Electronics Forum | Thu Nov 06 07:45:10 EST 2008 | davef
Try here: * http://forum.allaboutcircuits.com/showthread.php?t=15575 * http://www.uoguelph.ca/~antoon/gadgets/555/555.html * http://www.williamson-labs.com/555-tutorial.htm
Electronics Forum | Mon Nov 10 12:29:59 EST 2008 | joeherz
Dave, You've got me worried - All of the boards we've tested to this point are LF HASL. Why do you say "can't be ENIG"? Am I missing something? We have not sectioned soldered boards as yet but plan to shortly. Thanks.
Electronics Forum | Mon Nov 10 19:45:51 EST 2008 | davef
Joe On the earlier ENIG comment: No, you're not missing anything. ENIG board are less likely to have copper dissolution issues that other solderability protection.
Electronics Forum | Mon Nov 10 22:29:31 EST 2008 | fctassembly
Hello Hoss Voidin/blow holes can also be exacerbated by residual flux. Have you experimented with dwell times and separation speed parameters with your selective ? What related parameters are you currently running processing under ? regards Jim
Electronics Forum | Wed Nov 12 10:58:56 EST 2008 | ck_the_flip
Jim, We are experiencing voids, also at Selective, on a transformer with known flux residue issues. The supplier told us they were using a OA, or RMA flux which has to be cleaned, and we accepted these parts anyway. How does the "separation speed
Electronics Forum | Wed Nov 12 17:36:43 EST 2008 | gregoryyork
If its an OA flux then this too acts similar to HASL flux in that they are very hygroscopic and would attract moisture and that would blow out the solder causing a void. Remember these fluxes have very high boiling solvents that do not get volatised
Electronics Forum | Thu Nov 06 10:21:38 EST 2008 | mendcorp
Does anyone have a glass dome intallation process of Silicone dome cast that can survive the standard IPC reflow profile for lead-free processes? Please shear it with us.
Electronics Forum | Mon Nov 10 14:26:16 EST 2008 | slthomas
It'll just transfer the load to your compressor, and who knows how efficient your venturi pump (which can also be noisy) will be (IOW, how much load it puts on your compressor is anyone's guess)? I'd just replace or rebuild the vacuum pump, person
Electronics Forum | Wed Nov 12 11:18:13 EST 2008 | davef
Consider calling used equipment suppliers. Often, they keep the manuals for equipment in a "library" because they're unsure if they will get a manual with the next piece of that equipment they buy to resell. So then, they can make a copy to go with t
Electronics Forum | Thu Nov 13 04:00:35 EST 2008 | phomann
Hi Dave, Thanks for the reply. I'm trying that but not with a lot of success. Cheers, Peter.
