Electronics Forum | Thu Jun 06 16:26:36 EDT 2002 | Bob
Thanks for all the input. It is pretty much what we have checked for, microscopic analisys before printing, assembly and reflow, but like we all seem to agree one ball of solder is hard to find. The boards are full QWERTY keypads with a few LED's a
Electronics Forum | Mon Jul 14 16:26:58 EDT 2003 | slthomas
Yes, they do the cleaning, we did the (apparently first) inspection and caught the problems. They tried a shorter cleaning cycle, witnessed no defects, and attributed the defects on the boards we had to their cleaning process. Now they just plan on
Electronics Forum | Tue Nov 25 16:26:43 EST 2003 | tdurston
We are trying to establish requirements and process controls for completed, cleaned SMT assemblies. We have problems with our high impedance circuits (100 meg ohms) being affected by residue. Some boards require additional cleaning cycles to remove
Electronics Forum | Mon Apr 26 16:26:02 EDT 2004 | specialed
Does anybody know where I can get a copy of CSM Toolbox. Also a copy of the Optimizer or Digitizer. TY in advance. We just got a CSM84V and are having problems communicating with the machine {can't download files}; {CMU is not ready}. I have tried lo
Electronics Forum | Tue Dec 19 16:26:24 EST 2006 | samir
Grant, Newer lead-free fluxes have 6%-10% solids content - more activator, therefore leave more "visible" residues. Old technology tin-lead fluxes got down to as low as around the 4%-6% range (I'm going off memory, so me might be wrong)... You'll
Electronics Forum | Tue Aug 14 16:26:21 EDT 2007 | slthomas
So it's a C-n-C clearance issue? Could you go with the other cutnclinch unit...which ever you have, get the other one (one's right angled, one's offset at 45�)? Yeah, I know, they're not cheap. Other than that, hand place some of the SMT in chip bon
Electronics Forum | Thu Oct 11 16:26:40 EDT 2007 | jseagle
Have you created block offsets for each board in the panel? We have rotated baords in panels but have not had to use block fiducials, we just use board fids. We place 0402s and 16mil fine pitch on multiple boards in a panel with boards rotated 180
Electronics Forum | Thu Nov 01 16:26:49 EDT 2007 | kpm135
We have the BGA100 tool. It has its uses. Its nice to see if the balls on a BGA have collapsed and reflowed properly. At the same time though you can only see the balls around the edge of the BGA. It can also be dificult to position the device to see
Electronics Forum | Tue Feb 12 16:16:26 EST 2008 | bharath02
I am planning on starting a SMT plant to obtain local orders to start with in an developing country. I would assume a stencil printer, couple of chipshooters, couple of pick and place machine, a reflow oven, ICT and a functional tester as the startin
Electronics Forum | Mon Jul 30 16:26:45 EDT 2012 | rdouglass
Just curious if anyone else has trouble with the installation and inspection of DIMM Connectors (I know - these are through-hole parts!) We have boards with 240 pin DIMM connectors and occasionally a pin may not be properly aligned prior to press-f
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