Electronics Forum | Mon Nov 24 17:27:39 EST 2003 | rrr
typically when i've seen this problem it is because the back of the mylar is sticky. Have you tried different parts?
Electronics Forum | Thu Aug 23 15:38:58 EDT 2001 | mparker
Bingo - the mylar is the problem. Ask the fab vendor what storage and humidity controls they use on the photo tools. The films can changed geometry from day to day depending on the ambient environment. What controls are used during production? The ra
Electronics Forum | Thu Aug 23 12:46:30 EDT 2001 | mkallen
In this case, I know my supplier's data is good. They've been supplying this particular PN for a long time now, and the stretch problem appears to be random within a given date code (i.e., most of the boards in each lot are good, but a few exhibit t
Electronics Forum | Mon Dec 23 18:06:38 EST 2002 | jersbo
Tried and True is counting your components if there is any indication of loss... this is a great TOPIC... unfortunately there are many ways to lose components. Feeder setup,problems with a feeder while in the machine(IE mylar problems or wrong step)
Electronics Forum | Tue Mar 17 12:51:01 EDT 2015 | cyber_wolf
Are you referring to the mylar cover tape ?
Electronics Forum | Mon Oct 22 10:35:54 EDT 2007 | mulder0990
We use Microsoft Access to track our feeders. I have made a system for the machine operators to tag the feeders when they run into problems. We seem to be having a lot of pitch issues. I am wokring on geting a calibration jig to solve that issue.
Electronics Forum | Mon Sep 26 14:09:08 EDT 2005 | slthomas
"Note: nothing changed to the process, the problem come out of sudden." Did this happen with a batch of boards you'd been running a while, or was it a new batch (lot/date code)of boards? I'd be inclined to suggest that the environment that your my
Electronics Forum | Mon Sep 13 04:11:27 EDT 1999 | Earl Moon
| | hello | | | | having a problem with one customers bare boards not matching my stencil apertures. i design stencils based on gerber data and reduce up to 15% on some pads. do some board houses reduce pads after receiving gerber data???why would
Electronics Forum | Thu Dec 03 13:24:12 EST 1998 | Russ M
| | | Does anyone have any information or experience with the use of conductive epoxy in leu of solder. I have a unique application that might lend itself to this technology. I am looking for manufacturers, printing, curing and reliability info. | |
Electronics Forum | Fri Dec 04 13:25:34 EST 1998 | Jeff Sanchez
| | | | Does anyone have any information or experience with the use of conductive epoxy in leu of solder. I have a unique application that might lend itself to this technology. I am looking for manufacturers, printing, curing and reliability info. |
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