Electronics Forum | Thu Jan 12 15:50:50 EST 2006 | Cmiller
I would agree with JAX for a general estimate. If you have a few specific boards Universal can put them in a simulator and give you pretty close estimates. I would reccomend you go to thier NY facility and actually run some boards and get to know the
Electronics Forum | Wed Jan 25 03:29:04 EST 2006 | Neil
I agree Rob, The main thing is that you don't beleive everything without question. If you're sure the supplier knows what he's doing and you have a good relationship with him then a declaration should be OK. When doubt arises it is worth getting sam
Electronics Forum | Thu Mar 30 12:57:21 EST 2006 | cyber_wolf
Fuji has said a lot of things in the past, then changed it later on. Just for the sake of argument....The guys that have trained me worked at Fuji for a minimum of 12 years. Not quite sure what Tech is talking about, but I do not recommend doing w
Electronics Forum | Wed Feb 08 04:08:35 EST 2006 | fctassembly
Hello Greg, I agree with you that the article in SMT Magazine should be studied very carefully as it contains many errors in respect to SN100C. The testing performed was a DOE and was not an optimized run. There is also a statement on dross generatio
Electronics Forum | Tue Jan 31 14:23:39 EST 2006 | samir
Chunks, For our lead-free eval, we had the same problem with "charred looking" solder paste up the component termination of one of the smaller discretes, coupled with excessive solder balling...this smaller part did see peak temps in the 240 range -
Electronics Forum | Wed Feb 22 12:06:23 EST 2006 | Chunks
I agree with Steve and would hate to have Ken audit me. "Mrs. Chunks, sure your profile looks like the manufacturers recommended spec, your oven is calibrated to the best you can do or afford, your profiler is also calibrated to the best of your cap
Electronics Forum | Fri Feb 24 13:39:35 EST 2006 | Chunks
I agree with Jerry. A 7 mil stencil should work just fine for 25 mil pitch parts and 0.050 pitch BGA's. I too go 6 mil, but whith proper screen printing, you can 7 mil. You can always do 5 ot 10% reductions if needed. Use the homeplate design on
Electronics Forum | Thu Mar 23 10:02:09 EST 2006 | Joe
Check placement pressure. I agree with the "smushing" theory. If you can place the component with less pressure, I'd do that first. A switch to Type three paste is also a good idea, as long as your minimum aperture dimension remains at 0.009" as you
Electronics Forum | Mon Mar 27 15:10:48 EST 2006 | ms
Hi Steve Thanks for your reply. Your comments make it sound like it may be the nature of this paste. Any one else agree? Paste control is fairly good. Paste is put in fridge straight after it arrives at inwards goods, (4deg). Removed from fridge
Electronics Forum | Thu Mar 30 07:54:58 EST 2006 | Wave Master Larry
LIsten I'll have to diagree with you there.Now Im not the biggest expert at screen printing at my place of employment its a different department than wave which is my primary expertice but I see those UP20000 printers are always down with problems.
