Electronics Forum | Wed Oct 24 08:20:03 EDT 2007 | hussman
Actually, it applies to conditions from cold to hot AND hot to cold. The measure of T is graphed against time. Time is what you measure the difference of temperature against. I was hoping to influence this engineer to find this out on his own, but
Electronics Forum | Mon Feb 04 08:47:10 EST 2008 | cokedigits
QEs. You gotta love them. They live in a fantasy world of charts, graphs, and meaningless statistics. In most companies, they're part of the problem....and not the solution.
Electronics Forum | Wed Mar 19 12:33:16 EDT 2008 | patrickbruneel
You can follow the daily metal prices here: http://www.lme.co.uk/tin_graphs.asp Tin is on its way to $21/Lb. Was $5.00/Lb. before RoHS I forgot the benefits of lead-free can anyone refresh my mind?
Electronics Forum | Fri May 09 12:58:34 EDT 2008 | aisart
I would recommend you take a look at JBC if you are looking for a "good" soldering iron to work with lead free solder. Find the attached comparative graphs and before anybody asks. Yes, I am affiliated with JBC.
Electronics Forum | Wed Dec 13 14:17:26 EST 2017 | emeto
For the ovens you run the profiler and you compare graphs. For the AOI you should run these golden boards(boards that you keep for AOI test - might have intentionally implemented defects) once in a while and make sure you are getting the same results
Electronics Forum | Wed Jul 13 14:50:29 EDT 2005 | rameshn
Dear Sir, We are manufacturing Computer Motherboards & Networking products (which are having 2 to 3 BGA Chips onboard) in our plant. we are having 2 nos of HELLER 1800W model Reflow Ovens. this model reflow oven is having 9 heating zones at both top
Electronics Forum | Thu Oct 29 14:54:26 EDT 2020 | emeto
The best way to measure is by money made(quality product and minimal rework). I worked for a company that asked me to achieve building 100 boards/week for an assembly. A year later they were unhappy that we don't hit 150 boards/day of the same board
Electronics Forum | Fri Aug 11 17:21:43 EDT 2000 | Dave F
John: Sorry I'm tardy getting back to you on this Heat capacity = [applied voltage in volts*applied current in amps*(time ending in seconds - time start in seconds)]/(�K ending - �K start) The units of heat capacity are joules per mole-degree when
Electronics Forum | Wed Dec 10 14:37:47 EST 1997 | Frank Murch
There is a direct relationship between adhesive strength and surface area. If you graph this it will be linear. The amount of the adhesive should be about 2/3 the gap between the pads. Pad designs change all over so a true and tried rule does not ex
Electronics Forum | Mon Sep 10 16:07:37 EDT 2001 | johnw
Hi guys HELP!!!!!!!!!! I have been tasked with working out a chart to show calibration acCuracy and that my machines are in control I say to myself I know they are cause I have no misplacement of fine pitch but this is not good enough for my co
