Electronics Forum: pass (Page 87 of 142)

Coatings to prevent water ingress

Electronics Forum | Tue Jun 03 13:01:16 EDT 2003 | Ramanandkini

We have some experience in manual application of conformal coating using a brush that too for small circuits espceially on the soldered pads. We use Chase corporation's Humuseal 2A64. This passes high humidity tests. I am also in touch with Lackwere

Wave soldering profiling

Electronics Forum | Fri May 07 17:38:00 EDT 2004 | bruce @ knoll

I will try that next. I did speed up the wave pump motor with a larger pully(20% more speed) This was done at the time to try to increase the size of the wave because I had component leeds touching the wave pot as they passed by. Due to the wave high

Optimal Speed for Universal Chip Shooters

Electronics Forum | Tue Sep 16 09:02:16 EDT 2003 | Graeme

Murtuza You have recieved loads of good info mainly all the preventive maintenance to be done. But can I ask was all of components placed twisted or just some when machine was run at full tact time 0.12s, I ask this as I run a 4791 and if its only so

Printing On Aluminum

Electronics Forum | Wed Aug 20 18:07:13 EDT 2003 | davef

If you desire fairly uniform paste deposits, consider dispensing your solder paste. Neither a screen, nor a stencil will conform to the rough surface commonly seen in cast aluminum blocks, as you mention. Just out of curiosity: * What flux type and

Soldermask thickness

Electronics Forum | Mon Oct 06 12:37:18 EDT 2003 | ramanandkini

It was a nice discussion. What I did here was a thermal shock test 1 hour@ +90 deg.c and immediately 1 hour @ -40 deg.c. The second test I did was a high humudity test for a week. After each test, I carried out a peel test with scotch tape. Those bo


Electronics Forum | Tue Nov 04 19:34:27 EST 2003 | gregoryyork

Blimey that's a problem and a half. Water Solubles will look completely different residue wise than No Cleans, pending age and solids contents No Cleans will go white powdery - watersolubles will stay oily Alternatively process reworked PCB's through

Outgoing QC Measurements for Board Operations

Electronics Forum | Tue Oct 21 10:24:54 EDT 2003 | russ

Whoever established the PPM rates should tell you what it is covering (solder joints/assemblies) PPM is nothing more than a ratio. Determining quality levels is really up to you/company and how you want to measure your quality. This can be anything

World Class First Time Yield

Electronics Forum | Sat Dec 27 01:32:42 EST 2003 | Ian Chan

IMHO, depending on whether its a regular run model, or a properly designed/setup pilot run model, getting a mean 75%-95% First Pass Yield (FPY%) is possible as a benchmark target. This is derived from your manufacturing history capabilities, and requ


Electronics Forum | Wed Jan 21 11:02:41 EST 2004 | highfallsfunding

Hi Andreas. The SMPI is a proprietary Universal board transfer protocol. GSM platforms from about 1996 and newer have both SMEMA and SMPI. Although UIC later called it BPP1 (Board Pass Protocol) and BPP2, which is basically SMPI for lane-1 and SMP

Printing paste through screen mesh versus stencil

Electronics Forum | Thu Feb 05 19:45:33 EST 2004 | davef

Sure, here's one: Micro-Screen; 1106 S High St, South Bend, IN 46001; 574-232-4358 Fax: 574-234-7496; Cathy info@microscreen.org http://www.microscreen.org We list the following company in our notes, but have never used them: SEFAR AMERICA - MEC P

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