Electronics Forum: leaded (Page 591 of 789)

solder paste solvent

Electronics Forum | Wed Jan 30 17:23:07 EST 2013 | dyoungquist

In response to hegemon... This is not a recommended practice but..... We have added a few drops of water soluble flux to our water soluble solder paste when the paste is on the stencil. This was after the paste had "dried" out a bit. We have had

AOI False Calls

Electronics Forum | Wed Feb 20 18:04:56 EST 2013 | hegemon

You should have a number of lighting options to deal with the low contrast lettering. Low angle, B/W, reverse color. etc... If I am reading you right, you might have your bridge inspector too far out on the lead banks, that it is seeing the silkscree

Bridging from wave under smds such as 8-MSOP-EP, 20-LFCSP-VQ

Electronics Forum | Fri Feb 22 18:36:36 EST 2013 | austinpeterman

Has anyone experienced bridging on topside (solder destination side) surface mount devices after wave soldering? We x-rayed 100% of the placements after smt re-flow with no issues. When the same placements were x-rayed after the tht wave solder pro

Quad 4c Sequence lead inspection electrical test qa...

Electronics Forum | Mon Mar 11 04:57:31 EDT 2013 | bobpan

You really should edit your programs in central controller where it is much easier to follow the commands shown and to follow the extent data to see whats attached to each part/pickup. The hht can quickly cause issues when the wrong button is presse

Quad 4c Sequence lead inspection electrical test qa...

Electronics Forum | Tue Mar 12 05:01:09 EDT 2013 | bobpan

The only thing that makes sense is a problem with the program you are working on. Can you edit another program and will it save? You are seeing the same thing happen when you use the machine as and editor or central controller....this makes no sense

Quad 4c Sequence lead inspection electrical test qa...

Electronics Forum | Tue Mar 12 09:23:52 EDT 2013 | bobpan

If you edit the sequence on the hht.....to fix your problems...you then have to upload the data to central controller. If you are not doing this....you are overwriting the data on the machine with bad data everytime you download to the machine. The l

Quad 4c Sequence lead inspection electrical test qa...

Electronics Forum | Tue Mar 12 09:24:47 EDT 2013 | bobpan

If you edit the sequence on the hht.....to fix your problems...you then have to upload the data to central controller. If you are not doing this....you are overwriting the data on the machine with bad data everytime you download to the machine. The l

reflow oven advice

Electronics Forum | Thu Mar 21 16:45:31 EDT 2013 | dyoungquist

We have been using a Heller 1707EXL (7 zones + 1 cooldown zone) for lead free (ROHS) soldering since 2007 with good results. I wouldn't go any lower than 7 heat zones though. If I may brag a bit....The IPC-7095 revision C standard was released a fe

Tons of shorts on Combo process

Electronics Forum | Mon Mar 25 10:22:20 EDT 2013 | rgduval

You mentioned that you changed the layout some, and this can be essential in this type of process. If the SMT parts and TH leads have inadequate spacing on the bottom side, shorts may be inevitable (someone else will have to advise what the recommen

Does an AOI System need angled cameras

Electronics Forum | Mon Oct 07 22:06:43 EDT 2013 | action_101

I successfully inspect solder on plcc's with angled cameras on the yestech we have. In the past I have successfully inspected for solder with angled cameras on mirtec machines for both plcc's and qfn's. Other than inspecting solder on those two types


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