Electronics Forum | Wed May 15 12:53:19 EDT 2013 | mchawg
I am having difficulty programming/inspecting a large SMT Relay. It is a dual in-line through-hole package with 5 leads per side formed to a gullwing configuration on .100" pitch. We have programmed it as a SOW10 pkg and got usable lighting values bu
Electronics Forum | Thu May 16 04:54:33 EDT 2013 | aj
Hi all, I have an intermittent problem on a 265 GSX printer. "Position error" on the rising table.. quite a lot of work has been done with no success. such as motor, break , encoder replaced....diagnostic checks etc.... Machine could run for a few
Electronics Forum | Sat May 18 10:21:09 EDT 2013 | davef
isd.jww: Comments are: * Current thinking has flux volatiles being the major contributor to voiding, not scavanging by via * I have no reason to think that 0.3mm via won't gladly accept solder. Plug them, if that's a concern. * If your concern is ina
Electronics Forum | Sun May 19 23:38:57 EDT 2013 | shrikant_borkar
We are EMS. Later revisions and Other models are get Modified. Now we have some remain Stock of Pcbs abd there end also. We have taken trial with Reduction in Apparatuses. But even small amount of solder paste at thermal Pad is causing QFN lift up.
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
