Electronics Forum | Mon Jan 28 07:30:21 EST 2002 | cnotebaert
Is it just certain locations on the board, or is it random, does it occur on every board, does this happen on any other products you have been running? If this occurs only on the 1 board and in random locations I wouldn�t say its your wave setup. I
Electronics Forum | Wed Jan 30 17:47:22 EST 2002 | davef
Oooo, pix, coo!!! Yes, that solder connection has been beat-up. It is very �old�. So, your customer is seeing failures, correct? I can believe it. I want to say the solder in your connections doesn�t stand a chance, but lack experience in this a
Electronics Forum | Tue Feb 12 05:47:29 EST 2002 | Roy Barton
To Dave F. Thanks for your comments. I should point out that I am not well versed in SMT, I am more of a thick film and chip man. However I will look into your leads. I will try and find out more about the Quad equipment. I am very wary in getting
Electronics Forum | Fri Feb 15 00:39:09 EST 2002 | Jones
I've noticed that after we have switched to Transition Automation blades on our MPM screen printers that the stencils seem to be wearing out faster and I see a wavy rippling effect across the length of the stencil thats impacted by the squeege blade.
Electronics Forum | Fri Feb 15 08:13:18 EST 2002 | Dave G
What Snap-Off are you running ? I've seen this happen when a large negative Snap-Off is used. If you "contact" print (I.E. Zero Snap-Off) this tends to minimize the stencil coining. We use a mix of MPM & Transition Automation blades. I have noticed
Electronics Forum | Thu Feb 21 21:50:38 EST 2002 | dougk
Silly question, but, are TR blades 'exactly' the same size as MPM's and seat themselves in the holders just like MPM's? Also, different types of steel are harder (less flexable) than others. Are TR's the same? If harder (due to steel strength or coat
Electronics Forum | Fri Feb 22 00:25:46 EST 2002 | Jones
There appears to be less of a blade sticking out of the holder than the MPM set up. Thats something we noticed recently. We have our mechanical attack angle set at 0 degrees right now, but we are in the process of changing this setting by 5 degrees t
Electronics Forum | Wed Feb 20 09:38:47 EST 2002 | davef
Search the fine SMTnet Archives on � Sn62 � 62Sn � 2% Ag � 2% silver � 2Ag � etc re: "Do you have to use Tin/Lead/Silver paste only if the components are made from Tin/Lead/Silver ?" No Several points are: * Component leads with silver in the sol
Electronics Forum | Fri Mar 15 16:06:30 EST 2002 | shan
80??? Whatever leads to you to that assumption? I'd love to see a study stating that. Based on experimental results at our facility, overvolume due to the screener parameters have rarely caused a solder short. so, in conclusion, does one need a solde
Electronics Forum | Wed Mar 06 11:02:07 EST 2002 | slthomas
I worked for a medical instrument manufacturer a few years ago and we had to calibrate all measurement devices. That included everything from our vapor phase oven's thermocouples to 6 inch steel rulers. I don't see any logical justification if you'
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