Electronics Forum | Wed Oct 30 01:23:19 EST 2002 | jasper
Normally warp max 1% of diagonal board measurement is acceptable. What's your p&p like? Some will not experience problems at all! reg Jasper
Electronics Forum | Wed Oct 30 01:23:22 EST 2002 | jasper
It has been my experience that when all > conditions are as they are supposed to be there > should be zero or very little deflection. When > you start placing components with pick and place > equipment that does not have a Z pressure sense, > yo
Electronics Forum | Tue Mar 23 09:47:45 EST 1999 | Dan Hughes
George, No it does not make sense to measure the tension on a mounted foil, however, if you wish to please your customer you might want to find a tension gauge that measures in mils of deflection. In the beginning, screen tensions were all measured
Electronics Forum | Thu Jul 20 14:07:23 EDT 2000 | JohnW
Mike, we use carrier's as a matter of course on all wave products, it let's us keep the conveyor width the same all the time so speed's up change overs and eleimiates one more thing that can be set wrong. The main aim of the exercise is to be able
Electronics Forum | Thu Jul 20 20:39:02 EDT 2000 | craig
It's called a strain gauge with data manipulation software. They are used for load cells and the like. Hope that helps.
Electronics Forum | Tue Jul 11 12:52:16 EDT 2000 | JohnW
Hi Guy's.. Been a long time since I've been on the forum so let's start by saying..dave..great recipe!!!.. Anyway's why am I on for...ha yes board deflection Wave soldering is a fun past time at best, it's made even more fun when your board deflec
Electronics Forum | Fri Jul 21 15:26:59 EDT 2000 | Boca
You're going in the direction of fab improvement, a great direction. But in another direction; If you're already in a carrier, how about using a skyhook of some sort to support the middle of the fab from the top side? In some cases you can put fine
Electronics Forum | Mon Nov 27 08:05:50 EST 2006 | davef
There is no standard for a strain gage measurement of allowable deflection of a board or a fixture. It's possible that your fixture is causing the BGA cracking that you see. What protion of the BGA is cracking? If it is the solder connection, sear
Electronics Forum | Thu Jul 13 04:01:02 EDT 2000 | JohnW
Dave, Firstly..how the heck are you?..been a while.... Ok so I'm running an Electrovert Electra witha hot gas knife, & I've got large server boards going over the wave. I've seen us loose chip, mainly Tants on the hot gas knife...ain't good especia
Electronics Forum | Wed Jul 12 21:32:59 EDT 2000 | Dave F
John: Several thoughts: 1 What on your wave machine are these bowed boards catching on? It has to be something on either wave. Are you getting hung-up on the chimney? That doesn't seem correct!!! 2 Why do you want to measure the defection of y
