Electronics Forum | Fri Feb 02 10:24:50 EST 2007 | FredC
Daxman, Have you eliminated nozzle variation? The difference between a new and used CP6 nozzle can be .15mm. On a CP4 I would think it could be more. On new Cp4 nozzles the difference in effective nozzle length should not be more than .04mm. You can
Electronics Forum | Mon Feb 05 10:21:21 EST 2007 | davef
Thermal conductivity [W/m-�C] * Silver: 418 * Aluminum: 403 * Copper [rolled annealed]: 392 * Copper [electrodeposited]: 392 * Gold: 297 * Nickel: 90.7 * Tin: 73 * SAC: 73 * Castin: 57 * Pb37Sn63: 51 * Lead: 35 * Epoxy, phenolic: 25-75 * Conformal co
Electronics Forum | Wed Feb 07 10:36:33 EST 2007 | mk
Wow JAX. Way off buddy, I promise!!!! This is real as have all my posts. As an officer of the SMTA Atlanta Chapter for the second term, I am familiar with the Forum Etiquette.. Thanks for defending our site's honor JAX. I don't like people who ab
Electronics Forum | Tue Feb 20 06:05:10 EST 2007 | mk
Thanks to all for the info. The ideas to correct the situation are all excellent and if we see any more boards from this source with this condition we will know what to do now. In the end however, the real questions we are trying to answer are, 1.I
Electronics Forum | Thu Feb 08 17:10:18 EST 2007 | slthomas
I thought we were already registered? No? Shows how long I remember stuff. Providing a confirmation link to the site in an email to the new registree seems like it might provide some security and deterrent to low-life spammers as well. Over and abov
Electronics Forum | Mon Feb 12 10:03:34 EST 2007 | slthomas
"(If any element�s composition is greater then is it useful/harmful to our solder paste/assembling or not?) It certainly changes the characterstics of the compound. Why you might change it depends on how you want it to behave. Be more or less ductil
Electronics Forum | Sat Feb 10 09:36:52 EST 2007 | davef
Choices are: * Run a Cp, Cpk capable profiler through the oven. * Review the results of your supplier's process qualification that would include Cp, Cpk on their oven. Handspring contract [REV. 6 - 7/1/99] with Flextronics says: [snip] 4. Process Ca
Electronics Forum | Mon Feb 12 10:06:46 EST 2007 | CK the Flip Guy
DaveF, Please define a "Cp/Cpk capable profiler." Do you mean one that has software that automatically calculates this for you? I do this at my company, and we track 2 critical variables - Time Above Liquidous and Peak Temps. and this is done on a
Electronics Forum | Sat Feb 10 20:08:25 EST 2007 | colormaker
I just started a design where I will be placeing smt parts on both side of PCB. 50 parts on top side ranging from 0602 to SOIC8 and 4 SOIC LED's on bottom. How can I assemble with parts on both sides ? I have P&P,stensil printer, relfow and solder w
Electronics Forum | Mon Feb 19 10:55:14 EST 2007 | John S.
We're looking into a new profiler and potentially one of these wave rider tools. I found some old threads, but nothing very recent. We tried the Malcolm tool a long time ago, but we weren't very happy with it. I'm sure I can get a demo unit and co
