Electronics Forum | Sat Dec 18 08:23:33 EST 2010 | remullis
I experienced warpage on a 7'x 13" long board, unfortunately my oven does not have center support. I use stiffeners on both of the short ends. It fixed my problem. Some of the things I was experiencing with the warpage on the second pass were placem
Electronics Forum | Sat Aug 21 12:18:46 EDT 1999 | M Cox
| | IF anyone is placing 0402's with the Mydata tp-18 I would like to here how reliable it is(with these little buggers). | | | | | | | | | Thanks | | | | | | MD Cox | | | | | I've been placing them with a TP9-2U. You need to buy a new tip and a
Electronics Forum | Thu May 20 16:22:07 EDT 2010 | remullis
I just got word from my board designer that the actual pad size is 11.8 mil and he is reducing the paste layer to 7.8 mil. To me this is way to much of a reduction. I am was accustomed to doing 20% reduction on any thing 20mil pitch or less. The scre
Electronics Forum | Thu Jul 05 16:19:49 EDT 2012 | jorge_quijano
The PCB has 9 QFNs, distributed arround the whole board, but the ones in the edges are the ones with the problem. My stencil is 0.005" (I use to have a 0.006"), yesterday I realize after talking to my vendor that the stencil is manufactured in 2 step
Electronics Forum | Wed Oct 19 17:39:51 EDT 2022 | rgduval
The Agilis feeders are much more reliable than the old TM feeders. You can tweak the TMs a little bit, but, it can be a pain. Agilis have better repeatability, and built in y axis correction for 0402 and smaller parts. On the newer machines (My se
Electronics Forum | Sat Aug 21 09:42:31 EDT 1999 | Wayne S.
| | IF anyone is placing 0402's with the Mydata tp-18 I would like to here how reliable it is(with these little buggers). | | | | | | Thanks | | | | MD Cox | | | I've been placing them with a TP9-2U. You need to buy a new tip and a new feeder to
Electronics Forum | Mon Aug 23 21:10:47 EDT 1999 | Dave F
| | | | | | | | IF anyone is placing 0402's with the Mydata tp-18 I would like to here how reliable it is(with these little buggers). | | | | | | | | | Thanks | | | | | | MD Cox | | | | | I've been placing them with a TP9-2U. You need t
Electronics Forum | Fri Oct 06 10:19:21 EDT 2000 | JAX
Head, There are no rules on what is placed by machine. Some things to look at: 1. vision alignment issues a. board size ( FOV ) 2. Machine pick-up a. special nozzle b. off center pick-up (depending on machine this could cause a problem) 3. Re
Electronics Forum | Tue Mar 09 22:20:16 EST 2004 | Ken
Is this a PBGA? If yes. run a flat steel rule or edge across the top of the PBGA. Is it flat or cupped? Is this a TBGA (super bga). I have seen issues with a suppliers heat spreader design that actually will deflect the corners down and raise the
Electronics Forum | Tue Apr 26 15:57:59 EDT 2022 | proceng1
I didn't look into the two pad layouts and what they look like, but here is what I tell my operators. When the solder goes to liquidous, the surface tension will pull on the part from each pad, essentially centering the part. Assuming that the pads
