Electronics Forum: hope (Page 20 of 341)

Help for pupils

Electronics Forum | Sat Jan 31 09:59:45 EST 2004 | D Meek

Hoping somebody may be able to help recommending a source of educational video demonstrating the principles behind PCB manufacture, component pick and place and smt. Any help would be appreciated. D Meek

Printing paste through screeen mesh versus stencil

Electronics Forum | Wed Feb 04 16:54:04 EST 2004 | mk

Hopefully this is not a stupid questions but, if you are printing low tech surface mount boards, is it possible to print through a mesh screen versus a stencil? Isn't that the way it used to be done? Like soldermask only stainless steel versus polyes

Must read: The Manufacturing Coalition

Electronics Forum | Tue Feb 17 12:51:26 EST 2004 | gregp

I think your words are paraphrasing a "last stand" speech by another famous Custer. Let's hope the result is not the same.

DEK Printers

Electronics Forum | Fri Feb 27 08:44:12 EST 2004 | kauer

Looking in my DEK 265 LT manual, frame size external is 29 by 29 by 1.6 in. 26 by 26 internal, and printing to within side of frame = 75 mm.Hope this helps.

PCB wave dams

Electronics Forum | Fri Feb 27 16:02:20 EST 2004 | Zaxx

Hi Paul, One way but it slows down the process, is to get fixturing pallets made. You can usually get a universal fixture made for anywhere from $185-225USD. Hopefully this can help. Sincerely, Zack Schmad

fiducial mark

Electronics Forum | Wed Mar 03 09:03:41 EST 2004 | caldon

Chris- I use the SMEMA Standard as a reference. Goto http://www.smema.org and click the Council Standards link on the Home page. the SMEMA standard you want is 3.1 or http://www.smema.org/smema3.1.pdf Hope this Helps. Enjoy, Cal www.CTDI.com

SMT problems

Electronics Forum | Fri Mar 05 15:43:10 EST 2004 | Quetza

You can have many problems, but the most commons are that your Z belt is too Lose or is time to replace it, the second is that your Z motor went bad. Hope these woks for you

MicroFlex

Electronics Forum | Mon Mar 08 19:31:07 EST 2004 | Ken

Check out Indium Solder. They have an evaluation board "from Hell"!!! I believe they sell it for eval purposes...will supply cad data for stencil as well as pcb's for print test. I was stunned at the complexity. Hope this helps

PCB post reflow cleaning

Electronics Forum | Fri Mar 26 10:29:14 EST 2004 | jdumont

Id also like to know how this is possible. I am skeptical and would venture to say that it only looks clean but actually is not. Hopefully I am wrong and tests show there is actually no residue so we can save lots of $$$ here. Thanks

PCB post reflow cleaning

Electronics Forum | Fri Apr 02 01:05:34 EST 2004 | Grant Petty

Hi, Thanks for the info. How clean can wave soldering get? We are looking at a carrier that masks off most of the board when we run it through the wave, so hopefully this works. Regards, Grant Blackmagic Design


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