Electronics Forum | Thu Jun 07 03:54:16 EDT 2007 | testbloke
I currently have issues with "slivers" of solder on or behind QFP devices. This has only occured on PB Free boards (we currently produce PB and PB Free on same equipment). This is not tin slivers, this is a long thin sliver of solder measuring up to
Electronics Forum | Mon Jun 11 10:40:46 EDT 2007 | ramseyn
Jim, Another good resource would be Asymtek (www.asymtek.com) I have had a lot of luck with their dispense equipment for underfilling applications. They have run tests in the past using various methods for our company to determine what type of epoxy
Electronics Forum | Fri Jun 08 17:22:51 EDT 2007 | naynayno
We have been producing an IMS assembly with SMT dpak's for some time. However, we recently encountered a new problem by chance - the parts can be flicked off with a finger nail. I state by chance because the solder joints are wetted and shiny with
Electronics Forum | Fri Jun 15 08:47:18 EDT 2007 | ed_faranda
I by all means, am not an expert on Wave processes. But, our second bottom side zone for our wave is down. My boss said "well the flux looks okay, just run it" and won't give me the machine to properly fix. How many people have a problem with thi
Electronics Forum | Mon Jun 18 11:54:35 EDT 2007 | grantp
Hi, The problem seemed to be across multiple batches of boards, so I think they were made correctly, and we don't use a carrier in the reflow oven. However we just moved our equipment to the new factory yesterday, and connect and start turning on
Electronics Forum | Fri Jun 22 01:51:41 EDT 2007 | jmelson
&F(27).NO4=0 NO4 is for the prep head, which you probably don't have. So, it is zero to mean don't use the prep head. &F(27).DSPF=1 This is the "display flag", it apparently means this component slot in the file contains valid data for a real compon
Electronics Forum | Mon Jun 25 10:08:17 EDT 2007 | slthomas
I don't know much about Hellers other than the 1500 models which don't have blower speed adjustments (except for cooling), but with that much air flow I'd be worried about over working your heater elements. Have you checked in zone setups to see ho
Electronics Forum | Mon Jun 25 19:36:36 EDT 2007 | bga_kid
If you calculate CFM using the numbers you have provided you are pulling 1396CFM out of the oven. I am not sure what Hellers spec is but I know a Speedline OmniExcel Air machine should be set at 300CFM. I do know for a fact that to much exhaust can s
Electronics Forum | Fri Jun 22 11:09:01 EDT 2007 | realchunks
Sup G! Normally when spray fluxers get neglected, the spray pattern is the first thing affected. To actually 'see' this, we cut out a piece of cardboard the same size and length of the board. Run it over the fluxer and then turn itover and look at
Electronics Forum | Mon Jun 25 10:42:43 EDT 2007 | fredc
On our new shop we used iron pipe in the walls and attic and copper ever where else that can be easily accessed. I saw a pvc material at a trade show years ago that was rated for air lines. With their demo material they could fold it and drive nails
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