Electronics Forum: donut (Page 1 of 3)

Fiducial Shapes---

Electronics Forum | Fri Dec 13 18:35:48 EST 2002 | successmani

Thank you friends for your discussion Regarding the reason behind using Solid disk or donut fiducials.Still I am understanding clearly the reson behind using Solid disk or donut fiducial shape. In all the above discussions we had we did not discuss a

HASL surface finish

Electronics Forum | Tue Jun 16 14:35:13 EDT 2020 | dwl

for the fiducials, try a donut shape instead of a disc. The HASL solder seems to settle more evenly on a donut than it does on a dic.

Immersion Silver Reliability / Peelable mask

Electronics Forum | Sun May 30 09:35:27 EDT 2004 | davef

Sure, I'd expect your PCB fab has given you a information sheet on handling, storage, and whatnot, including recommended temporary solder masks. The cats & kitties in the stockroom are the first people to start your search. It's probably squirreled

Re: Fiducials

Electronics Forum | Mon Feb 22 14:02:17 EST 1999 | Michael Allen

We have resorted to adding a ring (or donut) around our 0.040" round fiducials. The donut acts as a "plating thief" to minimize the thickness of the copper plating (in the case of HASL finish) and of the solder plating (in the case of solder-plated

Fiducial Shapes---

Electronics Forum | Thu Dec 12 19:37:35 EST 2002 | successmani

I would like to know the reason behind using soild disks and donut shapes as the most commonly used fiducial shapes in the Industry.Why not use square shape or diamond shapes fiducial and many more instead of circular shape or solid disks. Thank you

Fiducial Shapes---

Electronics Forum | Thu Dec 12 19:38:42 EST 2002 | successmani

I would like to know the reason behind using soild disks and donut shapes as the most commonly used fiducial shapes in the Industry.Why not use square shape or diamond shapes fiducial and many more instead of circular shape or solid disks. Thank you

LSM Cable

Electronics Forum | Sat Dec 06 23:59:57 EST 2003 | Dean

If this is an LSM1 or LSM 2 I have both of these. I can check the cables if you like and email you a wire diagram. I would bet dollars-to-donuts that it is a standard 25 pin parallel cable. Let me know if your interested.

Multitronics 2000 SX

Electronics Forum | Fri Apr 30 10:46:27 EDT 2004 | bpeay

Greetings all, Forget Tyco for any help but try SMS Technologies in England. These fine folk might be able to help, and they make a heck of a jelly filled donut.

Stringed Washable Beads?

Electronics Forum | Thu Apr 08 16:36:26 EDT 2004 | davef

Please send us a box of donuts, so that we don't feel so used, and we'll continue to bail you out of these perilous situations.

Immersion Silver Reliability / Peelable mask

Electronics Forum | Sun May 30 01:17:02 EDT 2004 | johnwnz

Hmm, the type of thing you'd expect the PCB vendor to warn you about or test prior to changing their process!.. fun & games. So are they good donuts?

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