Electronics Forum | Sat Aug 04 07:44:25 EDT 2007 | davef
Thermal cycle* * Requirements for and troubleshooting of poor barrel fill => Hole fill
Electronics Forum | Mon Aug 06 15:34:34 EDT 2007 | Hussman
I assume you are ref to top side wetting. In that case you may need to spray the top side of the board with flux to get it to fill. I would suggest ceaning the board afterwards. And yes you can rerun boards through the wave several times. Most pa
Electronics Forum | Tue Aug 15 15:26:56 EDT 2006 | Ben Jong
HI, I had a question for very generalise questionires from my Kitting dept with very usual enquiries prompting me that : For the after open seal solder paste tube later kept inside storage, how long that half way use solder paste can be still conside
Electronics Forum | Fri Dec 16 10:45:41 EST 2005 | campos
Hi,, My doubt is regarding to the Reflow Time, I mean, in a 5 or 7 zones oves, how long the board should stay inside the oven to complete the soldering cycle? 4 min, more, less...Should I keep low temp until peak for a long time or high temp in shor
Electronics Forum | Fri Dec 16 08:00:26 EST 2005 | jax
What you are most likely dealing with: Insufficient Pure Sn layer ( multiple causes ) Because elevated temperatures accelerate the diffusion process, the thickness of the Pure Sn layer will reduce during every thermal cycle... ( bakeing PCBs, S
Electronics Forum | Thu Jan 15 03:20:59 EST 2009 | sachu_70
Hi Andrzej, I guess you mean peelable solder resist. Good idea to try during R&D, but certainly not a solution on production floor. Also, few constraints to be considered such as presence of entrapped air between component and solder resist, the natu
Electronics Forum | Sat Aug 04 03:39:39 EDT 2007 | ahdo
Good day, can i seek an advice regarding wave soldering. Will it be advisable to reload the board two times to improve its barrel fill volume? If yes, what is the maximum number of times we can repeat wave soldering on the same board. If no, what
Electronics Forum | Thu Sep 06 17:37:05 EDT 2007 | hakerem
Hi Joris - There is an excellent wave solder guide called "Take No Prisoners" that includes instructions for attacking and eliminating solder balls and preventing their recurrence: 1. Increase Dwell Time Solder balls are normally caused by too much f
Electronics Forum | Mon Sep 10 12:27:32 EDT 2007 | hakerem
Hi Dave - You are correct that I was not clear in my comments. I assumed Joris had seen the usual solder balls accompanying his blowholes. Nevertheless, Joris, my first two recommendations still stand. Increasing the dwell time of your leads in t
Electronics Forum | Tue Aug 28 06:17:11 EDT 2007 | jgrootkoerkamp
I have problems with blowholes during the wave soldering process. I already find out that the stock time between reflow and wave is the most important. The longer the boards are in stock the more blowholes we have. We don't have a climat controlled
