Electronics Forum | Mon Jan 26 03:45:37 EST 2004 | Vinny
Hi All, We are producing a veriety of RF related PCBAs in which we see Unsolder/Mislaigned on a regular basis. In these baords usually one of the pad is connected to a signal trace and the other pad is connected to very huge ground plane. This gro
Electronics Forum | Thu Jan 29 00:10:17 EST 2004 | Vinny
Hi Dave, Thanks for your reply. I have tried getting the design changed from the customer but they cannot provide thermal relief as this changes the RF performance and they cannot afford to do that. As for profile it does reach the reflow tempera
Electronics Forum | Mon Jan 26 20:11:02 EST 2004 | davef
The primary driver to the set points for your oven is not the board or the number of zones in your oven. It's your paste. If you need a "ball park" guesstimate as a starting point, your equipment supplier is probably the best place to start. So fo
Electronics Forum | Mon Feb 23 20:19:15 EST 2004 | greg york
Has anyone ever seen a bulbous joint (on 1 side > of 1 designator) on every board? I checked the > preheat profile at the wave and have played with > dwell times but can't get rid of it. I checked > the archives and didn't find much. Any help wou
Electronics Forum | Tue Mar 02 17:26:24 EST 2004 | pjc
I worked on MicroFlex. All axis move via electric motor drive. Carraige reapatability is +/- 0.0005" (12 micron). Cameras position more easily on linear bearings than the swivel type. The alignment accuracy and repeatability easily supports sub-20mil
Electronics Forum | Thu Mar 04 20:50:26 EST 2004 | Mike Konrad
There are several companies that manufacturer stencil cleaning systems. They include: Aqueous Technologies www.aqueoustech.com Smartsonic www.smartsonic.com EMC www.emcgti.com PMR www.pmrsystems.com JNJ www.jnj-industries.com UnitDesign www.un
Electronics Forum | Sun Mar 28 22:17:36 EST 2004 | Grant Petty
Hi, I would also be interested in this thread, but our problem has a different twist to it. We have good results from our reflow with Koki no clean paste, however when we pass the boards through the wave solder machine, the flux in that leaves a fog
Electronics Forum | Wed Mar 31 10:16:01 EST 2004 | caldon
Being a former Apps Engineer I hear what yer saying. The 10" Leg Screw was hypothetically speaking about Siemens Machines. Since they do go lower the need for a 10" leg screw is needed. They do not use a 10" leg screw they use platform feet risers in
Electronics Forum | Sun Apr 04 08:03:41 EDT 2004 | davef
There certainly is a problem, but it�s unclear from your description whether the source of the problem is: * Design * Soldering * Component quality * A combination Recognizing the SMT connectors see stress that other SMT component do not, you give t
Electronics Forum | Mon Apr 12 15:52:12 EDT 2004 | wgaffubar
I am using Indium 92J type 4 solder paste due to a BGA site with .008" pads and stencil opening of .009" square and .005" stencil thickness. When I try the type 3 we get insuffecient print. The aspect ratio tells me that I should be using a type 4. T
