Electronics Forum | Tue Dec 15 15:45:50 EST 1998 | Chrys
| Okay here is the deal. I am fairly new to the company here, but one thing I have noticed is that we read way to many fiducials, in my opinon anyway. One for example is this. One assembly was reading 17 fids. Smallest pitch was .25mil I say you
Electronics Forum | Wed Jun 09 15:03:53 EDT 1999 | Earl Moon
| In past PCB designs I have cleared all traces from all layers | (except pwr/gnd) from fiducial area. It has come to my attention that this is only necessary on the side where fud is placed. Which is the correct method of design using a fidicial?
Electronics Forum | Thu Apr 19 10:59:05 EDT 2007 | peteb
Greetings, Is there a Mil Spec or IPC spec on how many times you can wave solder a PCB? I did a search on this forum with no results. Common sense says two or three times. I need documentation.Thanks for any info.
Electronics Forum | Thu Apr 19 11:45:34 EDT 2007 | Cal
Hi PeteB... I dont think you will find any Specs...but that I do not know. What I do know is it depends on the make up of your PCB and Components. Obvious haveing components that may be sensitive to heat the less you want to run or pass through. Re
Electronics Forum | Fri Jul 23 12:47:20 EDT 1999 | Bill Schreiber
Dear Earl, At Smart Sonic, we have seen fiducial deterioration as a result of the epoxy not being water-safe. Unfortunately, many stencil manufacturers believe their customers are still cleaning with solvents and therefore use an epoxy that is solve
Electronics Forum | Tue Jul 27 17:12:11 EDT 1999 | Earl Moon
| Dear Earl, | At Smart Sonic, we have seen fiducial deterioration as a result of the epoxy not being water-safe. Unfortunately, many stencil manufacturers believe their customers are still cleaning with solvents and therefore use an epoxy that is s
Electronics Forum | Tue Apr 27 16:42:18 EDT 2010 | m79d
Hi jepoy + a very frazzled man thanks for your suggestions,here is how it went:- I found a couple of these VM1710 boards and tried one and still nothing. I really wanted to see if power was getting to the camera and anything coming out. I was loo
Electronics Forum | Fri Nov 25 15:52:40 EST 2011 | davef
"IPC-2221 - Generic Standard On Printed Board Design" talks to fiducials. Anther take on fiducials says they shall meet the following requirements. * Make fiducials 1 - 1.5 mm diameter circle. * Cover fiducials with tin. * Keep solder mask opening at
Electronics Forum | Fri Dec 02 16:26:00 EST 2011 | davef
Here's some recommendations from various companies: * http://www.sibex.com/pcbguidelines.pdf * http://www.carltonindustriesonline.com/Docs/Fiducial.doc * http://www.tracktronics.com.au/pdf/PicknPlace_Fiducials.pdf * http://microtronix.co.za/pcb_re
Electronics Forum | Wed Nov 23 10:34:39 EST 2011 | ahamid
What is the Industry standard for number of fiducials on PCB. Is it just 2,3 or 4 for good placement.Any reference to IPC or any other standards to support your suggestion.
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