Electronics Forum | Wed Apr 13 04:09:15 EDT 2005 | simmcircuits
Hi, I need help with our MPM UP2000, the stencil and the lamp boards won't turn off completely, they are both on at the same time. Turning it on would only make it brighter, turning it off will just lose the brightness but the lamps are still on. I h
Electronics Forum | Tue May 17 10:11:54 EDT 2005 | russ
I would use a foam fluxer since spraying rosin will make the stickiest nastiest mess you can imagine. 18 layer board huh? You will want convection preheat, both top and bottom preheaters, preheat tunnel of at least 4-5', a chip wave, laminar flow w
Electronics Forum | Tue May 24 08:54:02 EDT 2005 | stepheniii
I have experience with Mirtec, and overall I think it actually performed better than advertised. Although I have to point AFAIK all AOI machines are operator dependant. I was working at a company with around 8 runs a day, and such variety and ECO's
Electronics Forum | Fri Jun 03 09:00:06 EDT 2005 | russ
How many times have you found that your oven was performing differently? this will give you the answer on frequency. We have a dedicated board and profile that we use to verify the oven operation. We perform this every 3 mos. and I believe that th
Electronics Forum | Tue Aug 02 23:02:04 EDT 2005 | crishan
Assuming it is not PCB supplier related, here are my thoughts; 1. CHK Component density top / bottom, I am assuming you do bottom reflow first then top. If have alot of heavy comps on bottom it might cause the board to sag in the middle. 2. You hav
Electronics Forum | Thu Aug 25 09:09:41 EDT 2005 | stepheniii
I did a search for "DFM" and most of the posts were from the previous century. Is there a tool that is not too expensive that will check a board layout based on DFM criteria? I don't think there could be a good one to give the number of parts and spa
Electronics Forum | Tue Oct 18 04:44:44 EDT 2005 | dougs
these are two separate things, your MSA is measurement systems analysis, moving a machine won't change the way you measure your machines performance so you don't need to do MSA again. you should check machine capability once a machine is moved thoug
Electronics Forum | Fri Nov 25 00:07:23 EST 2005 | pyramus
Nope actually the whole bluetooth component is a raw part comprising of BGA and chip components in one small PCB wherein this whole assembly is encased in a shield. So basically when we recieve the part we can only see the shield and some minor chi
Electronics Forum | Wed Dec 14 07:38:56 EST 2005 | tk380514
the original question was: Please give me some guidelines on designing Stencils for Fine Pitch. which i did however, 40% fallout for solder shorts this could be caused by many other processes having gone wrong before, i.e. type of solder paste
Electronics Forum | Thu Dec 15 02:09:22 EST 2005 | tk380514
SNAGGLETOOTH HOLDS HIS HANDS UP, HAVING JUST REACHED THE EDGE OF HIS OWN IGNORNACE. I just read up on black pads - http://www.emsnow.com/npps/story.cfm?ID=9784 when i checked the joints under the microscope they were a light grey slightly discolou
