Electronics Forum | Thu Jun 06 16:26:36 EDT 2002 | Bob
Thanks for all the input. It is pretty much what we have checked for, microscopic analisys before printing, assembly and reflow, but like we all seem to agree one ball of solder is hard to find. The boards are full QWERTY keypads with a few LED's a
Electronics Forum | Tue Jun 04 20:47:10 EDT 2002 | russ
A company I used to work for did not use wrist straps in some areas for the same reason. We had a conductive floor (not dissipative wax) and ESD shoes and heel straps that we tested three times a day. If you can ensure that feet are always on the fl
Electronics Forum | Thu Jun 20 17:40:03 EDT 2002 | pjc
Depends on which Assembleon machine, aye? The "GEM" line, Topaz & Emerald, stuff is Yamaha- Japan, which I consider more along the lines of Juki and i-Pulse (Tenyru/Yamaha), and maybe Samsung. The "Power" line, ACM & FCM, on the other hand is pure Du
Electronics Forum | Mon Jul 08 08:31:19 EDT 2002 | davef
Use where operators need to move frquently, say around process machiney, like placement or wave solder machines 2) wrist strap with continuos monitoring => => Use where operators don't move much and the potential to damage product is high, like a han
Electronics Forum | Wed Jul 10 04:53:47 EDT 2002 | redmary
a leakage exists in the capacitor net (1206), which cause the voltage down so much. the process flow is: printing-placement-reflow-hand load-wave-depanel-FT. I find possible stress maybe exists in the depanel stage, does the extra stress cause the ca
Electronics Forum | Tue Jul 16 00:53:39 EDT 2002 | kennyg
What is a typical time/temp baking cycle for an assembly prior to BGA rework? This bake is intended to prohibit PCB or nearby component damage as well as protect the component being removed for reball. A 24 hr bake at 125C would be great, but often
Electronics Forum | Thu Jul 18 12:17:30 EDT 2002 | pjc
Machine efficiency is a big one. Placement and auto-insertion machines should have the production rate for a given product recorded in the Routing, Time Standard or Work Instruction. If a given board has a tact time of say 1 minute and you ran 1,000
Electronics Forum | Wed Jul 24 07:18:12 EDT 2002 | lloyd
Hi, We occasionaly have problems with some of our panellised boards breaking away from each other. The section joining them is very small and makes the assembly weak. The boards are normally broken off during our through hole process (bad handling)
Electronics Forum | Thu Aug 01 10:09:31 EDT 2002 | sueph
Dave, I would have never thought of the sheet metal box. My west coast contact, who has dealt with this type of board before, told me yesterday to go ahead and try it at this profile anyway, as the metal plating holds more heat. I was pleasantly
Electronics Forum | Tue Jul 30 13:58:26 EDT 2002 | dragonslayr
To all SMTneters: I am seeking recommendations for software packages. I will be managing a Document Control Center for a Contract Manufacturer. I am aware of the functions, duties but do not know the commercial names of software needed. We will be ne
