Electronics Forum | Thu Aug 27 12:34:05 EDT 2009 | dpeebles
We have an inline MPM 25 HiE with 2D inspection. We are needing to put in a 2nd line. We have ordered another identical used stencil printer but are wondering if we should upgrade to a newer machine with 3D inspection, automated paste, etc. Will
Electronics Forum | Tue Sep 22 08:35:47 EDT 2009 | cman
Did you try pre-tinning your board on this suspect pad/s to see if it improved wetting/solderability prior to printing/SMT placement and reflow? Does the pad/s not soldering tie to a ground layer? I would connect a T/C to each pad of the same part an
Electronics Forum | Thu Oct 22 03:24:39 EDT 2009 | shinseimy
Base on my PCB experience, the contamination issue might caused by PCB finishing or SMT process (like oven or printing). Before go further, maybe you can check few things. How many PCB affected per lot?? it might be caused by humidity (storage or pac
Electronics Forum | Tue Nov 03 16:55:48 EST 2009 | tstrat
If the contamination came from the SMT process I would have expected it to be present in the joint above the finish. It is isolated to the EN layer in the ENIG finish. We are doing more analysis to determine the number of boards with the contaminatio
Electronics Forum | Wed Sep 23 10:48:39 EDT 2009 | scottp
I did see ESD issues years ago when we tried using a plastic stencil to print SMT glue. We measured a huge charge on boards indexed out of the printer. I tried ionizing fans but that didn't help. We now only use metal stencils for printing adhesiv
Electronics Forum | Tue Sep 22 22:28:30 EDT 2009 | sbayeta
I think I forgot to mention a little detail here: our boards go through automatic insertion before entering the smt train. We use old machines (universal radial 3 and radial 5), so clinching is not perfect. Do you still think glue printing is a good
Electronics Forum | Thu Oct 08 08:15:39 EDT 2009 | kpm135
We've used both 1A33 urethane and 1B31 acrylic coating on our SMT assemblies with great success for many many years. This is with components of all shapes and sizes including a 9 ball micro-BGA. We apply the coating in every way imaginable and we hav
Electronics Forum | Mon Oct 12 09:16:17 EDT 2009 | fredc
Martin, 2 of my customers use inventory management systems. One refers to their system as tigers. This may be a system they developed for themselves. I am not sure what the acronym stands for. The other refered to their system as kanban. It is named
Electronics Forum | Wed Nov 25 14:37:13 EST 2009 | ccouture
We use a FREE maintenance management software called Maintenance Assistant http://www.maintenanceassistant.com/ Take a look, we have over 50 machines and all the expendable parts are in the database. scheduled maintenance, work orders etc... pretty
Electronics Forum | Thu Oct 29 12:45:34 EDT 2009 | europesmt
Probably the machine service key is in on position. Put back to left side. This results in the machine speed is very low and the machine can operate with covers open. Key is located by the hour counter or on the hand held keyboard. Hope this will s
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