Electronics Forum | Fri Jul 13 04:58:01 EDT 2007 | pavel_murtishev
Good afternoon, Heating/Cooling rates contribute to warpage most of all. Try to tweak you profile so that heating/cooling rate would be minimized. Try to switch cooling blowers off maintaining required peak/TAL. Check copper balance for this PWB, by
Electronics Forum | Fri Jul 13 17:01:50 EDT 2007 | sean10
Thanks for your inputs. The board construction seams to be balanced and boards comes back to flat after top side process. we'll be performing experiement variing the profile parameters. if that does not do it, any printing suggestings? Would more sq
Electronics Forum | Fri Apr 16 14:32:50 EDT 2010 | flipit
Who is financially is good shape. Are any of these companies destined to be sold to someone else? I have good feeling about some of these but others I have concerns with. 1)Universal 2)Juki 3)Mydata 4)Siemens 5)Panasonic 6)Fuji 7)Samsung
Electronics Forum | Wed Jun 02 19:54:04 EDT 2010 | davef
Here's one take on what you seem to be asking: * After a point, more solder is more stress than the proper amount of solder would produce. * Asymmetrical amounts of solder produce more stress than balanced amounts of solder would produce.
Electronics Forum | Fri May 06 08:47:05 EDT 2016 | davef
You're correct. This design will have a record amount of 0402 rework for tombstoning and misalignments. Suggest that the pads on each end of all components be the same size in order to balance wetting forces during reflow.
Electronics Forum | Tue Jul 30 06:21:00 EDT 2019 | spoiltforchoice
Well, so far Heller certainly scores highly on the balance of price, features & brand reputation (Never heard anyone be mean about them). Be interesting to see what the "cheaper" brands offer, so far they're a bit sleepy.