Electronics Forum | Mon Jan 07 09:25:55 EST 2008 | pjc
One per operator is the optimum for obvious. 3 to 4 per operator is more typical. The number is not as important as the type and time. Like don't have someone handle 2 different TO92 part nrs., splitting them up to different operators eliminates the
Electronics Forum | Wed Jan 09 14:46:29 EST 2008 | chef
Besides changing fluxes, do you have good knowledge of actual flux volumes? Do you have a micrograms per square value? Pre-heats can affect flux by burning off too soon and also not enough - therefore moisture hits the wave- how's your humidity cont
Electronics Forum | Tue Jan 15 15:53:14 EST 2008 | jmelson
I only build my own products, so it has to meet my needs for QA only. I am doing some 20 mil lead pitch (0.5mm) and will soon be doing a 0.4 mm pitch part. I have more magnification on my microscopes (40X) but almost never need to go that high. If
Electronics Forum | Sun Jan 13 19:44:02 EST 2008 | grantp
Hi, We need to solder a USB plug onto a PCB in our SMT machines, and this is the same type of plug you see on USB storage devices. It's a very flat connector with 4 SMT pins, however the hard part is the bottom of the connectors is the same level
Electronics Forum | Mon Jan 14 17:36:29 EST 2008 | flipit
SWAG is right on the money. I had a 0.5 mil per pixel camera and a 1 mil per pixel camera. As you increase magnification your focal range goes down. So your part height becomes much more critical. Parts out of focus will be rejected to the dump b
Electronics Forum | Wed Jan 23 19:44:45 EST 2008 | hegemon
In addition to the pre-emptive steps mentioned above, in my experience there are certain BGA package designs that seem more prone to that corner bridging. I have seen some packages that will essentially "curl" down at one corner as the package begin
Electronics Forum | Tue Jan 29 14:19:29 EST 2008 | operator
Well, here it is. My responsibilities: 1.All Documentation (build packets, processes docs, etc...Even some administrational docs) 2. Oven profiling and everything that goes with it (customer interaction, board& component baking ) 3. ESD program et
Electronics Forum | Wed Jan 30 15:51:54 EST 2008 | operator
Steve, I am sure that is true in some instances, but they begged me to stay. More than once. The guy they got ended up s*xually harrassing and scaring most of the female employees and they eventually had to fire him because female employees were qui
Electronics Forum | Tue Jan 29 15:28:36 EST 2008 | jmelson
Well, I don't know if you want to muck around this much, but I bought a GE (Chinese made, of course) toaster oven with convection fan. Nice big glass door in front, you can use it in bake, broil, toast or convection oven mode. The only thing missin
Electronics Forum | Wed Feb 06 14:36:07 EST 2008 | dphilbrick
We had a customer that had 5 BGA's top and 2 bottom and several other assemblies that had 4-7 total BGA's that required WS. Our average build quantity was 2200 boards a month. We used high end Maytag dishwashers and a little Amterge(SP?) Took them t
