Electronics Forum | Wed Dec 21 11:49:50 EST 2005 | dlkearns1
We have small blisters all over the bottom side of a heatsink the measures apprx 4" x 12", flat surface. Is there any chance someone can refer me to some standard or specs for usability, personally I think these little blisters would be ok and not in
Electronics Forum | Wed Jan 18 10:35:17 EST 2006 | pms
Thanks folks !! I'll experiment with the bottom side heaters. Unfortunatly I don't think our Vitronics-Soltec oven has the option for adjusting the heater fan speeds. And I'll check the conveyor chains. This is our first project using 0402 parts, wh
Electronics Forum | Thu Feb 02 21:14:16 EST 2006 | ____
Fuji America has feeder maintenance manuals for all of the machines. Some of them are on CD-ROM with a step by step procedure. For parts however, you need to be registered (Fuji Japan) so that you can enter the serial number and find the exact part n
Electronics Forum | Fri Feb 17 17:26:56 EST 2006 | mika
Hmm... how about the people inside this room; working in this dry environment? This is something never discussed highly, but I believe it is most certainly important for the human health. This is another interesting thing about RoHS; the side effects
Electronics Forum | Wed Feb 22 16:55:04 EST 2006 | mark
Hi, We are not using vaccum caps. The support pins for both printers is the same ande cover all board (components only on Top side of the PCB). I will check snap-off (right know setting 0.2-04. mm/s). I also suspected poor gasketing but clamps are o
Electronics Forum | Wed Mar 15 21:34:07 EST 2006 | Chunks In Cebu
I can see why he left. Not knowing your board or paste, but I would tend to say your profile is on the cool side. Unless your boards are very small and your conveyor speed is slow, I'd say this is no good. It looks like you're using the old "ramp,
Electronics Forum | Thu Mar 09 16:14:23 EST 2006 | operator
We are fixing to run a board with both pb and pb-free BGA's..double sided.. The board is RoHs compliant so I could go either way on the solder paste. I was thinking pb-free paste would be the best bet. Any opinions would be greatly appreciated. Th
Electronics Forum | Mon Mar 13 22:29:50 EST 2006 | davef
Warp depends on: * How close the board gets to its Tg during the reflow cycle (the closer you get to the Tg the worse the warp gets) * Amount of copper on each side and the balance between the two * Thickness of the board * Overall length x width * T
Electronics Forum | Fri May 26 11:05:15 EDT 2006 | jbrower
Hey Pete. I agree, 250c is a bit on the high side, I'm working with the EM907 paste and getting great results witha top end of 230-236. Best of all, our CEO had a very dificult time telling which board was lead free and which was lead. Have a great
Electronics Forum | amol_kane |
Fri Apr 14 10:16:37 EDT 2006
