Electronics Forum | Tue Oct 26 08:17:54 EDT 1999 | William
Dave, Last question(s). What do I do about a gold porosity problem? Dave: How would I approach the board house to check for this? They use a very well known chemistry, but is that where the pblm lies? Or would it be in their process, cycle times
Electronics Forum | Mon Oct 25 16:12:52 EDT 1999 | Joe
Dave: Thanks for the info, I appreciate it. You start off by naming a +/- 2 sigma process, is that equivalant to an AQL of 0.25 ? What is a 6 sigma equivalant to? You mentioned the AQL at incoming inspection, what should that be in relationship to
Electronics Forum | Mon Nov 08 09:30:15 EST 1999 | John Burris
I just wanted to thank all of you who responded via e-mail to me regarding this subject. After a lot of looking and talking, I decided to keep using Unicam. I'm working on adapting my use of UC to fit my process a bit better, and hopfully, more effic
Electronics Forum | Thu Oct 21 10:13:19 EDT 1999 | Bill Bannister
The Brady PAM 5000 may work for you as well. I think they have a web site. This machine is smema compatible. It's automatically places barcode labels onto pcb's within an 18"x22" area with .020" accuracy. The labels can be placed at 0 or 90 deg onto
Electronics Forum | Sun Oct 17 23:17:01 EDT 1999 | MJI
I'm interested in the various ways to assure that the fingers on a wave machine are not bent or crooked - beyond a monthly or quarterly maintenance regimen. In fact, how do you know all's well even right after maintenance? That is, making sure that
Electronics Forum | Thu Oct 14 20:42:07 EDT 1999 | Jeff Ferry
Grace, As deifned in IPC 7721 Procedure 3.2 Bow and Twist Repair "Bow and twist after soldering shall not exceed 1.5% for through hole PC boards and .75% for surface mount PC boards. The bow and twist shall not be sufficient to cause difficulties d
Electronics Forum | Wed Oct 13 12:54:44 EDT 1999 | Dave F
Mikeh: You can't let that stuff get to your carbon bed. Literally, you can watch your bed die. The clay coats the carbon, entombing it. I've heard talk of using a RO filter as a front-end buffer to the recycling system, but know of no one who has
Electronics Forum | Thu Oct 14 23:19:25 EDT 1999 | Dennis O'Donnell
Water soluble masks are great in my book. After having used the latex type, I found that the water soluble will save a lot of time. I dont't use a closed loop system, but I do have a filter on my discharge line. I have not experienced any filter c
Electronics Forum | Tue Oct 12 16:38:24 EDT 1999 | Charlie
At present the band-aid fix is using epoxy 'dam' under the part and masking over the part to pervent excessive current leakage conmonent failure. These parts are first going through the reflow oven, where the epoxy dam is used to over come the leakag
Electronics Forum | Wed Oct 13 13:47:02 EDT 1999 | John Thorup
Jeff In my experiance the main problem is the flux content of the paste (up to 50%). throwing it in the wave pot results in a big stickey ring around the pot, a lot of smoke and, as Brian says, a lot of dross. A fire is not that unlikely! I tried
