Electronics Forum | Wed Jul 29 07:06:44 EDT 2009 | patrickbruneel
Deni, This looks more like webbing and not flux residue. Webbing is caused by not enough flux to protect the surface resulting in oxide webs sticking to the board surface. The insufficient flux can be caused by: - Weak flux foam head - Air knife p
Electronics Forum | Wed Jul 29 07:45:37 EDT 2009 | patrickbruneel
Deni, When using a no-clean flux preheating is a critical parameter. If you don’t have a thermo profiler you can use inexpensive temp. labels See link http://www.coleparmer.com/catalog/product_view.asp?sku=0806822 or Google Temperature labels If i
Electronics Forum | Tue Aug 04 17:17:17 EDT 2009 | gregoryyork
Certainly does look like solder deposit across the board. Check to see if fluxing correctly. Best way is to hand flux the PCB ensuring you put plenty on. IF you still get the same result then probably down to resist absorbing the flux due to porous r
Electronics Forum | Wed Jul 29 10:46:04 EDT 2009 | babe7362000
I was wondering if anyone knows the best way to clean oxides off of fine pitch components? Apparently the paste we use does not have strong enough flux to remove the oxides off of the leads of the components. I have validated the profile and that i
Electronics Forum | Thu Aug 06 19:20:09 EDT 2009 | boloxis
easy, just dip the ICs on a very weak solution of Nitric Acid, by very weak I mean like drops of Fuming Nitric acid in a half full DI water beaker. Place the beaker on a Ultrasonic bath and dip/shake the ICs in the solution in 5~ 10 seconds only. You
Electronics Forum | Thu Jul 30 22:15:01 EDT 2009 | davef
Roland The latest update to the SMTnet Forum seems to have: * Removed graphics in existing postings. Here's an example http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=59402 * Clicking on items in SMTnet searches and links to SMTnet threa
Electronics Forum | Tue Aug 04 10:36:28 EDT 2009 | kpm135
I haven't been able to access any old forum posts. Searching gives me a selection of old posts but every time I click on one I get the following screen: Internal Server Error The server encountered an internal error or misconfiguration and was unab
Electronics Forum | Thu Jul 30 14:16:27 EDT 2009 | joeherz
We are running a selective solder machine using SN100C alloy. We have had J-STD-001 analysis performed every 2 months and our last analysis showed our nickel content at 0.104%. The max allowed is 0.100%. We changed out the pot (only 30 lbs) but I'
Electronics Forum | Fri Jul 31 09:36:17 EDT 2009 | spitkis2
Does anyone know of fully automatic pick and place machines that can pick up parts either from small pieces of cut tape (i.e. 0402's, 0603's, SOT's) or components loosely arranged on a tray (not ic's that are in matrix trays)? Application is proto
Electronics Forum | Fri Jul 31 09:48:15 EDT 2009 | dyoungquist
You can use cut tape on Mydata machines fairly easily. We are a high mix, low volume manufacturer who has to use cut tape often as that is what our EMS customers provide. It is does take more time to load/unload than a reel does so you need to fi
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