Electronics Forum: 6

Aspect Ratio Calculation

Electronics Forum | Tue May 30 07:41:21 EDT 2006 | davef

Aspect ratio: The ratio of a via�s length or depth to its pre-plated diameter. So, in your case, either * 6=0.093/x, calculating x=0.093/6=0.016 as the smallest via hole diameter. ... OR * 6=y/0.01, calculating y=6*0.01=0.06 as the maximum board th

Cpk Variables Control for Paste Printing

Electronics Forum | Thu Apr 04 16:38:51 EST 2002 | davef

Equipment companies like to talk about �accuracy� and �repeatability�. These measures provide limited information. Flaws of the measure aside, some printer companies have begun to report Cp. * DEK ELA: Cp = 1.33 @ �0.025mm * DEK 265: Cp = 1.6 @ �0.0

Stencil Design

Electronics Forum | Wed Jun 03 22:07:41 EDT 2009 | davef

= 0.66 aperture opening to the stencil wall has been shown to provide the best transfer efficiency and repeatability of the deposited paste. Values from 0.66 to 0.8 insure a good paste release from the stencil. The biggest impact on area ratio is the

screen thickness

Electronics Forum | Mon Jan 23 22:53:31 EST 2012 | davef

= 0.66 aperture opening to the stencil wall has been shown to provide the best transfer efficiency and repeatability of the deposited paste. Values from 0.66 to 0.8 insure a good paste release from the stencil. The biggest impact on area ratio is the

High Quality Polyimide PCB manufacturer

Electronics Forum | Thu Apr 09 09:42:12 EDT 2015 | fzpd2000

I am looking for high quality polyimide PCB manufacturer. I have seen a few with the labels: NIX-6-0 Anyone knows who makes these boards? Or other good polyimide PCB builders? Any comments are greatly appreciated. F.Z.

Need gold fingers (edge contacts) widened in eagle then saved to Gerber.

Electronics Forum | Mon Sep 04 10:49:59 EDT 2017 | sarason

In Eagle 6.0 and later you can edit the XML directly it should be fairly trivial. Then download the Eagle free package from the CADoft website to view and it should be okay regards sarason

PCB Prototyping SSB / DSB

Electronics Forum | Fri Jul 01 04:15:58 EDT 2005 | pci

Hello I am looking for a best solution to make a prototype of Single sided and double sided board. Using Orcad. The line / track width are 8/8 mil. the hole sizes are 0.6 0.8 , 1.2 and 2.6 mm. The size will be approx. 175 x 130mm. Could you please

limitation's of the QSA 30 machines

Electronics Forum | Wed Dec 07 11:58:36 EST 2005 | derengmao

Could you help to tell what is the way to pick/place 0402/0201 using QSA30? Also do you know that without a VME bus Control B/D (illumination card for fixed camera), the new version software (ver.6.0 and above) will not initialize the vision system.

Re: Fluxes

Electronics Forum | Thu Mar 23 00:37:47 EST 2000 | Donnie DeYoung

Thanks guys. We are currently using an Opti Flux fixed spray head at 10 to 20 psi. We were using the 351 flux at 60 psi before this, so as you can see we found that there's a huge difference here. We are currently running a conveyor speed at 5.0 FPM.

limitation's of the QSA 30 machines

Electronics Forum | Wed Dec 07 12:56:27 EST 2005 | bobpan

If you are referring to having the control knob on the head for the lighting or controlling it through the software... then...version 6.0 works for both. Make sure you go into scp.ini and turn on\off light control. For 0402 parts......you must have

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