Electronics Forum | Mon May 31 11:04:06 EDT 2010 | aj
Hi Manuel, Do you not have a fine pitch placer?if not may be you need to slow down the placement speed on the QFN - I would imagine you would get a lot of fails trying to use the vision to pick up the component lands. We place thousands of QFNs and
Electronics Forum | Thu Jun 10 16:51:01 EDT 2010 | daxman
Hi Manuel, We've been placing QFN's with our CP6's for a long time now. We use vision type 10 just like you describe. I wouldn't bother with front lighting & trying to pick up the leads. Inspecting the leads doesn't provide better accuracy. I would
Electronics Forum | Sat Jun 19 08:07:39 EDT 2010 | fortunetech
If you want to buy a Juki machine or any machine for that matter, then be ready with money in hand and you set the price you are willing to buy at today. In my experience alot of Asian Brokers want your best price up front, and then tell you it's too
Electronics Forum | Tue Jul 20 15:03:08 EDT 2010 | bigdaddysoy9
Dan, If you are starting a library from scratch, it will probably take a while to program on any machine. Building a library is the most time consuming part. We use ViTechnology machines. They have a generic library that you could use to generate
Electronics Forum | Fri Jun 25 12:19:52 EDT 2010 | operator
I have always been under the impression that you want the flux make-up of your cored wire and supplemental flux (squeeze bottle) to be as identical/compatible as possible. I was just looking over a manufacturers datasheet for a resin-based cored wir
Electronics Forum | Tue Jun 29 20:50:20 EDT 2010 | davef
For day-to-day production, you're going to need to document that you've: * Pulled an item from floor stock * Returned an item back to floor stock ... not everyone is capable of doing that process. Currently, you have an established in-bound material
Electronics Forum | Wed Jun 30 12:45:59 EDT 2010 | rgduval
Dave hit the hottest issues. But, I would emphasize the cycle counting!! Your inventory will quickly lose control of scrap percentages. That is, you may set your system to, say, 5% scrap....but, your operator and/or machine may lose 10% on a parti
Electronics Forum | Wed Jun 30 12:48:40 EDT 2010 | rgduval
oh, yeah... there's a potential issue with AVL utilization per job; depending on how your system is set up now to handle this. If, say, one internal part number contains multiple vendor part numbers, and your MRP system defines which vendor to use
Electronics Forum | Thu Aug 19 15:26:34 EDT 2010 | namruht
Thanks everyone. I have thought about the moisture in the paste a lot, but never really gave the raw card moisture any consideration. The next time we run an assembly with the issue I will try baking some of the cards once the issue shows up to see i
Electronics Forum | Wed Aug 18 02:17:37 EDT 2010 | tennythomas
I heard that one can create the stacked/staggered microvias in the layers 1-2 & 2-3 and skip microvia in the layer 1-3 of 6 layer stack up, when the prepreg is between layers 1 & 2 and the other prepreg is between the layers 2 & 3. I want to know w
