Electronics Forum | Mon Mar 19 03:59:25 EDT 2007 | dougie001
is the component placed off all the time or does it vary? if the placement offset is consistent then there is every chance that the machine requires calibration (providing your program is correct) If it varies then there could be lots of things caus
Electronics Forum | Mon Mar 19 11:20:10 EDT 2007 | realchunks
When you say "No wetting" you mean the paste looks the same as it did going in but dried out? Or is it that you are not getting toe fillets?
Electronics Forum | Tue Mar 20 17:53:44 EDT 2007 | diesel_1t
is not getting toe fillet, you can se like a "paste dome" on the pad so the paste is not flowing to the pin...
Electronics Forum | Tue Mar 20 19:18:53 EDT 2007 | diesel_1t
Hi to all, thank you very much for your feedback. The part is rotated before inspection; and also tend to be shifted to the same direction of pre-rotation so i think is not correcting misalignment or maybe some settings on shape data are not correc
Electronics Forum | Sun Mar 18 23:01:11 EDT 2007 | diesel_1t
Hi there, I want help on the following issue. Where I work, we place a component QFP 256 terminals (20 mil pitch)from hitachi (renesas), we use a MPM UP-3000 screen printer, IP-III placement machine and Vitronics 8 zones reflow Oven. lead plating
Electronics Forum | Tue Mar 20 00:02:00 EDT 2007 | Darby
Some causes of skewing. If you have exhausted all mechanical problems for that head. Pickup data from tray is incorrect. If you aren't picking up in the exact centre it is possible that the component is being skewed after vision adjustment i.e. cent
Electronics Forum | Fri Jun 30 14:18:14 EDT 2006 | jdumont
We had been using the Kester Easy profile 256 paste and recently switched to the 256 HA (high activity) paste. Ive seen a reduction in shorts and better wetting on our more difficult to solder components. Both related to one another but both positive
Electronics Forum | Mon Apr 09 20:10:16 EDT 2001 | davef
Automation Group 256-858-3300 BLISS Industries 510-490-8401 EMC 215-340-0650
Electronics Forum | Tue Oct 01 18:21:47 EDT 2002 | ejgallagh
Kester 256 has been v.good for us,
Electronics Forum | Fri Nov 19 16:00:37 EST 2004 | brent.robinson@donnellye.com
Forgot to mention that we use Kester Easy Profile 256 No Clean solder paste on 98% of our products.
.gif)
