Electronics Forum | Thu Dec 15 20:57:53 EST 2005 | Ooi
What u meant by change every 1.5 day ( Expose to enviroment 1.5 day) ?
Electronics Forum | Mon Dec 19 07:29:30 EST 2005 | jax
Tg is just a way to say when the board goes limp... or a quick way to rank laminates... who cares. For lead free you want to look at Td, Decomposition Temperatures. ( Temp at which the material weight changes by 5% )
Electronics Forum | Fri May 19 13:40:36 EDT 2006 | grantp
Hi, Sorry to drag this thread up again, but we were recommended to change the wave to SAC305, but is everyone recommending SN100C? That seems to be the feeling on this thread. What flux is used? Regards, Grant
Electronics Forum | Mon Jan 09 16:47:45 EST 2006 | slthomas
Perhaps I read your question wrong, but I would be more inclined to look for changes in your solder paste, your screen printing process, and your reflow profiles if you're suddenly having problems with more than one component.
Electronics Forum | Mon Jan 09 07:56:49 EST 2006 | slthomas
Squeegee pressure or height, snap off, the age and/or condition of the paste and the condition/cleanliness of the stencil are about all I can come up with, unless you got a new stencil and you changed the design parameters or they made it wrong.
Electronics Forum | Wed Jan 18 16:50:04 EST 2006 | slthomas
Don't know why it would....the available oxygen shouldn't change any. You could always use nitrogen if you were worried about that. ;)
Electronics Forum | Thu Jan 19 07:06:37 EST 2006 | aj
St17 and 19. One thing you could do is to swap heads and see if it is related to a certain head. Also, I have changed faulty amplifiers in the past so make sure you are getting the signal at the end of each fibre optic cable. aj
Electronics Forum | Thu Feb 09 09:45:50 EST 2006 | PWH
I'm not familiar with the HVN70 programming but our conceptronic oven reacts well to adjusting the cooling fan speed at the end of the oven. However, TAL will likely be affected substantially by changing fan speed.
Electronics Forum | Wed Feb 15 06:29:05 EST 2006 | Chunks
Send it out to someone who can make sure. Gerber readers are hard to make changes with, which is their design. Send it out. Most places will charge @ $100 US.
Electronics Forum | Fri Feb 24 15:47:12 EST 2006 | Chunks
No doubt. Now a days component mfgers have just changed their plating for no lead, but dare not post the max temps for their product which are at the edge of destruction. Kinda like the surface mount batteries that can't take the reflow temps.
