Electronics Forum | Fri Feb 04 15:45:36 EST 2000 | jseagle
For a single board that takes 5 minutes to build on my machine, is it better to do it as a single board or a 4 up panalized board that will take 20 minutes to build? And why?
Electronics Forum | Thu Oct 28 13:36:14 EDT 1999 | Bart Smith
I am a design engineer and have a circuit board design with a 292 pin BGA on it. The board manufacturer is experiencing a failure rate of about 2.8% on the BGA device due to soldering problems. This is my first experience with BGA. How does the 2.
Electronics Forum | Wed Aug 20 10:31:41 EDT 2003 | billdampier
We have some new customers that are requiring class 3 IPC standards, and my question is, how would that translate into a labor rate increase as compared to class 2 rates? I'm assuming the labor quote would increase by at least 15-20%, if not more. An
Electronics Forum | Thu Feb 10 08:25:02 EST 2005 | marakas
Could anyone advise what BGA rework rate we should expect with product that has 4 BGAs (224 pins, 196 pins, 160 pins, 48 pins). Negative factor is that we have old and tired pick & place - Panasonic MPA-G1 or MPA-V without AOI.
Electronics Forum | Mon Sep 16 09:47:33 EDT 2013 | dilogic
I would appreciate if you can share your experience with pick failure rates, preferably for 0402 parts. Also, what percentage do you consider acceptable?
Electronics Forum | Tue Dec 18 15:05:58 EST 2001 | blnorman
What is the maximum allowable thermal ramp rate for wave solder. We have a "short" machine used for selective soldering. To get the boards up to temp, we need to exceed our normal 2�C/sec. Are there any IPC documents governing this process? Anyon
Electronics Forum | Wed Sep 18 15:41:59 EDT 2013 | cbeneat
For 0402's, if the operator is paying attention, our equipment Panasonic CM 402/602/NPM's run at about .001%. Again this is dependent on an operator that pays attention to the fail rate. We usually don't have too many problems with 0402's, LED's ar
Electronics Forum | Mon Feb 07 14:20:32 EST 2000 | Rob Cass
Takes 5 minutes?? Does that include the 3 - 5 seconds for loading and fiducial inspection. If so it 12 - 20 seconds you will save with a panel. Depending on the panel you may be able to use just a board break fixture. Reduce handling when you can.
Electronics Forum | Tue Dec 18 16:49:17 EST 2001 | davef
J-STD-001 - Requirements For Soldered Electrical & Electronis Assemblies is the governing document. It defines no specific limits like you mention. It states words to the effect that preheating should not do bad things.
Electronics Forum | Mon Sep 16 13:57:31 EDT 2013 | emeto
By tape manufacturer you can have up to two empty slots in the tape. That means you should have two retries after the first pick up.
winsouce.jpg)
