortunately, I would say that every place I have been at, we have had a hard time meeting class III standards day in and day out without some kind
Electronics Forum | Thu Oct 20 19:23:18 EDT 2011 | eadthem
As far as the buttons go, White = pause for inspection when depressed, lit when active Green = pass after inspection when lit you need to press the button, when flashing its waiting for the upline machine, Yellow/orange = when flashing indicates
Electronics Forum | Mon Oct 03 15:13:00 EDT 2011 | tombstonesmt
It sounds to me that it's a heat transfer issue. The solder is only bonding to the lead on not the barrel correct? Does your selective solder equipment have any type of heating source? Can you "dwell" on that particular joint? On some of our products
