Electronics Forum: (4) (Page 512 of 662)

Re: HASL - again?

Electronics Forum | Fri Jun 18 14:06:15 EDT 1999 | John Thorup

| | Now don't everyone jump on this at once, but it seems time for me to send out copies of my not even close to being dated copy of an article about HASL. Though it was published in 1992, in Printed Circuit Fabrication Magazine, and it got rave revi

Re: I'm baaack!

Electronics Forum | Wed Apr 21 09:47:19 EDT 1999 | Chrys Shea

| Jeez, | | I just about had a fine Mexico thing going, or was that in my dreams? Probably, but thanks for the future X possibility. | | OK! Let's keep this thing technical. Let us not dwell on the emotionally charged moment of my return. However,

Re: feeder width

Electronics Forum | Tue Mar 30 10:57:54 EST 1999 | Steve Gregory

Hello, I'm a student assistant in a research project that deals with the simulation of PCB assembly systems. At the moment I collect information about SMDs. My problem is how to assign the correct feeder width to various devices in a simulation. Is

IPC 4101

Electronics Forum | Wed Mar 03 17:09:55 EST 1999 | Tom Reilly

We have recently had problems with bare boards coming in too thick. I would like to know how to properly specify the minimum and maximum thickness using the 13949F and IPC 4101 specs. (We currently use "MATERIAL: GFN 0620 C1/C1 A2A per MIL - P - 1394

Re: White layer appearance on PCB

Electronics Forum | Thu Jan 28 15:53:12 EST 1999 | Dave F

| | Hello Netters, | | | | I need some info, Earl or Dave, I have a PCB that exhibits a white layer on solder side. It does not appear to be surface residues (IPA has no effect), but looks like its under solder mask. My first guess is that the LPI

Z-axis panel movement on full perimeter routing.

Electronics Forum | Wed Dec 30 09:47:52 EST 1998 | Paul M

Hi All, I work with CNC Routers . I use full perimeter routing of double sided populated panels, in a high volume/ mix application environment. We chose stand alone routing machines for our facility . I'm interested in your input for better ideas

Re: Big SMEMA Troubles :-(

Electronics Forum | Tue Nov 03 22:11:38 EST 1998 | phillip hunter

| SMTnetters: | | My UIC conveyors aren't working with my: | | �Omniflow 7 Reflow (Mfg 1/95) | �Dek 265 GS | �Philips CSM | | | What can I do? Does anyone have experience with connecting UIC or other conveyors to the above equipment? On the refl

Re: Wave Solder Fixtures: Biting the dust FAST!

Electronics Forum | Mon Sep 14 17:39:37 EDT 1998 | Steve A

| I am running composite fixtures on my wave solder machine and after about 500 passes each (1 month)they are showing serious signs of wear in that the composite surface is bubbling up and glass fibers are also starting to show. | The problem here

Re: Wave Solder Fixtures: Biting the dust FAST!

Electronics Forum | Tue Sep 15 07:54:42 EDT 1998 | Rob Fischer

| | I am running composite fixtures on my wave solder machine and after about 500 passes each (1 month)they are showing serious signs of wear in that the composite surface is bubbling up and glass fibers are also starting to show. | | The problem h

Re: BGA Shorting problem

Electronics Forum | Tue Sep 01 10:16:10 EDT 1998 | Mike Cox

| | We are experiencing shorting on a BGA. The part has a 1mm pitch with a 196 I/O count. The problem seems to pop up without warning & disappear in the same manner. | | Our pad design is .020" diameter pads with .025" solder resist diameter. Th


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