Electronics Forum: 2006 (Page 311 of 649)

Dewetting on Second side reflow?????

Electronics Forum | Tue Oct 31 13:22:51 EST 2006 | realchunks

Are you using Houdini brand paste? It really depends on the part and pad size, but I kinda doubt that you�re paste is disappearing during the 2nd reflow. Do a side by side comparison of first pass versus second pass reflow and show your operator.

Dewetting on Second side reflow?????

Electronics Forum | Tue Oct 31 13:32:16 EST 2006 | bobsavenger

yeah, that's what I've explained to them is that it is not going to disappear. Currently they are in the process of running this PCB again and I'm going to do the side by side comparison. Thanks for the input.

Dewetting on Second side reflow?????

Electronics Forum | Tue Oct 31 22:56:23 EST 2006 | davef

So at incoming inspection, what are the results for your "dip & look" solderability testing [IPC/JEDEC J-STD-002A] of the specific problem component?

Cleaning Paste from 2nd Side Print

Electronics Forum | Tue Oct 31 13:31:36 EST 2006 | John S.

We've just started running a lot of double sided assemblies. What is the preferred method for removing paste from a board that is populated on side 1 if the side 2 print is poor? Thanks John S.

Cleaning Paste from 2nd Side Print

Electronics Forum | Tue Oct 31 16:30:32 EST 2006 | John S.

SnPb No-Clean. We've done it on bare boards with alcohol and an ultrasonic bath, but that seems very agressive on a half populated board. Thanks John S.

Cleaning Paste from 2nd Side Print

Electronics Forum | Tue Oct 31 22:16:53 EST 2006 | davef

John S.: IPA is dangerous choice. Look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=43133

MPM Spare Parts

Electronics Forum | Wed Nov 01 08:26:15 EST 2006 | jdengler

I don't know for sure who would have these but would start by asking the used equipment guys that advertise on this forum. Jerry

MPM Spare Parts

Electronics Forum | Wed Nov 01 13:43:13 EST 2006 | ppminc

We stock millions of dollars of spare parts for MPM screen printers, you can view all the spares on our website: http://www.goppm.com/MPM/Spares/Low_Res/Miscellaneous/mpm_spares.htm Best regards, Sharon sharon@goppm.com

MPM Spare Parts

Electronics Forum | Sun Nov 05 22:54:03 EST 2006 | KEN

Check with sigmaprint. They are the origional designer and have an upgrade package. The reason that piece is so expensive is it is a one piece machined stainless steel foil that is 0.010 inch thick. http://www.sigmaprint.co.uk/spares.htm

Panasonic Orange Reflectors

Electronics Forum | Tue Oct 31 23:46:12 EST 2006 | fastek

Which nozzles are coming up NG on the large camera? If it's the smaller ones, don't worry about it. Those nozzles don't use the large camera anyways. Be concerned if the small nozzles are coming out NG on the small camera.


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