Electronics Forum | Sat Aug 02 08:12:05 EDT 2003 | davef
Q: So, can I concluded that this greenish "fungus" looking staff is not initiated from high hot air temperature setting ? A: Your temperature setting could have increased the growth rate of this crunchy looking stuff, but we wouldn't start there to
Electronics Forum | Sun Aug 24 15:00:46 EDT 2003 | Handsome zhang
I am placing a plastic Cypress, 256 pin BGA on a > small assembly, and I cannot stop the corners > from bowing. I've moved my profile up and down > with no results. Any suggestions? Hi mike I am a staff of smt in ASUS(TAIWAN),I have a large in
Electronics Forum | Wed Nov 19 16:35:27 EST 2003 | davef
We'd be incluned to dip the BGA ball in tacky flux, place the BGA on the PTH interposer, reflow that suka, and get on with things. [Take the people involved out to lunch with the money you save on not buying a stencil.] On damaging the glop top, we'
Electronics Forum | Thu Nov 20 09:19:01 EST 2003 | markhoch
What do they say? Not too much as of yet. (I haven't actually recieved them yet.) The parts are being custom made by my customer. I've already bought my stencil, so I'm thinking I'm just going to try and stencil the tacky flux right on the pads and p
Electronics Forum | Thu Jan 29 22:13:08 EST 2004 | davef
OK, I've got it. Here's what you should do: * Call your friendly, local electronic contract assembly shop. * Tell them that you are "Joe College", you currently build pin through hole boards, but want to start using SMT, and that you want to conside
Electronics Forum | Fri Feb 27 15:48:13 EST 2004 | pdeuel
Dose anybody know of a method of preventing board sag in the wave process. We have a 2 year old Deltawave. The product we are running is a one sided 10in x 12in panel of 6 PCB's. Pin headers and connectors are near all of the edges. Our current board
Electronics Forum | Tue Mar 30 12:10:31 EST 2004 | caldon
SMEMA is not just conveyor height. It also is Conveyor width, Edge Clearance, Tooling pins, Maximun Machine gap, and Lead in of conveyor. Additional, SMEMA is a machine communications Protocol for machine to machine or machine to conveyor communicati
Electronics Forum | Tue Mar 30 08:11:42 EST 2004 | steveliu
Hi, Has anyone here get some experience with SMT connector soldering? We were having really hard time to solder this AMP 50/50 Grid connector. Every connector installed has a few pins just sit on the solder. We use AIM 293DX2B NC solder paste, 60
Electronics Forum | Wed Apr 07 11:21:26 EDT 2004 | stefwitt
Hi Dilbert, it is a step up transformer from 3 phase 208 to 3 phase 380. Each machine does not draw more than 3 Amps per phase. However, circuit breakers are rated at 15 Amps. The transformer has three power outlets, each one has a Perilex (European)
Electronics Forum | Sat Apr 03 19:58:53 EST 2004 | Ken
I have used tooling holes and fiucial registration since the late '80's. In fact if your maximum "vision" tolerance is +/- 0.05mm, your in the same ball-park as locating pins. It is true that fiducial registration is more accurate. However, I woul
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