Electronics Forum | Mon Sep 03 16:51:58 EDT 2001 | edmentzer
We have stored PCB's in the refrigerator twice when our old pick and place died during production. One time the boards were in the frig for two days. I put the boards in a tray and covered the tray with plastic food wrap. We waited about two hours
Electronics Forum | Mon Sep 17 16:03:13 EDT 2001 | jschake
The results from an experiment comparing 27 different combinations of pad dimensions concluded that the pad design with 15 mil pad length, 12 mil pad width, and 9 mil pad separation produced the best assembly yields. A 5 mil thick laser cut stencil
Electronics Forum | Wed Sep 26 16:32:40 EDT 2001 | davef
Placing a component the correct side up: * May affect heat dissipation. [Umm, that sounds like stretch, but who knows what designers think about?] * Allows reading the markings on those components that have markings, however cryptic the notation of
Electronics Forum | Thu Sep 27 10:28:29 EDT 2001 | John S
It seems to depend on your situation. We're an OEM manufacturer and run the same products for extended periods of time. We monitor process indicators such as Dave listed, but we also monitor process defect trends. This is product specific of cours
Electronics Forum | Thu Nov 01 17:35:04 EST 2001 | davef
A couple of things: * Don�t do it. Securing both the plastic case and the lead to prevent breaking the case seal is very difficult to do while you reform the lead. Just resell the parts and buy the correct parts. * If you will not listen and insist
Electronics Forum | Tue Dec 11 19:41:28 EST 2001 | lsjp
Hi there, I am a bit late in answering the question about removing (and probably replacing) those d&%&$Z3 Mictors. Are they straddle mount or vertical? How many segments? What's the configuration of the board (PCB thickness, adjacent components, part
Electronics Forum | Tue Dec 04 13:23:05 EST 2001 | fmonette
Hi Steve, It sounds like your product will have many moisture-sensitive devices on both sides. You should be aware of the additional controls that are required to insure the reliability of these components in a double-side reflow application. The
Electronics Forum | Thu Dec 13 20:54:23 EST 2001 | davef
There is neither �nominal thickness� nor �is there a set maximum� for via masking. We use some of our vias as test pads. So, as you�d expect, we get rabid when we get mask bleed onto these pads. IPC-6012 - Qualification & Performance For Rigid Pri
Electronics Forum | Fri Dec 28 16:42:04 EST 2001 | johnthor
While we have nowhere near the volume you do we have bent 2 A-14s in 3 years. One was definitely operator error in that a tape holder arm was left floating the other is unknown as this particular (ex)operator wouldn't admit to knowing the time of da
Electronics Forum | Wed Jan 02 12:15:44 EST 2002 | pteerink
Don't waste your money on T&R feeders for large parts. I used to have an old TP9 and we ran tons of products with vibe tubes and odd shaped parts. Used to cut our own tubes for parts and jimmy-rig parts like crazy to make them all fit on the machine
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