Electronics Forum: thread (Page 4220 of 7892)

Pitted / Stretched Appearance on Fine Pitch Components.

Electronics Forum | Tue Jul 27 15:15:48 EDT 2004 | JSTARKEY

We have recently encountered a problem that we haven't seen before: The solder joint appears to be wetting ok and the solder is re-flowing but the appearance of the solder after re-flow is pitted. Using Kester 531, humidity around 41% temperature aro

Liquid flux dispensing

Electronics Forum | Wed Jul 28 11:47:16 EDT 2004 | GCronin

I am looking for a consistent method of applying no clean liquid flux to solder pads. My main concern is if I use a standard air-over type dispenser mounted to an automated arm that the liquid flux will make a mess and not be consistent. I'm not to

Circuitry

Electronics Forum | Wed Aug 04 23:12:37 EDT 2004 | dougt

To get you started: You would begin with a comparitor, one input would be referenced to a voltage that you want the output to "trip" at. The second input would be where you apply your "voltage" that you are using to start the motor. The output of

SMT Machines

Electronics Forum | Tue Aug 03 03:27:35 EDT 2004 | kent_peterson

You have alot of advantages staying with the Samsung. The CP60 is a great machine. With the removable carts for setting up in advance giving quick change over. Very good price and better service for you than we get here. Their parts teach on these is

SMT Machines

Electronics Forum | Thu Aug 05 13:46:56 EDT 2004 | mdm4ua

I don't know what the availability is in your area but You might want to look into Mydata. The machines are not as fast as some but very versatile and have faster changover than any of the machines that I have seen. PS. I work for a contract manuf

BGA ziff socket rework

Electronics Forum | Fri Jul 30 03:33:07 EDT 2004 | tuner73

Is anyone out there reworking the AMP BGA ziff sockets? AMP's recommendation is that it cannot be reworked. I have successfully reworked the 604 ball version of this socket, but I am having problems with the 603 ball version. I am using an Air-Vac

Depaneling tolerace check

Electronics Forum | Fri Jul 30 11:32:31 EDT 2004 | westred

I am looking for a fool-proof way to have operators measure PCB's out of the depaneler to ensure that the tolerances for the outside edges are being met. Probably a spot check system to make sure the process is in tolerance. So far building a "GO"

what's the difference between a thru vias and a blind via?

Electronics Forum | Mon Aug 02 13:46:10 EDT 2004 | Bob R.

Via in pad lets your layout guy run traces on inner layers so there's more more area available on the outer layers for placing parts, test point, etc. There are also electrical advantages due to shortening paths, but I'm just a simple mechanical eng

RFID PCB

Electronics Forum | Fri Jul 30 16:28:27 EDT 2004 | crios

I was just told by a visitor (PCB Experts) at our company that RFID PCBs should not be built using a no clean solder flux process due to possible reliability issues. This really got my boss going and asked me to look into this. This is the first time

Softbeam - soldering balling in feedtube

Electronics Forum | Sat Jul 31 08:52:15 EDT 2004 | g2garyg2

I am soldering with a softbeam laser and often get a flux/solder build up at the end of the feed tube. Seems better when we use Senju wire but this is very costly. It seems like we have tried everything to resolve this. Would appreciate assistance on


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