Electronics Forum | Tue Apr 18 10:56:35 EDT 2006 | jaymcgowan
I am working on a new product that has a flex circuit attached to an 8 layer motherboard. There are 25+/- connections. I am investigating hot bar soldering vs ACF (conductive film) to make the attachment. I am looking for literature/papers/experim
Electronics Forum | Wed Apr 19 10:27:30 EDT 2006 | russ
Look at your paste specs, they give you recommended starting points relating to speed and pressure. Dave F is right, it is usually about 1 pound per linear inch of squeegee length. Speed for finepitch printing should be started at about 1in/sec. T
Electronics Forum | Wed Apr 19 09:07:44 EDT 2006 | russ
Many times a pad that has no signal trace going to it will come off. It does happen from heat and time as noted before. Somtimes even the best rework person will remove them. If this can not happen in your situation I would recommend that you use
Electronics Forum | Mon Apr 24 15:11:11 EDT 2006 | pjc
For solder joint inspection you cannot beat AXI. That's what is was designed for. AOI machines were designed for component inspections and solder joint checking was an add-on. In transmission AXI you can get a measurement of the whole solder joint. A
Electronics Forum | Wed Apr 26 10:21:09 EDT 2006 | slaine
Hi you need to dip long enough for the temperature of the part being soldered to reach about 20 degrees above liquidus of the solder. For the small parts we dip solder we had Sn62 and SAC387 baths set to 250 degrees and this seems to work best for us
Electronics Forum | Thu Apr 20 06:32:45 EDT 2006 | aj
All, This is a bit off the beating track but its starting to be a real pain. I am unable to view PDF's in explorer... I just get a small image in the top left corner. It means I have to download pdf datasheets from another PC . I am not lazy but it
Electronics Forum | Thu Apr 20 17:51:14 EDT 2006 | Don
Immersion tin, if it is being correctly identified, is not a final surface finish for a bare board. White tin is typically the way a finish is refered to. Either way tin has gotten a very bad reputation via a couple satellite failures because of tin
Electronics Forum | Wed Apr 26 10:34:06 EDT 2006 | slaine
In England all domestic sockets are 3 pin, with an earth. You can quite easily buy a device that plugs into the socket and has 3 press studs on the back that connect to the earth. These are usually made for connecting ESD straps to. I know RS sell th
Electronics Forum | Thu Apr 20 14:24:54 EDT 2006 | pms
Sr.Tech, Don't know about AP25's, we have a DEK. We have problems with some large board sagging in the middle, causing the board to slip under the board stop, but our DEK has the ability to program the board stop anywhere in the Y direction, allowin
Electronics Forum | Thu Apr 20 14:33:18 EDT 2006 | dirk29
We had that problem with our printers we just drill and tap the top end of the stop and put a short screw in to allow us to adjust the top height of the stop and catch the board. Be careful not to make it to long or to could restrict the board from l
