Electronics Forum | Fri Jul 21 13:15:58 EDT 2006 | russ
it is one of three things: 1. tape and reel done improperly from second source tape and reel op. doubt if OEM would or could do this. 2. Program is wrong in machine,or part data is bad and part is noted as nonpolarized, maybe and the machine then h
Electronics Forum | Mon Jul 29 18:51:47 EDT 2002 | davef
Consider: * Printing: errors [ie, insufficient, excess, skipping, etc.] paste doesn�t roll in front of squeegee, paste adheres to squeegee at the end of stroke, paste does not release. * Component placement: orientation, wrong component, missing comp
Electronics Forum | Fri Jul 21 16:05:09 EDT 2006 | davef
Sometimes distributors endup with partial reels of componnts and are not able to sell the quantities of the partial lengths. So, they gather all the odd strips and have a contractor combine into a more attractive length reel for resale.
Electronics Forum | Thu Jul 30 16:50:41 EDT 2015 | lokit
In our production line we use the pick and placer My100 by Mycronics. We get a lot of feedback from quality department about IC's being placed upside down, wrong polarity. (Wrong polarity usually already delivered to us, or IC's placed in the sticks
Electronics Forum | Thu Sep 23 23:34:47 EDT 1999 | JAX
| Is there a standard rule/guide for the orientation of pcb's in a panel for panelised board (specially for routed panel). | i often get this question from peeps here and i kept telling them that it depends on how it affects the process. | thanks and
Electronics Forum | Thu Jan 24 20:00:24 EST 2002 | davef
If solder touches gold, you should see solder, rather than gold. Since you see gold, something is wrong. * Is the solder touching the gold? If not, why not? * If the solder is touching the gold, but the gold is not soldering, there is a problem w
Electronics Forum | Mon Jul 14 10:42:47 EDT 2008 | ck_the_flip
Patrick...I'll give you a couple of examples. Wave Soldering, the Science: you're getting solder shorts and you slow your belt speed down just a bit knowing that this effectively lowers your contact length and improves your peel-back for that tou
Electronics Forum | Mon Aug 23 03:12:57 EDT 2010 | grahamcooper22
Possible route causes of bridging on fine pitch ICs are; too much paste (stencil aperture wrong), poor print quality (paste smudges during printing), pcb pads not flat depending on the solderable coating, paste has poor cold slump properties, too muc
Electronics Forum | Tue Jun 15 11:20:34 EDT 2004 | Vic
Hi Guys, Can you give me a good bird's eye view in Verifying First Off via ICT Test. We currently verify our first off via naked eye for just the solder joint quality, orientation of parts etc. Aside from open and shorts, what can ICT verify? how c
Electronics Forum | Mon Aug 13 09:49:35 EDT 2012 | rjlatz
I just got back from a visit to our PCBA manufacturer. We have good flowthrough on the PTH, but solder skips and bridges on the SMT SO IC's. We have correct orientation and robber pads, but the results are still the same. I noticed the wave shape is
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