Electronics Forum: specification (Page 111 of 280)

Is there a medical rating and standards for PCB components

Electronics Forum | Wed Aug 07 08:49:35 EDT 2002 | davef

What do you want to be certified? So, do you have a specification control drawing for each component that defines your expected performance capabilities for use by your buyer in acquiring these parts? If there is a reason to fabricate parts to your

Shrinkage in paper phenolic pcbs

Electronics Forum | Fri Aug 23 10:28:23 EDT 2002 | davef

Ah, CHEAP boards. You pay me now, you pay me later, eh? The buyers get BIG bonuses. The production types get trashed, 'cause they can run aboard they've been doing for years. Wassup? For a specification, look to: * IPC-6011 - Generic Performance

Stencil cleaner

Electronics Forum | Wed Feb 26 13:15:52 EST 2003 | Mike Konrad

The specific answer depends on what your specific application includes. #1: What are you removing? (solder paste, adhesives) #2: What are you cleaning? (stencils, screens, misprints, pallets) #3: What type of machine are you using? (Spray-in

Cp and Cpk values

Electronics Forum | Mon Mar 03 11:06:13 EST 2003 | msivigny

Hi floydl, I completely understand when it comes to data crunching after long hours of performing measurements, it's the last and most important arduous task in obtaining performance data. If a measurement and evaluation process that traditionally to

AOI, Quality and SPC

Electronics Forum | Tue Mar 04 16:50:56 EST 2003 | msivigny

Hello Rohan, this is starting to date nearly 6 years ago but I will remember everything I can, we used a custom interface to input data and everything was stored in a very large database on a specific server only for quality data, I think we used Ora

Statistical Prerequisites For Valid Cp / Cpk Calculations

Electronics Forum | Thu Mar 06 12:15:00 EST 2003 | msivigny

Hello Dave, First you must make sure your measurement system is calibrated for accuracy, repeatability and reproducibility. We perform a standard GR&R Study on our CmController system on a regular basis to ensure that the system itself is capable to

Water Soluble for No Clean BGA Balls

Electronics Forum | Tue Apr 13 20:57:14 EDT 2004 | Mike Konrad

Hey Dreamy, Dave is correct. If you attempt to clean your water soluble (OA) flux with water only, you will turn the no-clean flux white. No inspector or end-user will accept this. If a proper cleaning system is not available to you, then I would

Tombstone caused by flux residue

Electronics Forum | Thu Jul 14 04:28:45 EDT 2005 | lloyd

Folks, Thanks for all the info and suggestions but let me add a bit more to the pot. Our products work in a harsh environment and are classed as safety critical. Customer returns are our biggest concern, we don't get very many and feeling here seem

JUKI VS. Siemens ? Which to choose?

Electronics Forum | Sat Feb 10 04:17:40 EST 2007 | Grant

Hi, I don't know about other peoples experience, but I have decided i absolutely HATE auto teach. The problem is with auto teach you just measure one component, and then you need to open up the tolerance to get an acceptable pass rate. Which means

batch aqueous cleaning equipment

Electronics Forum | Fri Apr 27 13:35:46 EDT 2007 | sjpence

I do not know of any standard recommended values for impact pressure in cleaning equipment. They act more as a guide when examining the various choices manufacturers have made for the spray flow, nozzle pressure, nozzle spray angle and other factors.


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