Electronics Forum | Wed Sep 10 11:34:05 EDT 2008 | patrickbruneel
Amen to that!!! When I was still on the production floor and had problems I couldn't go to the production manager and tell him/her we had to shut down the production line and have the boards send in for analyses. (He/She would have seriously questio
Electronics Forum | Wed Sep 10 14:56:57 EDT 2008 | rarnold
I am dealing with a similar uncoalesced solder issue. This defect has come and gone several times during the last 6 months. See image. In my case, I am using conventional SnPb solder and an entire strip of my OSP finished board (includes various de
Electronics Forum | Thu Sep 11 11:12:52 EDT 2008 | aj
Hi, I had similar problem a while back. Diagnosis was a combination of two things: 1 - Gold thickness was below spec. which gave us solderability problems. There should be other areas of the board that show signs of this. 2 - The devise in queast
Electronics Forum | Thu Sep 11 14:47:40 EDT 2008 | rarnold
For Production purposes, the problem goes away when a new solder paste lot is used. As I reported in my first message though, the problem keeps coming back. Most likely, paste lot is not the Root Cause (3 different lots now in the last 6mo). I rea
Electronics Forum | Tue Sep 09 09:04:17 EDT 2008 | davef
Oh that's GREAT. Now, we're encouraging engineers blow to saliva on boards. The saliva is made 99.5 percent of water and 0.5 percent of dissolved inorganic compounds. One third of the 0.5 percent are dissolved metal-ions such as Ca2+, Na+, K+, Cl- a
Electronics Forum | Sun Sep 14 06:37:11 EDT 2008 | johnjohn
Hi All, I am trying to work out the OEE of my NXT equipment to IPC. I am presently trying to work out what metrics I need can anyone help me with this. I think I need the following Machine rating IPC 70% of machine rating, cycle time, What I am tr
Electronics Forum | Fri Sep 26 12:16:28 EDT 2008 | jsmale
Has anyone seen this? - We have a new smt pcb with 2 x LF356 (Op-amp) IC's on it (plus others). When the pcb is flexed the O/P of each IC changes by �2mV DC. i.e. the board is acting like a strain gauge! There is no oscilation and when I replace th
Electronics Forum | Thu Oct 02 12:22:26 EDT 2008 | JerryS
Hello Ok there is not much info here. What you have to mae sure of is several key factors. 1. Have you entered the correct stencil thickness. 2. Are you using the stencil gerber (not the paste layer) The paste layer is usually not adjusted for ap
Electronics Forum | Tue Oct 21 11:42:04 EDT 2008 | arosario
Hi Shooter, we're not using AOI but we do every 30 minutes sampling Inspection on the board and we're not seeing insufficient paste deposit so far since we started. But I agree with you that seemed my printer is not printing consistent amount of pa
Electronics Forum | Mon Oct 20 17:03:05 EDT 2008 | davef
Josh From looking at your pix, we don't have a clue. [And we're going down to the nurse's station to get our eye checked because we don't black bubkus.] More than anything else the: * White on the pads could be solder * Copper-penny brown on the pad
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