Electronics Forum | Wed Feb 09 13:07:01 EST 2000 | Jeff Woodruff
I have seen an issue that escapes our ICT and functional testing or operates in an intermitent fashion. The lead is slightly separated from the PCB with a fully formed solder joint behind it at the heel an toe. The joint apears to have started to tra
Electronics Forum | Fri Feb 11 13:36:40 EST 2000 | Finepitch Services
Jeff, I guess my experience in such issues always took me back to the screen printing process and I only want to bring up that portion of the possible causes to this case. When we talk about coplanarity, the component lead coplanarity first comes t
Electronics Forum | Wed Dec 20 17:33:00 EST 2000 | Travis Slaughter
I don�t have the answer for you but it would not be difficult to make a fixture to find out. Combine a counter, pneumatic cylinder, and a solenoid in such a way to do the job for you. Cylinder pushes the card into the connector, when contact is made
Electronics Forum | Tue Nov 07 09:21:27 EST 2000 | jackofalltrades
We see this type of problem with a couple of our boards. It has proven to be a problem with the board. During manufacture at the board house the thru holes for the connectors are plated a little too heavy causing a smaller hole. If you haven't alread
Electronics Forum | Mon Nov 06 16:27:48 EST 2000 | Boca
Bingo! Sounds like you solved your mystery. You've checked your key process steps, the product has been running in your processes for some time with no process changes. This all points back to one of your process input, i.e. the fab. Experience s
Electronics Forum | Fri Nov 03 08:27:11 EST 2000 | CAL
1) You also may want to contact your OEM to see if there is interest in purchasing the equipment. You did not state the age or condition of your equipment but the OEM's are buying back machines and refurbishing them for resale. The long lead times OE
Electronics Forum | Tue Oct 24 21:58:08 EDT 2000 | cklau
Hi; I think what you're looking for is something called "The cook book".The reason that call it that way is b'cos it contains all the needed information and example on how a particular component function in a circuitry.This book contains specificati
Electronics Forum | Mon Oct 09 20:30:53 EDT 2000 | Dave F
Good story. Bad idea. You need standards. You need training in those standards. Call IPC to get both. You're wasting time and money with this cockamamey scheme to outsource your inspection standard making. And who says the bozo or bozette tha
Electronics Forum | Fri Oct 06 10:19:21 EDT 2000 | JAX
Head, There are no rules on what is placed by machine. Some things to look at: 1. vision alignment issues a. board size ( FOV ) 2. Machine pick-up a. special nozzle b. off center pick-up (depending on machine this could cause a problem) 3. Re
Electronics Forum | Wed Sep 20 14:19:26 EDT 2000 | Jason Wraight
I am sure that this is a problem that will never be solved, but something that I am seeing in increased numbers. Often refered to as "Black Pads". After production, returns from the field coming back with contaminated pads under various components.
