24869 used results

Electronics Forum: used (Page 1931 of 2487)

Re: Which SMD placement machines are easiest to use?

Electronics Forum | Wed Jan 26 10:15:04 EST 2000 | Christopher Lampron

Maurice, I have worked with several different platforms of P&P machines and have a couple of thoughts regarding features and ease of use. The Contact Systems 3 series machines are versitile and very user friendly. I contribute this to the touch scree

Re: PTH Crystal Spacer

Electronics Forum | Thu Jan 20 12:32:40 EST 2000 | Dave F

Hey Dreamguy: On stand-offs: * "Sugar" stand-offs look nice, after washing (if you wash, as Chad said), but we find them kinda fragile. The only people that can install 'em without bustin' more than they install are the "skill people" that we don

Re: Via-in-pad

Electronics Forum | Tue Jan 25 13:15:17 EST 2000 | Michael Allen

Thanks for the input Mike (and others). As you guessed, via-in-pad is not my idea, and I'm resisting it as much as I can. One of our designers used this practice at some other company, says there were no problems, and wants to use it (via-in-pad) a

Re: coating with no-clean?

Electronics Forum | Thu Jan 13 15:19:51 EST 2000 | Dave F

Hey Jack: It's certainly "do-able." Conformal coating adhesion testing was done as part of the "Evaluation of Low Residue Soldering for Military and Commercial Applications: A Report from the Low Residue Soldering Task Force," published by Sandia Na

Re: Screen Printer Visual Inspection Equipment

Electronics Forum | Fri Dec 17 16:25:05 EST 1999 | Brian W.

I used an off-line paste height measurement device to control my paste process. I did not inspect every board, just a random sample once an hour. I have used both manual and automatic devices. I like the automatic becuase: 1 - I have no "operat

Re: Wave soldering smt components

Electronics Forum | Fri Dec 17 03:38:53 EST 1999 | cklau

Hello Guys; I "ll like to add some comment on Mr John message , see below.. "Be sure that the components to be used on the bottom can take the maximum heat of the wave and the delta T of entering the wave."-John The required preheat temp , that i

Re: Soldering long lead thru hole parts

Electronics Forum | Thu Dec 09 23:57:41 EST 1999 | Jeff Sanchez

Mike, A drag solder system is not so bad. If it's not discoloring the silk screen , damaging your parts or blistering your boards than it looks like a safe bet. I am not sure what other components you have on the boards besides the LED's? But the

Re: White Residue

Electronics Forum | Fri Dec 10 08:44:52 EST 1999 | Dave F

Vinesh: You�ll find no papers that "clearly describes the harmful effects" of your style "of white residues," because no one is crazy enough to brag that they are doing what your customer wants you to do. The residue of no-clean fluxes are designe

Re: Noclean soldering to gold

Electronics Forum | Mon Dec 06 03:54:57 EST 1999 | Chris May

Hi Russ, I have a similar situation. I have been told that this can be caused by the nickel, over which the gold is plated, can result in suspect joints, embrittlement etc. Some joints can even be weak and broken without much force on some of my boa

Re: Noclean soldering to gold

Electronics Forum | Mon Dec 06 05:18:53 EST 1999 | Wolfgang Busko

Hi Russ, assuming that only your flux changed and the PCB-finish stayed the same it seems to me that the solderability of that finish is somehow poor. About Ni/Au it can be said that the solderconnection is made between Ni and Sn. The Au-finish is ju

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