Electronics Forum | Thu May 19 07:06:59 EDT 2005 | py
have you some GND layer inside the pcb ? see IPC 610 A
Electronics Forum | Thu May 19 17:03:11 EDT 2005 | splice1
Hi all, There are no ground layers which makes the non wetting rate a bit confounding. The foam fluxer has not been cleaned in a while though, while there is a strong evidence of fluxing by running blank paper and looking up the top side
Electronics Forum | Wed May 18 14:58:05 EDT 2005 | splice
Hi, I am having some PTH non wetting issues. Setup and chronology of events is explained: Set Up; Part: 1 MM pitch connector 378 pins Solder: Kester Ultra Pure 63/37 solder Pot; 250 C pre heat; Peak 94C top side Flux: Qualitek 775, Fluxer: foam T
Electronics Forum | Thu May 19 13:03:18 EDT 2005 | russ
On the non-wetted holes put a solder iron to them and see if they "bubble" if so, you have some outgassing in your PCB and they will need to be baked prior to assembly. If this is okay I would investigate the grnd layer that was mentioned. What is
Electronics Forum | Thu May 19 21:53:07 EDT 2005 | KEN
Is it possible your board is warping and skip plating? Have you run a lev-check? What does your contact patch look like? Do you have ice cikles (spelling???) or solder "flags". IF yes, your flux is consumed or nonexistant. What is your dwell time
Electronics Forum | Wed May 18 19:12:26 EDT 2005 | HOSS
Hello, Assuming that your dwell and coverage at the wave are in order..... Have you checked the angle and pressure of your fluxer air knife? You can only count on capilary action to a point. The air knife, set correctly, will help get your flux t
Electronics Forum | Thu May 19 12:50:19 EDT 2005 | splice1
Hi Hoss, Thanks for your reply. Yes I am seeing the flux flood over to the top surface of my board, so to an extent I am not concerned with the fluxer. I believ that the foam fluxer is functioning adequately.
Electronics Forum | Fri May 20 08:15:21 EDT 2005 | davef
better" doesn't make sense. Additionally with no preheat, primary side components see a large delta T when they hit the wave.
Electronics Forum | Thu Sep 07 18:32:51 EDT 2006 | vicknesh28
Yes the part is reworked. It solders when it's reworked.
Electronics Forum | Thu Sep 07 14:43:33 EDT 2006 | davef
Questions are: * So after you spot one of these leads sitting on a nice pillow of solder, what happens? * Do you rework the part? * Does it take solder? * What do you do to make it take solder, if it does take solder?
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