Electronics Forum: sided (Page 306 of 507)

Strange things ocuring during reflow...

Electronics Forum | Fri Feb 19 20:45:07 EST 2010 | dcell_1t

Nice one the baseball glove trick, but my boss wasn't in the mood for that (it wasn't even funny to him...) anyhow convection turbines were checked on the oven and they found that the bearings on the motor was too loose, then 2 motors were replaced,

Solder cover

Electronics Forum | Fri Mar 05 02:59:59 EST 2010 | grahamcooper22

Hi, Do you have a picture on one of these leads where the solder has covered the lead ? As this is a gull wing device I wouldn't expect solder to cover it. I expect to see a toe fillet / wetting around the sides of the lead and a heel fillet. If your

Tape/Reel Counter

Electronics Forum | Fri Mar 19 12:53:35 EDT 2010 | pcbrookie

Hello everyone. I'm looking for some general information on reel counters. We are trying to tighten our inventory counts, and rather than estimate a reel we're looking into getting an accurate count via a reel counter. So first, I'm wondering what

Top camera inspection and side camera

Electronics Forum | Fri Apr 02 14:11:21 EDT 2010 | bigdaddysoy9

Manjunath, I prefer orthogonal systems. In my experience they are actually better at detecting coplanarity and HIP defects than multi camera systems. They are obviously limited, in that they can not inspect a component under another component, b

Excessive dwell time in solder fountain

Electronics Forum | Mon May 03 11:20:43 EDT 2010 | mikesewell

A good guideline is keep it similar to your wave solder process, for example 2-3 sec. This assumes you're preheating the assembly. While polyimide boards are fairly robust at some point you will begin to see copper dissolution - the solder side pad

BGA Voids

Electronics Forum | Fri May 21 15:45:29 EDT 2010 | pforister

iv40, Thanks. The PCB that we are populating the BGA hybrid onto does not have holes in the vias. I think the manufacturer indicated that on their hybrid it has holes in pads. This hybrid is a PCB assembly with BGAs and other components populated

SM-421

Electronics Forum | Thu May 27 11:21:03 EDT 2010 | jdumont

Hello Fonsi, we have been using a 421 for a couple of years now (one of the first customers in North America). The hardware is fantastic. No issues, camera and lighting system are great. Initially we did have some small software bugs but Samsung w

100nF 0805 ceramic cap with 25 Ohm resistance? Why?

Electronics Forum | Fri Jun 25 00:16:11 EDT 2010 | leadthree

I got a report from Yageo yesterday with microsections and and and..... result: Cracks I did a test run on boards after ICT, but before coating. They are all ok. Seems the cracking happens somewhere after the ICT. But at that stage all assembly is a

PCB Warp Issues

Electronics Forum | Fri Jul 23 02:54:47 EDT 2010 | wizzkid

I think that it can be solved by placing ths into a baking oven with the set point above the PCB Tg. For this process to be succesful, weights need to loaded onto the PCB stack during the heating cycles. Once the cycle is complete, the PCB stack will

SUNSDA Board loader

Electronics Forum | Wed Sep 01 14:45:57 EDT 2010 | mmccance

Has anyone had any experience with SANSDA? We have a board loader that was bought used with no documentation. We have tried to contact them requesting schematics or a SMEMA manual to no avail. The loader is not completing the circuit telling the d


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