Electronics Forum | Wed Nov 17 14:58:04 EST 2010 | otipicni
Hi everybody. I need to calculate the moment of inertia of a pcb (with its components) and also its center of mass. The pcb is not manufactured yet. Before that I need to verify those properties. How could I do? The pcb will weight around 50 g. Shou
Electronics Forum | Thu Apr 15 11:13:24 EDT 2004 | pjc
Sn corrosion effects were studied for stainless steels, coated stainless steels, titanium, cast iron, and other materials. This study can be found in the SMT Library under "Equipment Impacts of Lead-Free Soldering" Electrovert uses a Melonite coating
Electronics Forum | Tue Jan 20 20:12:05 EST 1998 | Mario Lapointe
SMT-ASSY is a training center located in Montreal, Canada. We are currently looking for representation in these area: Maine, New Hamphire, Vermont, up to Connecticut. SMT-ASSY offers many different training programs for though hole and surface moun
Electronics Forum | Tue Jan 20 20:09:33 EST 1998 | Mario Lapointe
SMT-ASSY is a training center located in Montreal, Canada. We are currently looking for representation in these area: Maine, New Hamphire, Vermont, up to Connecticut. SMT-ASSY offers many different training programs for though hole and surface moun
Electronics Forum | Tue Feb 06 10:55:58 EST 2001 | pjc
Larry, Our specification is 0.075% for our Fuji CP3 and IP2 machines. At or above that figure the Maintenance Dept. has to get to work. We typically see 0.03% to 0.05% on average. The Fuji machines are all vision centering. We have found feeders are
Electronics Forum | Sun Nov 06 13:12:17 EST 2005 | sk
Hello, I use Siemens MS128 & HS180. I need to place a lot of TO-252AA, SOT223, ... components. At the moment I use only mechanical centering but I want to center these components opticaly. There is no problem to center chips and other symetrical com
Electronics Forum | Mon Feb 21 13:57:37 EST 2005 | JB
Start by verifying the component definition, the thickness is critical. HSP 4796 uses nozzle 81 for 0402's. Make sure is using the right nozzle. If you need to, use the autoteach function to physically teach the dimensions of it, thickness included.
Electronics Forum | Wed May 24 13:42:27 EDT 2000 | John McGriff
We just had a similar problem with misplacement, and it turned out that the designers had not put the local fiducials in the right places. I am told that placement machines typically recalculate the component centroid to be at the center of a line b
Electronics Forum | Thu Nov 11 19:07:39 EST 1999 | Gary Kemp
We are having a continuing problem with 0603 chip capacitors not centering themselves on the pads during the reflow process, causing an open condition at one end. Does anyone know what can be done to alleviate this? Thanks much. Gary
Electronics Forum | Wed Jan 17 10:14:37 EST 2007 | slthomas
2-3mm would seem close enough to affect the air flow and I was thinking it could be displacing the qfn. However, if you ran a failed board back through reflow and it was functional after that, I'd put my money on insufficient reflow. I suppose it's
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