Electronics Forum | Mon Oct 15 16:56:18 EDT 2001 | davef
First, I�d like to kiss-up to the people that are likely to be responding to this question. Thank you for contributing to my recent query about placement program control. OK. Let�s talk about �good practices� in placement programming. Throw in an
Electronics Forum | Thu Nov 01 10:10:49 EST 2001 | caldon
DAVE- Sorry for the late response.... as I was outta da country fer a bit. Wolfgang has a great point...If your machine has linear scales or encoders and they are dirty (even a spec of dust) this could have a huge impact on the positional data (esp.
Electronics Forum | Thu Oct 18 11:20:21 EDT 2001 | davef
Ooooo, you do have the toys, baybeee!!!! This really is not a good situation. * Leaving this OA flux res on your boards will surely affect the LT performance of your product. * That a rookie found this by noticing solder balls all over the seconda
Electronics Forum | Wed Oct 24 18:10:56 EDT 2001 | davef
We attended several presentations on AOI machines at a recent SMTA meeting. The presenters gave a section about process verification. They bantied about numbers. [I want to say 350 DPMO, but we glaze over when it gets to that stuff] So, you might
Electronics Forum | Wed Oct 24 14:06:37 EDT 2001 | mparker
If you let your design team leave things up to chance, chances are something will go wrong. You are right to want to take control rather than be lead down an undesirable path by the fab house. Various masks serve certain desirable purposes. You need
Electronics Forum | Mon Nov 12 16:14:47 EST 2001 | davef
Yes!!! How can we assemble boards with 20 pitch when we allow 0.008� error to the master art? Excellent question!!! IPC-D-300G has nothing to do with assembler requirements. It is written by and for fabricators, so that they can be comfortable.
Electronics Forum | Mon Nov 19 20:15:39 EST 2001 | davef
Now, that is one thickass board!!! The rant first: If our �board supplier changed our board surface finish on� anything without our approval, the board supplier would be an �X�. Life has enough surprises. And of all the flat finishes available, h
Electronics Forum | Fri Nov 30 17:33:12 EST 2001 | slthomas
After saying for years that we'd never do two-sided assembly, the powers that be are not only saying we will, but they're threatening to throw an out of house design at us...no frame (it's a PCI card with a couple of dinky breakaway tabs), no tooling
Electronics Forum | Tue Dec 11 04:43:35 EST 2001 | maubrey
I am the director of a performance/art group who work with electroacoustic clothing. Esssentially we perform with electronic clothes that make sounds by react with/to the environment. Please take a look mat our web site (complete wi
Electronics Forum | Fri Dec 14 13:58:07 EST 2001 | slthomas
This is one I haven't seen before (not in this context, anyway). We have an assembly that we have the SMT done out of house on, because of the high volumes. The boards have two distinct characteristics with respect to the appearance of the solder jo
