Electronics Forum | Thu Nov 03 14:23:58 EST 2005 | Samir Nagheenanajar
Thank you for the advice. I am not so concerned with the "2nd reflow", as the same can be said for double sided reflowed PCBA's (the bottom-side parts essentially go through a 2nd reflow). As for the HASL, there is a formula in calculating how much
Electronics Forum | Tue Dec 20 16:56:53 EST 2005 | rsmith
I manufacture ESD supplies such as smocks and conduct ESD audits from time to time. With that said, here is my deal on smocks...ESD smocks work well to shield harmful static charges on clothing such as wool, silk, and synthetic fabrics. It is like we
Electronics Forum | Mon Apr 17 22:52:02 EDT 2006 | daxman
Okay, we got the machine back together about 2 weeks ago, cleaned the clutches and measured the placement accuracy. We are back up 100%, and have not seen any stn 17 & stn 19 nozzle errors. Thanks guys!! 19 of the 20 clutches are really tight; they
Electronics Forum | Tue Jan 24 07:43:45 EST 2006 | Chunks
Q: If you do not use a selective wave pallet does this not leave the possibility of solder flowing up thru the Via's on the board? A: No. Your board house can cover your vias with solder resist. Your board house can plug the vias. You can cover t
Electronics Forum | Fri Feb 10 12:09:53 EST 2006 | cyber_wolf
Russ, We use a unit called a Datapaq surveyor to monitor our ovens. Its basically a unit that a data logger rides through the oven in. It has 3 thermal couples across the top and 3 across the bottom. It takes measurements the full width of the proces
Electronics Forum | Mon Feb 13 10:13:50 EST 2006 | slthomas
I have been through this before. At a med. device company they required every device that performed a measurement to be calibrated. O-scopes, calipers, 6-inch steel rules, etc. And thermocouples. While I can't see what difference it makes to the pr
Electronics Forum | Wed Feb 15 21:18:03 EST 2006 | Spilly McNugglets
It's cumbersome. Also if it catches a part partially after initial set-up, you'll get missprints. We had one and caused about 15% missprints. Once removed and hard pin in place, no missprints. Defeats vacuum board hold down too, from all of it's
Electronics Forum | Thu Mar 30 07:54:58 EST 2006 | Wave Master Larry
LIsten I'll have to diagree with you there.Now Im not the biggest expert at screen printing at my place of employment its a different department than wave which is my primary expertice but I see those UP20000 printers are always down with problems.
Electronics Forum | Mon May 01 23:23:58 EDT 2006 | grantp
Hi, I off center idea we used when we started. Get a pasta cooker, and put in vapor phase fluid, and then use that. Place the product in the bottom of the inner pot, and then heat on a small hot plate. When the vapor cloud gets high enough and the
Electronics Forum | Mon May 22 15:46:49 EDT 2006 | adlsmt
Grant has a good idea, we started that way also. We made a tank out of stainless steel with copper tube coils about 18" off the bottom. Circulate cold water through the tubes to condense the vapor to keep the loss down. We used electric burners under
