Electronics Forum | Fri May 19 14:33:30 EDT 2000 | Lawrence A. Groves
I did this at one point and found that the handleing is critical. What usually happened is that two of the PCBs would touch and the edge of one would scrape the parts off the other. I tried a couple of different epoxys and ended up with a CIBA prod
Electronics Forum | Wed May 17 12:22:54 EDT 2000 | JAX
Ramot, Without further explanation everyone here is just taking stabs at it..... Sounds normal, I'm game! Have you looked at board finish(HASL?)?? Measured paste height?? Are they always off in the same direction? If not, Handling?? What are the sp
Electronics Forum | Fri May 05 11:11:05 EDT 2000 | Stefan Witte
The placement defect rate also depends on the shape of the components. 0402's have a higher defect rate than 0805's for example. If the board is very dense populated, chances are that a misplaced part knocks off another part and all of the sudden the
Electronics Forum | Thu May 04 11:18:34 EDT 2000 | David
We are going to have 29x29 tubular frame stencils. We are going to use a stencil washer machine. We are going to have a Metro Stencil rack to hold the stencils. How can I mark the outside of the stencils so I can see what job it is for and so that i
Electronics Forum | Tue May 02 11:13:02 EDT 2000 | Ashok Dhawan
I am finding transparent fibres , specks or needle shaped threads inside my via holes. I am not sure these are fibre glass / epoxy or flux. I do not find many on bare board. The flux used is NC Low residue and this assy is Single sided . Presently
Electronics Forum | Fri Apr 07 10:26:01 EDT 2000 | Ashok Dhawan
I have come across a number of cases where Solder Mask is chipped off or scratched. I was wondering this has anything to do with : **Packing of PCBs in stacks and vacuum sealed **Stacking of PCBs prior to print operation What is general practice i
Electronics Forum | Thu Mar 23 00:47:00 EST 2000 | Donnie DeYoung
Mark, If you find out anything please let me know. The only way we do it is by hand using a slotted spoon and dumping the lead and dross into a 3 gallon bucket and having it taken off site and recycled. It's a pain in the neck, and I don't like we
Electronics Forum | Fri Mar 10 09:13:22 EST 2000 | Nancy V
Dave, Your response might have been helpful if you would have left off the extra, comical(?), comments. I am American and I still couldn't figure out what you were trying to say sometimes. Searching the web to find an ESD program and training seem
Electronics Forum | Wed Mar 01 17:29:30 EST 2000 | Eldon Sanders
Thanks Dave for your reply. I have found a supplier that can cut it, but I am trying to save the tooling cost and the minimum purchase dollar ammount imposed by the supplier. If an off the shelf item existed I could buy what I wanted when I wanted.
Electronics Forum | Thu Feb 24 16:35:02 EST 2000 | D Scott
Larry, I have seen this problem on our IP-3 also. You can recover from this without powering down by going into the I/O page and turning off that particular function. The machine should be fine once you exit out of the I/O page. It almost acts like
