Electronics Forum | Wed Apr 25 16:35:55 EDT 2001 | Steve
Most of the time, we have very few skewed parts so I feel comfortable about the processes in general. However once in a while, often enough to throw off the first pass yield, we will get a few boards with a lot of skewed parts. By skewed I mean that
Electronics Forum | Wed Jul 25 10:27:46 EDT 2001 | nwyatt
Perhaps order a test kit from Topline or a similar dummy component vendor to practice on. That way, you can ensure that you get correct placement all over the board, and in different orientations. N
Electronics Forum | Wed Jul 25 10:29:59 EDT 2001 | nwyatt
Perhaps order a test kit from Topline or a similar dummy component vendor to practice on. That way, you can ensure that you get correct placement all over the board, and in different orientations. N
Electronics Forum | Tue Mar 14 09:37:24 EDT 2017 | soldertraining
In modern electronics, Reflow soldering is a very effective method for soldering printed circuit boards with lots of surface mount components. In some reflow ovens, the PCBs are snapped in a frame that touches the PCB only on the edges.
Electronics Forum | Wed Jul 25 09:21:44 EDT 2001 | Stefan Witte
Dave is right that this site has several leads on 0402 placements and tombstoning issues. However, I found a new method of determining the pick position. Remove a component and fill the cavity with silly putty. After attempted pick up you should see
Electronics Forum | Mon Jan 30 13:26:12 EST 2006 | Tech
Another thing to keep in mind are the vacuum hoses. The early models had a real problem with the vacuum hoses that connect to the back of the windmill. They would crack or wear through due to rubbing and cause a loss of vacuum which could cause your
Electronics Forum | Tue Apr 27 09:31:45 EDT 1999 | Robert L. McCallum
On circuit board assemblies first pass yields need to be above 98%, if a supplier is below this level it is a indication that: he has poor control of the manufacturing process; Poor component selection (price over quality; excepted a poor design from
Electronics Forum | Fri Dec 10 06:06:54 EST 1999 | Wolfgang Busko
Hi Glen, looks like flux or solder mask problem. In your first mail you said that only some boards show these symptoms and others not. First I would check on the differences between those Boards, manufactorer, solder resist, contamination. If that d
Electronics Forum | Mon Dec 06 09:28:11 EST 1999 | Dave F
Glen: So that's this metal? Is it in the area of PTH or SMT solder connections? Etc, Etc. Assuming its near connections where pasted is reflowed ... Reflow defects, bridging: misplaced components, high placement force mushrooms paste, too much p
Electronics Forum | Tue Dec 14 12:41:56 EST 1999 | Kris W
Glen, Although the previous answers probably fit the problem you are having, we recently found that during pin insertion on an Autosplice machine, the gold was flaking from the pins and lodging between the legs of surface mount components. It would
