Electronics Forum | Fri Mar 12 22:50:00 EST 2004 | JHahn
We pull our chains and fingers off of our wave and take them down to Carquest autoparts store and have them soaked in an engine degreaser. The then re-lube the chain and re-grease the rails when we first put the chain back on. This is the cure that
Electronics Forum | Tue Apr 13 08:19:52 EDT 2004 | arcandspark
The PCB's we are seeing the voids on are made of some material called Thermount, not FR4. The pads are very easily pulled off if any touch up or rework is done. The voids I am seeing are (hugh) 50% to 75% of the Solder Ball volume. The last new batch
Electronics Forum | Fri Jun 25 13:25:04 EDT 2004 | russ
Sounds like the wrong reflow profile was possibly used on this batch, Or you have a lead solderability problem. Usually you will pull a pad off of the board instead of the lead out of the solder joint. When a lead is torn from the joint it will ha
Electronics Forum | Mon Aug 23 21:08:48 EDT 2004 | cyber_wolf
One thing to try : Pull the Cognex card out and physically re-seat the memory sticks. Then take a kimwipe or something comprable and wipe the card fingers off with alcohol. We have seen this before. You don't even want to know what MPM will charge
Electronics Forum | Fri Apr 08 13:55:05 EDT 2005 | chrispy1963
Grant, Yes they do get broken by the operator or whom ever is loading or unloading the feeder stick pulling the tape through the feeder and the component pocket will snag the tip of the plow and bend it so that the tip ends up breaking off making
Electronics Forum | Tue May 10 12:12:42 EDT 2005 | dougt
We had an outside vendor that built a particular board for us. When there were problems with the new board 9 times out of 10 the case of the oscillator was shorted to the lead as mentioned in the post above. The fix would be to draw some of the sol
Electronics Forum | Tue Aug 02 11:17:27 EDT 2005 | Stefan
Tape feeders usually have a fixed pick position regardless of the package size. Is the component body off center in the tape pocket? I hope you can enter an offset in the feeder set up file. Also, perforation holes can deform, if the reel is too hea
Electronics Forum | Fri Jan 13 08:59:29 EST 2006 | james
We built some boards with incorrect Bgas and we had to pull the bad ones off. I need to know if we need to bake the boards before we add the correct BGAs on and resend through the reflow? We need to get these boards shipped asap after we install th
Electronics Forum | Wed Jul 26 11:14:50 EDT 2006 | FredC
Are these covers repacements for the tape guides? If so in retipping many thousands of cp6 nozzles we see that the window in the tape guide is often miscentered and the needle tip rubs on the same place every time it picks. I expect the miscentered g
Electronics Forum | Wed Feb 21 21:01:57 EST 2007 | davef
Yes. Heat reduces OSP solderability protection thickness. For instance, many OSP are shot at the end of the first reflow pass and the exposed copper is free to oxidize. If you're speedy, you can pull-off the second reflow cycle before the copper g
