Electronics Forum: glasses (Page 9 of 57)

Safety Glasses

Electronics Forum | Thu Apr 10 12:19:19 EDT 2008 | realchunks

Frazz, Why did this get instituted in the first place? Perhaps instead of making a knee jerk reaction, your company could keep the "dangerous" areas safe with safety glasses. Like around wave or moving machinery and such. You know, put some thoug

FR4 or CEM3

Electronics Forum | Fri Jun 04 01:13:31 EDT 2010 | boardhouse

Hi fotis, Big difference between Cem3 & FR4 is that FR4 the glass is woven and Cem3 is sheet glass non-woven. for Multi layer product, i would not consider Cem3 due to increase chance of de-lam due to lack of weave for strength. Cem1 and Cem3 are

Re: Misalignment Issue (CAD Vs. Machine Variables

Electronics Forum | Tue Nov 14 03:00:14 EST 2000 | sarry

I have one suggestion why don't you align all parts and take a close look at it if you can find any misaligned component after that. IF SO, that's machine's repeatibility problem.(or mechenical problem-dirty nozzle, wrong pick up and placement height

Capability study of a turret head component mounter

Electronics Forum | Fri Sep 22 07:35:37 EDT 2000 | Henrik Eklund

Hello everyone out there, I have been working in the SMT process for a couple o years now, and now I'm partly responsible for the turret head component mounting process. We are about to buy new equipment and I want to do a capability study of this m

Re: CPk

Electronics Forum | Mon Dec 06 14:56:49 EST 1999 | Russ

The best way that I have found to calculate CPk for placement machines is to buy the kit that is usually provided by the manufacturer of machine. It usually consists of a glass plate and glass components that are scaled. You simply program the mach

T sub G

Electronics Forum | Tue Aug 25 16:28:11 EDT 1998 | Al Knudson

Hello, Our PWB supplier has requested that a change in the laminate material to reduce the incidence of pad lifting. The standard laminate materials (Polyclad PCL-FR-226 with a glass transition temperature of 135 C) have greater z-axis thermal expan

Re: Cpk measurement

Electronics Forum | Thu Jun 18 21:19:17 EDT 1998 | Dave F

| I am currently using some pick & place equipment and would like to measure their cpk using a glass plate and glass "components" with vernier scales. I have seen these kits but am trying to track a supplier down in UK/Europe. | Any help is much appr

CMMs (Coordinate Measuring Machines)

Electronics Forum | Tue May 07 17:24:43 EDT 2002 | stefwitt

Most machine supplier have CMM's and proove their accuracy with attached protocol of CPK. We used to have a machine from View Engineering. I can not locate their website, I only found a used machine. http://www.equiptechonline.com/PDetail.cfm?pid=17

Dye Pry test

Electronics Forum | Wed Oct 23 15:33:38 EDT 2002 | Randy V.

Dye penetrant is a liguid that will wick through very small cracks. I used over 10 years ago for checking cracks in glass feedthru's in hermetic packages. You put the dye on one side of the seal and developer (white) on the other side and the red dye

Reflow of SMT Glue / Adhesives

Electronics Forum | Tue Jun 17 09:22:02 EDT 2003 | davef

Higher that recommended is more brittle. Look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=17906 Q2: Will some of my Ceramic Caps crack during the wave soldering process because of the heat? A2: Probably Q3: Can you see any pos

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