Electronics Forum | Wed Jul 21 14:33:56 EDT 2010 | davef
Bingo!!! Craig: You say, "I have seen several instances where the same component turns brown located directly next to another that does not." What's the difference between the two?
Electronics Forum | Mon Aug 02 09:49:12 EDT 2010 | vetteboy86
My problem is that a 10k 0805 chip looks fine next to a 100k 0805 that is brown.
Electronics Forum | Thu Jul 15 15:16:26 EDT 2010 | leemeyer
I am looking into pick and place machines that are spec'd to place 01005 components. Does anyone know of a inexpensive make(50 - 75K $ new) that can place these parts. So far all that I have found are 150K and up. Thanks
Electronics Forum | Thu Jul 15 16:29:54 EDT 2010 | dilogic
I am trying to locate procedure for PWC calibration/adjustment on GSM1/2 machines (after moving feeder plate), but can't find it in the manuals. I would appreciate if somebody can give me a hint... - Deni
Electronics Forum | Fri Jul 16 11:27:57 EDT 2010 | davef
Consider: * Bow & Twist IPC-TM-650; Method 2.4.22 * Previous threads on SMTnet, like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=54498
Electronics Forum | Tue Jul 20 16:02:12 EDT 2010 | mikesewell
You may want to look at IPC 7721 Method 3.2 Bow and Twist Repair. In extreme cases you may need clamp or weight the pcb with bow in the other direction to yield a "flat" pcb in the unrestrained state. You will have to take the PCB up to or slightly
Electronics Forum | Wed Jul 21 11:12:05 EDT 2010 | remullis
I have some 13" long boards that warp considerably during first pass through reflow (no center support), what I've done to improve this type of warpage is stiffeners along the front and back edge. This may help with twisted boards as well.
Electronics Forum | Wed Jul 28 08:41:47 EDT 2010 | vetteboy86
I believe we are seeing some wetting issues as we have tried to bake these assemblies ourselves. Our PCB supplier is coming in next week to address the issue. Is there a rule of thumb or formula for determining correct parameters. Thanks
Electronics Forum | Sat Jul 17 12:42:24 EDT 2010 | oakie70
How do you merge two databases in UCT 52? Or for that matter, does anyone have a book out there for UCT 52?
Electronics Forum | Fri Jul 23 02:17:26 EDT 2010 | joseph_smile
by viewing your posting i came to know this is solder ability issue which is because of marginable solder ability of PCB / components, just ensure that issue due to PCB or component . check the msl of of substrate / component. verify the baking r
