Electronics Forum | Mon Jun 26 12:53:41 EDT 2000 | Michael Parker
I belive I once saw a picture of a Delta-T. It was in a very old Popular Science magazine. Some yahoo from Ohio wanted to put wings on his ol' tin lizzy. He also had some elaborate plans to convert his flat head V-8 to run off corn likker. I say chuc
Electronics Forum | Wed Jun 26 10:36:24 EDT 2002 | Steve L
Thanks for all of your valuable inputs. The paste we are useing is PWS0111Ae36 (Alpha MEtal), peak temp from 210 to 225 C. The paste was on the floor about 3 weeks. ianchan, when you mentioned "no more than 6 hrs in the stencil", you mean no more t
Electronics Forum | Wed Sep 11 16:57:04 EDT 2002 | bigwop
I've seen this problem caused by the cool down. > On a 7 zone oven I made a profile to peak at zone > 5 to give some semblance of control to the cool > down. The component can develope a big delta T, > because of the difference of materials Che
Electronics Forum | Thu Feb 03 12:21:15 EST 2005 | Chunks
Lets get to the simple things. Wave or Reflow? Wave soldered parts have a higher susceptibility to physical damage until they are waved. That�s were I normally see this type of break. Usually, the crack is a circular pattern in the cap if it�s fr
Electronics Forum | Tue Sep 20 04:28:31 EDT 2005 | Rob
Pyramax 150 is a low cost newer version of the Paragon 150, the Paragon is a newer version of the VIP. The VIP is great for lead free (as confirmed to us by BTU, who told us it was pointless upgrading that particular oven to a Pyramax). You may nee
Electronics Forum | Tue Nov 22 10:12:13 EST 2005 | stepheniii
Have you complained yet to MuRata? You are talking about the same bluetooth module, aren't you. I hope everybody having trouble with module complains to them. I don't believe they put all the cautions and warnings about reducing the deltaT on the da
Electronics Forum | Tue May 23 09:53:05 EDT 2006 | stepheniii
Make sure your reflow profiles are the best you can make them. You will probably want to, at the very least, get some sample BGA's and boards to sacrifice to profiling. Drill a small hole through the board into a middle ball of the BGA. Also put a t
Electronics Forum | Fri Dec 15 14:22:22 EST 2006 | realchunks
Sure. Treat it like wave solder. Top side wetting is generaly harder to achieve than wave so don't over look it. On most selective solder machine, the delta-T is also something to look out for. Most move from preheat to pot. And snce the pot por
Electronics Forum | Wed Dec 26 15:45:17 EST 2007 | ck_the_flip
Amen to that!! Too many people lately trying to "get out" of rolling their GD sleeves, attaching thermocouples to the board (using their own preferred method), and running the board and profiler through the oven. I'm sick of questions like "duh, pb
Electronics Forum | Mon Aug 04 12:29:12 EDT 2008 | realchunks
If you are getting top side wetting, I doubt if this is a Delta-T problem. It also could be there is a lot of flux on the top side of the board stuck between the connector and the board. This is easily checked by fluxing and not running th eZ axi
