Electronics Forum | Wed May 22 19:47:30 EDT 2013 | anvil1021
Also, I was just thinking that most of the large companies we work with do not consider via drain an actual void. As a matter of fact our high dollar super fantastic Xray system actually has a switch to turn off the vias during void detection so that
Electronics Forum | Fri May 31 12:50:42 EDT 2013 | spoiltforchoice
Is this a "thermal balance" issue? In the 2nd image you have a group of pads blobbed together as one giant pad. IMHO this is a bad idea, QFN's rely heavily on the magic of your paste and good PCB design to get good alignment. When your solder paste i
Electronics Forum | Mon May 20 19:24:59 EDT 2013 | hegemon
Well, you wouldn't want 100 deg difference from zone to zone, in that you would likely exceed your maximum ramp rate, for instance if Zone 1 was 90C and zone 2 was 190C. Over time a general guideline (rule of thumb) has emerged, max about 40 deg dif
Electronics Forum | Mon May 20 23:55:44 EDT 2013 | kumar_antom
Thanks to everyone for your answers... Delta T represents the maximum temperature difference between the hottest and coolest part of the assembly.........so if we take a profile,the hottest point would be on the solder pad and the coldest would be o
Electronics Forum | Wed May 22 11:00:14 EDT 2013 | davef
Senor Tech: Roland and I talked about this situation in our weekly meeting and thought that it would be neat to add a feature to 'Equipment Wanted' that allowed the listing to be a blind Request For Quote [RFQ]. In this, the RFQ not show on the onlin
Electronics Forum | Tue May 21 15:30:21 EDT 2013 | williamaxler
There is two different ways to make this work. To get the Add Project button enabled find your EasyOLP installation folder and modify OLPoptions.ini change MultiProject to 1. Now you will be able to add multiple jobs together and optimize. You c
Electronics Forum | Wed May 29 12:15:10 EDT 2013 | kevslatvin
Is this the CL or CLi feeders? I've always gotten mine from Assembleon. Mostly because I can't seem to ever find any used CLi ones when I need them, which is what we use. Seems to be plenty of used CLs around. You can browse thier webshop on thier w
Electronics Forum | Tue May 21 15:37:36 EDT 2013 | armelinda
I am looking for a service providing non contact PCB flatness measurement for open board SiP assembly. It was returned for failure analysis with complaint that assembly does not solder properly onto customer system board. Since there are remnants o
Electronics Forum | Wed May 22 19:41:11 EDT 2013 | bvdb
We're located in New Zealand running an older Fuji pick-and-place machine that uses long rubber conveyers about 1/8" diameter and 8 feet long to move the PCB through the machine. The ones on our machine are old and keep breaking. We've been repair
Electronics Forum | Thu Jun 13 08:53:25 EDT 2013 | markhoch
Ahhh yes. The infamous round rubber belts used on the Fuji CP2's and CP3's. :) I remember fondly using a pair of dykes and a Bic Lighter to make my belt repairs. Does anyone know if these are still available from Fuji? You may be able to find repl
