Electronics Forum | Tue Mar 04 15:54:20 EST 2003 | msivigny
You're welcome John, it can get confusing but what's important is that machine's exhibit accuracy AND repeatability. Generally, high Cp values represent high repeatability (for instance in darts: hitting a triple 20 over and over means you're very re
Electronics Forum | Fri Mar 07 12:27:04 EST 2003 | msivigny
Hello Doug, thank you for the additional commentary, it has reminded me of another reflow recommendation that I'd like to make in general for readers. It's not specific to O2/N2 in ovens but in the method for creating and managing profiles for numero
Electronics Forum | Mon May 26 08:02:11 EDT 2003 | davef
Resistance: Tables of wire gauge often provide a resistance measure of some kind for each gauge. That way we can estimate the resistance of any length of wire we might be interested in. Calculating trace resistance is only slightly more complicated.
Electronics Forum | Mon May 10 09:30:35 EDT 2004 | davef
Q1: What are the basic requirements of thermal profiling? A1: Not sure what you�re looking for here, but when doing a profile, you�re trying to measure the temperature at specific points of the board, as the board moves through the oven. Q2: How we
Electronics Forum | Fri Sep 24 11:08:13 EDT 2004 | davef
We're not sure what you mean by temperature sensitive components. From an assembly process stand-point, every component we use is temperature sensitive to one level or another. More specifically, some of our products use polyphenylene sulfide (PPS)
Electronics Forum | Thu Apr 28 14:07:24 EDT 2005 | bschreiber
Hello Paul, Prior to 1980, I would say that your concerns were real regarding the resonant frequency. However, since then all major ultrasonic cleaner manufacturers use a "sweep" frequency technology. By "sweeping" or alternating the frequency bet
Electronics Forum | Sat Dec 17 08:07:06 EST 2005 | grantp
Hi, What worries me is that a lot of people speak about what they have heard, but there is no firm facts on exactly what the situation is. I did a seminar on lead free a while ago, and was told that going lead free on the components while running l
Electronics Forum | Fri Jan 27 16:58:24 EST 2006 | solderman
Hi Ams, I often cringe when I read replys like the ones you got. I will give 'chris' the benefit of the doubt in that he is sincere in his response. However, there are people posting here with agendas to sell specific equipment. Without knowing
Electronics Forum | Wed Apr 26 12:38:33 EDT 2006 | TMC
I would suggest you do the following: get a sample / scrap board that you will be reflowing, attach thermocouples at various locations on the board, send the board to APS or whomever. Ask them to run a profile based on your solder pastes manufactur
Electronics Forum | Tue Dec 26 22:18:20 EST 2006 | davef
Common methods to replate components are: * Barrel plating http://www.finishing.com/Library/zemo/barrel.html * Hot solder dipping - MIL-F-14072 M258 Certainly you can do this yourself by dipping the component leads into a solder pot containing lead
