Electronics Forum | Sat Mar 21 16:33:09 EST 1998 | Earl Moon
| | | Cpk's on top flight ovens (e.g., Conceptronics, Heller, Electrovert, Vitronics) vary wildly, from 1 to 2+, between different supplers. The suppliers don't seem to understand Cpk's. A supplier's rep whose oven has a Cpk of 1.0 told me: | | 1.
Electronics Forum | Tue Feb 19 10:09:48 EST 2002 | caldon
I always look at the support structure. This is where I feel the real Dollars and cents come into play. Sure you can calculate the derated value over months or years. But If your machine is in a "machine down" situation the derated value does not cha
Electronics Forum | Sun Apr 14 00:04:50 EDT 2002 | lysik
Just to let all the folks no. If you register (and pay the fee) a machine with any (OEM) company in the USA You have the same rights as a new user. Companies like UIC, Gen Rad, Agilent, etc came up with these fees to discourage buying used equipment.
Electronics Forum | Fri May 17 15:50:17 EDT 2002 | davef
Now that�s a switch. Most are moving or properly have moved in the polar opposite direction. Dano, has someone been drilling your teeth lately? We use water washable flux to: * Remove solder balls. [Or put another way, we don�t have to screw-down
Electronics Forum | Tue May 28 13:34:57 EDT 2002 | johnw
There is alway's squabbles when people talk about utilization and then there's the fabled effective utilization, which rumour has it is differnt. Most of the time as you say the benchmark's aren't really there and as Mark point's out it depend's on w
Electronics Forum | Wed Feb 26 21:38:08 EST 2003 | jonfox
1. First and foremost is paste alignment. If you start out of the gates with a bad paste/pad relationship, it will be nothing but problems down the line. AOI is not required, but dial in the alignment, QC if necessary, then introduce the boards to
Electronics Forum | Thu Jul 15 18:07:04 EDT 2004 | dwanzek
This has been a tough one to date. Any ideas will help. Problem definition � random QFP144 part not soldering all leads. Percentage fallout is about 1-5% of boards. Usually leads, one or more, on trailing side to the direction of travel does not wet
Electronics Forum | Mon May 16 22:59:40 EDT 2005 | davef
We believe your problem is caused by the mismatch in CTE of the material ised in your BGA. In fact, this "potato chipping" [where the corners curl-up] is present in all BGA. The issue is the matter of degree. [Mismatching CTE is how old thermostats
Electronics Forum | Thu Nov 03 14:43:19 EST 2005 | chunks
Hmmmm.... We never had to change any parameters when switching over to Gels. And no, we don't let the operators have kitty-wampus on our programs either. The Gels did get rid of broken parts. We have Run Orders of about 50 pieces. We change over
Electronics Forum | Sat Sep 16 12:49:36 EDT 2006 | magszoo
I'm hoping that someone may be able to shed some light on this error we've been getting on our DEK 265LT printer. Several months ago we began getting a "Rising table position error" after the operator would open the hood to load paste or after changi
