Electronics Forum | Wed Jan 17 20:33:19 EST 2001 | davef
The corner balls are supposed to collapse, but at roughly the same time as the other balls collapse. Also, those balls are located in the place that isthe easiest to get hot. Think about cranking-up the bottom heat, waiting, and slowing down the pr
Electronics Forum | Tue Jan 30 21:14:26 EST 2001 | davef
Suggestions are: * Limit pad width to 0.008" [0.2mm] * Use IPC-7525 Stencil Design Guidelines * Avoid Type 4 pastes, if you can * Slow down your print head to 0.63"/sec [16 mm/sec] * Consider the suggestions on printing by rpereira in the past
Electronics Forum | Wed Feb 07 21:51:49 EST 2001 | davef
You're correct that some folk have used microns and other folks have used u" when discribing their ENIG specification. It's likely the the micron folks misquoted their units and it's arguable that participants in the forum should have taken them to
Electronics Forum | Tue Mar 20 17:59:46 EST 2001 | Stefan
Dave, you may want to try an approach by categorizing upcoming issues by their priority. List the daily issues: machine down, operator sick, answer the phone... and give them a priority key (urgent, important, critical... ). Make a plan, on how to re
Electronics Forum | Fri Mar 23 10:57:09 EST 2001 | blnorman
Go to http://www.ipc.org/html/fsresources.htm, scroll down and click on downloadable resources and IPC-65-650 is there for the downloading, free. The problem is that you have to download each individual test method, you can't download the entire doc
Electronics Forum | Fri Apr 13 14:51:01 EDT 2001 | Mike R.
Some Selective wave solder jig designer milled down the jig in one depth which is based on the thickest part on the bottom side of the board. This will create problem on the warpage on the jig due to the heat coming from the wave soldering machine. I
Electronics Forum | Fri Apr 13 10:08:48 EDT 2001 | gcs
dgrenier is on the right track. We are a volume shop and with a up back stencil you can keep CFM line going with no down time. DMPO also at our shop have inproved. We also use AOI equipemnt as a process indicator to monitor when stenicls need to be c
Electronics Forum | Tue Apr 17 09:53:57 EDT 2001 | edylc
Hi Thrasher7, We called it wash boards, any misprint from screen printer was at tight control ..and those wash boards when being flow down to the line have an identifier /marker , is a matter on isolation of the problem..... But I still can't think
Electronics Forum | Fri Apr 20 07:30:14 EDT 2001 | wbu
In short: the measured deviation / the length this deviation occurs * 100% = % of deviation Actually we encounter mostly "twist" so we put the board on a flat surface, hold it down at the corners to see if any of the corners lifts, measure the heig
Electronics Forum | Wed May 02 22:33:44 EDT 2001 | davef
Silvio Dante (played by former E Street Band Guitarist Steve Van Zandt, in his acting debut) has even turned an extremely passing resemblance to Al Pacino [Godfather, Part III] into a personality; he�s forever curling down the corners of his mouth an
