Electronics Forum: donut (Page 2 of 3)

solder pre-forms

Electronics Forum | Wed May 29 08:43:12 EDT 2002 | zanolli

Various solder metal supplies sell pre-forms as loose individual shapes, usually donuts. The loose performs then are placed on the connector leads. If you have any volume at all, you would want to look at a �shake table� that would vibrate a batch of

Immersion Silver Reliability / Peelable mask

Electronics Forum | Wed May 26 06:59:10 EDT 2004 | davef

Some peelable solder masks attack immersion finishes. It appears components in the peelable soldermask, such as ammonia, are not very friendly to these particular surface finish. [We've wanted to investigate the effect of mask application thickness

SOT Solder Problem

Electronics Forum | Mon Sep 15 11:03:51 EDT 2008 | swag

Thanks all for the input. There are no tants. close to these parts. GSx - you are correct in that this is ROHS compliant component so maybe a plating issue. We have done what you describe but to a lesser peak with fair improvement. Not seeing muc

Re: Fiducials

Electronics Forum | Fri Feb 19 11:28:51 EST 1999 | Steve Gregory

Hi Bob, I know what you're talking about, it seems that most machines that I've worked with, have at one time or another some problem seeing a fiducial. Some machines are worse than others, and it really didn't make a difference what kind of vi

Re: Fiducials

Electronics Forum | Fri Feb 19 11:29:05 EST 1999 | Steve Gregory

Hi Bob, I know what you're talking about, it seems that most machines that I've worked with, have at one time or another some problem seeing a fiducial. Some machines are worse than others, and it really didn't make a difference what kind of vi

SMT Advantages over Thourgh Hole in Chart format

Electronics Forum | Fri May 25 18:17:56 EDT 2001 | davef

No chart for you, but I will comment that a prudent product manager would require a substantial reason to accept the risk of product failure and loss of profit to redesign his / her product. We merrily assemble many boards each month that were desig

Where's The Drill?

Electronics Forum | Fri Nov 16 14:10:01 EST 2001 | mparker

I have oftened wondered how this industry lets its workers get away from being responsible. The best way I know of is to have them buy their own tools. Just take a look at the trades - carpenters, plumbers, welders, sheet metal men, body repair, mech

Deep Fried Twinkies

Electronics Forum | Wed Sep 04 16:19:29 EDT 2002 | melo_guy

I know what you mean about the things in life that make you happy. It is just funny to me how they can always come out with something more fattening. I am perfectly healthy and have very little fat, but i worry about high blood pressure in the futu

Fiducial Shapes---

Electronics Forum | Fri Dec 13 07:49:00 EST 2002 | pteerink

I'm no math wizard, but this is my understanding Did you ever have a spirograph as a kid? Took you about 5 minutes and endless number of lines to create one circle ( and some pretty cool patterns too ). To create a square ( or diamond ) you only n

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


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