Electronics Forum | Fri Jan 06 15:13:04 EST 2006 | jdumont
We have owned a 3Z for about 4 years now and an AV for a couple. What is your question...
Electronics Forum | Fri Jan 06 19:57:19 EST 2006 | abhinavajmera
What would be the most suitable expression for ratio of Volume of Alloy to Volume of Paste for a solder paste? For example if we use 63Sn/37Pb alloy with a 90 Wt% metal what would be an appopriate expression for the Volume Ratio?
Electronics Forum | Fri Jan 06 23:06:15 EST 2006 | sumxp
Many article talk about SAC in wave soldering. Is there any possibility that eventually SAC in wave going to replace with SN100C? Anybody ever use SN100C in automotive,RFID product?
Electronics Forum | Sat Jan 07 06:32:04 EST 2006 | mskler
Can anybody suggest that how we can chek quality for soldering of chip capacitor & chip resistor. we are getting prob. of dry solder in chip components. All Replies should be highly appriciated.
Electronics Forum | Mon Jan 09 16:47:45 EST 2006 | slthomas
Perhaps I read your question wrong, but I would be more inclined to look for changes in your solder paste, your screen printing process, and your reflow profiles if you're suddenly having problems with more than one component.
Electronics Forum | Wed Jan 11 10:38:30 EST 2006 | Rob
We've got a Must II, and it works fine. The service in the UK is good too, but the upgrades (i.e. to lead free) are expensive, and last time we checked the new software wasn't 100% ready.
Electronics Forum | Mon Jan 09 07:56:49 EST 2006 | slthomas
Squeegee pressure or height, snap off, the age and/or condition of the paste and the condition/cleanliness of the stencil are about all I can come up with, unless you got a new stencil and you changed the design parameters or they made it wrong.
Electronics Forum | Mon Jan 09 08:25:30 EST 2006 | grantp
Hi, If the stencil was not cleaned well from the previous run, dried paste residue can cause the paste to grab in the stencil. If you have a microscope, check the small apertures for contamination. Regards, Grant
Electronics Forum | Mon Jan 09 11:26:08 EST 2006 | abhinavajmera
Dear Grant, Thank you for the reply. It is really a valid reason and I did check for it but nothing turned out that way. Can you think of some other reasons if the process parameters are the same used earlier when there was no problem at all. Regard
Electronics Forum | Mon Jan 09 13:41:09 EST 2006 | slthomas
Take a look at the boards, too. Could the HASL be different (in particular a domed or convex cross section) than what you're used to seeing? Is your printer actually working properly?
.gif)
