Electronics Forum: after (Page 467 of 658)

LASER SOLDERING

Electronics Forum | Wed Apr 19 10:23:47 EDT 2006 | George

If you are not OEM I would evaluate a chosen laser machine carefully. If possible, go and run some PCB's yourself at the manufacture's place before you jump into conclusions. If your work orders are small and very different, it might take a while for

CP4 of death

Electronics Forum | Sat Apr 15 19:11:53 EDT 2006 | daxman

If I've been clear, the parts become offset as the XY table moves around, without fiducial correction. It's when it does a fiducial correction that the placement is alright. If the placement is excellent, and I just zip the table around...load posit

Masking of PWBs prior to conformal coat

Electronics Forum | Wed Apr 19 16:43:05 EDT 2006 | samir

Silicone-based coatings "repel" most foreign,non-compatible materials like peelable solder mask, and rubber or vinyl boots. The result is, uncured material around the vicinity of where the boot was. Trust me. Been there and done that. As a rookie

Screen printing warped boards

Electronics Forum | Thu Apr 20 13:55:31 EDT 2006 | cyber_wolf

Here is the problem : We have 2 AP25 printers with dedicated tooling. After we run side one boards through reflow, we get some warpage in our boards occasionally.(Sometimes we get a lot of warp depending on the geometries of the substrate) When the

Tip life of soldering irons with lead-free (SAC305)

Electronics Forum | Tue May 02 12:07:26 EDT 2006 | Sheldon Stewart (Process Engineer)

I am curious if everyone else is seeing the same dramatically reduced tip life with lead-free that I am? We have purchased new irones with controlled temperatures up to 800F. We are doing more hand soldering on our lead-free at the present while wait

Carbon Ink vs Immersion Gold for key pads.

Electronics Forum | Wed May 03 15:00:44 EDT 2006 | patrickbruneel

It all depends on process, design and environment in which the contacts are used. Both have excellent conductivity characteristics Both don't oxidize over time On the other hand gold is much softer then carbon, and after hitting that contact a gazil

Issues with No Clean Resdue??

Electronics Forum | Thu May 11 15:11:14 EDT 2006 | patrickbruneel

I assume you talk about wave soldering. No-clean fluxes are widely used since 1987 or earlier and after all these years they have proven to be reliable. If you clean the board or not the dust bunnies etc. will still reach the board surface. If you us

Changing a wave over to lead free

Electronics Forum | Thu May 18 03:36:38 EDT 2006 | Grant

Hi, We are about to change our wave over to lead free solder, and it's a Soltec Deltawave, which uses about 750 KG of solder. Our supplier is recommending we change the bath over, however that seems a bit extreme. They are concerned we won't get ri

Farewell to All!

Electronics Forum | Sat May 20 09:54:43 EDT 2006 | smartasp

Hi Guys What a wonderfull bunch we are. Overstressed by the senior management at HQ dreaming up some new benchmarks, processes we don't fully understand and to top it up a wife bitching at you for spending to much time with the brand new smt line yo

SMT optimization and improvement

Electronics Forum | Wed May 31 22:17:24 EDT 2006 | EC

Hi Jack, I do not know what type of machine you are using and how old is your machine. But I have this problem before using Fuji machine. There are few things cause part throw.....placment speed, feeder, pick up tolerance, part dimension tolerance,


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