Electronics Forum | Tue Mar 09 13:11:00 EST 1999 | Nancy
Maybe it is all what you get use to. Our assemblers like the vacuum pen. Since we do more than passive components, some parts would be difficult to hold and line up. As for as our Fristch, we use it as a manual and just have our bins on the side.
Electronics Forum | Mon Mar 01 12:50:47 EST 1999 | justin medernach
| Hello! SMT professionals, | | I do not know if anyone posted this question before. | Last week, I reflowed our newly designed thin Rigid-Flex pcb with 0.040" thickness. I found all of pins of a TQFP48 ic did not get wetted. I could see on the hee
Electronics Forum | Wed Mar 03 12:01:08 EST 1999 | Dave F
| I'm trying to get a feel for what the industry is doing with regards to collecting assembly defect data in the SMT/PWA process. Is it sampling or 100%? What are the points within the process where critical assembly defect data is collected. We run
Electronics Forum | Tue Feb 23 14:21:17 EST 1999 | Mike McMonagle
| A rash of new products here at my company have designs with multi-pin connectors 90 out-of-phase (orientation)wiht respect to wave direction, which has lead to massive bridging (shorts) problems.... | | Does anyone still use the 45 Degree Pallet
Electronics Forum | Mon Feb 22 13:39:22 EST 1999 | Justin Medernach
| Can anybody give me the Pros and Cons of of using Cartridges over jars and/or vice-versa. Also, if using cartridges, what is the best way to keep the paste from seperating, short of buying a mixer that cost over $5000.00 | Thanks, | Bill | Bill,
Electronics Forum | Thu Feb 18 17:29:54 EST 1999 | Stefan Witte
The circle is not a "good" fiducial. The gradually change in contrast of a circle versus a cross makes it difficult to find the center of the fiducial. By pre-tinning the fiducials there will be a convex mirror surface distorting the edges even more.
Electronics Forum | Fri Feb 19 00:32:40 EST 1999 | ZEEK
| We are using .040" diameter fiducials (global and local) on our boards. They are solder covered and HASL. I get batches of boards where the p&p vision system has trouble reading the fiducial. The fiducial looks dark on the screen. The board ven
Electronics Forum | Fri Feb 19 14:44:24 EST 1999 | Lance A. Smalley
You don't say what kind of machine you are using but several just use the edge of fiducials to determine area (and centers). If you are teaching in binary and have the ability to select a decision level (threshold), use a level half way between loss
Electronics Forum | Sat Feb 20 09:41:51 EST 1999 | Andy
| We are using .040" diameter fiducials (global and local) on our boards. They are solder covered and HASL. I get batches of boards where the p&p vision system has trouble reading the fiducial. The fiducial looks dark on the screen. The board ven
Electronics Forum | Mon Feb 22 14:02:17 EST 1999 | Michael Allen
We have resorted to adding a ring (or donut) around our 0.040" round fiducials. The donut acts as a "plating thief" to minimize the thickness of the copper plating (in the case of HASL finish) and of the solder plating (in the case of solder-plated