Electronics Forum | Thu Sep 02 21:02:55 EDT 1999 | Paul Wareham
We've noticed that there are many different recommendations for pad sizes for various SMT parts. This seems to vary wildly from manufacturer to manufacturer for the same case sizes. Is there any standards that can used used to specify these sizes?
Electronics Forum | Thu Aug 21 15:50:12 EDT 2003 | davef
Couple of points are: * You're technically correct that ball height has the potential to vary by 8 thou, but we never see that much variation. Ball heights within a lot of components vary just about nil. * When we place BGA, we smush them into the p
Electronics Forum | Tue Nov 07 08:39:12 EST 2000 | Steve Geldard
Hi Guys, Ive seen your notes on Wave dwell times, we have been doing lots of test across many styles of wave machines. The most inportant thing to understand is that your dwell time does vary across the wave, it can vary as much as 2 to 5 secs from
Electronics Forum | Wed May 19 07:38:38 EDT 2004 | Cal
M.L. Feather- You may be better off using a square (rectangle) SMT pad instead of a Router hole. Since all the placement data will be referenced off the "fid" you use - placement problems could happen if Router holes are used as the router path can v
Electronics Forum | Sat Sep 29 22:56:13 EDT 2007 | asoelu
the vary results might be from following issues.. the co2 during the test the during time for this testing... the manual testing method is conductivity measurement however the bulk contamination tester like omega is resistance measurement (i remem
Electronics Forum | Sat May 29 02:26:14 EDT 2010 | vinitverma
If you want to vary the voltage to control the motor speed, then this is not the correct way. Though you can use LM317 for reducing the votage (using a 5K potentiometer) which will sure reduce the speed but it'll reduce the torque tremendously. For D
Electronics Forum | Wed Feb 13 14:15:06 EST 2019 | slthomas
I don't see any attachments.....? Are the fiducials consistently well finished (perfectly round, shiny without splotches or other imperfections), or do they vary in quality? When you do a fid offset, is the correction consistent or do you get varie
Electronics Forum | Fri Oct 27 09:10:34 EDT 2000 | jackofalltrades
We are very happy with Datum Dynamics (www.datumdynamics.com), good qualitiy and rapid turn around. They do our tooling plates, reflow pallets, selective wave pallets for a large number of varied customers.
Electronics Forum | Wed Aug 30 11:10:24 EDT 2000 | Steve Thomas
you also may find that varying the width/spacing of your breakaways affects how they run through a pass-through system, if you utilize one. They can raise he!! with conveyor sensors, throw timing off, send printers into a new cycle before the board
Electronics Forum | Sun Jul 29 09:22:54 EDT 2001 | davef
Tough to say. The residues from fluxes vary according to the suppliers' forulations. Consider: * Talking to your supplier. * Running life cycle tests.
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