Electronics Forum | Tue Oct 20 03:22:52 EDT 1998 | Viswanath Valluri
Hello : Some of the recent FBGA (a Chip Scale Package) packages that I am looking into have body sizes having aspect ratio's 2:1. In particular, body sizes of 14x8mm, 15x8 mm etc. The ball count for this particular package is around 40-68 I/Os. My qu
Electronics Forum | Fri Oct 23 15:19:38 EDT 1998 | Dave f
| Hello : | Some of the recent FBGA (a Chip Scale Package) packages that I am looking into have body sizes having aspect ratio's 2:1. In particular, body sizes of 14x8mm, 15x8 mm etc. The ball count for this particular package is around 40-68 I/Os. M
Electronics Forum | Tue Oct 20 11:37:38 EDT 1998 | Stefan Witte
All SM machines pick components with a vacuum nozzle. Most likely the component is picked in the geometric center, which may not be the center of gravity ( SOT 23, SO 89 ). Any other pick position than the center may be taught upon requirement, but y
Electronics Forum | Sat Feb 17 14:21:54 EST 2007 | Muhammad Haris
Hi All, I am using YV100Xg YAMAHA Pick and Place Mounter Machine and I am facing a tilting problem of PLCC 84 and QFP 240 pins ICs. I deeply checked about their vision files and place them on the double sided tape and found them ACCURATE on their pad
Electronics Forum | Wed Feb 21 14:52:36 EST 2007 | wavemasterlarry
Put a wieght on it.
Electronics Forum | Mon Feb 19 07:31:43 EST 2007 | jax
Check the nozzle. If these are the only two parts on the board that use a specific nozzle, it's a good place to start. The nozzle is probably not releasing well and shifting the component when trying to retract after placement...
Electronics Forum | Mon Feb 19 08:38:05 EST 2007 | realchunks
Are your pads on the board aligned correctly? I've seen this a lot lately. Pads on opposite sides are not aligned correctly. This causes the part to twist. If you have the Gerber and a way to check it, it's worth the 3 minutes to check.
Electronics Forum | Tue Feb 20 23:46:38 EST 2007 | Muhammad Haris
hi Jax the nozzle which i am using for these components are also used for large SOPs and other components so i cant blame my nozzles.The problem is, they always shift to some 5 degree plus but some times it place them accurately.
Electronics Forum | Tue Feb 20 18:04:53 EST 2007 | coop
I am not familiar with the YV100XG pick & place but you might want to increase the mount height of these components The double stick tape isn't as thick solder paste. it might be pushing the component too far down causing it to twist. I encountered
Electronics Forum | Tue Mar 26 23:26:35 EST 2002 | ianchan
Hi Guys, (Note: We are not talking about bill-board RES/CAP, we are talking about Z-axis slant/tilted RES/CAP with respect to the PCB pad Z-axis plane). 1) We ref through the IPC-A-610C specification "bible", and can not find a "chapter/verse" tha
