Electronics Forum | Sat Jul 07 04:30:23 EDT 2001 | johnw
Dave this seems to be happining at placement altough when u run cal board the palcement is fine could the glue density be causing this
Electronics Forum | Fri Apr 18 08:24:49 EDT 2003 | tsongshe
Hello,all.these days I met many skewed transistors after reflow soldering.we 've tried many ways attemting solving it thoroughly...changing the aperture pattern,solder volume and even changing the size of pcb pad,but the results are not very good.eve
Electronics Forum | Fri Apr 18 10:28:57 EDT 2003 | davef
Here's how Kevin posted his pix http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=24067
Electronics Forum | Fri Apr 18 18:11:38 EDT 2003 | slthomas
"glue the floater in place with chip bonder before reflow" gets my vote. We have decals for DPAKs and TO-252's that don't match either specification, and chip bonder is the only answer if they won't spin the board for you.
Electronics Forum | Wed Apr 23 03:49:13 EDT 2003 | jedduan
I think it will make some progess if you modify the program and let the component shift towards the lead orientation as possible while P&P.
Electronics Forum | Fri Sep 26 12:57:09 EDT 2003 | Angie
We have had some components that popped off in our IR oven. It was attributed to the solder paste. The humidity was above 60% the temp was about 70 degrees.
Electronics Forum | Mon Oct 06 14:39:20 EDT 2003 | dgjjr
I definately agree about OEM's skewing the data on such a proposed site. I was a service engineer for an OEM for 13 years and I know from experience; the marketing guys rake through these forums daily looking for any oportunity to promote the brand.
Electronics Forum | Sat Nov 22 08:14:47 EST 2003 | davef
When the pads on the board are too large, the component tends to swim. This skewing can be a BIG problem with connectors, eh?
Electronics Forum | Sun Sep 25 16:02:59 EDT 2005 | mark
The calibration was ok. When i switch off the back camera and use front one everything is ok. Is it true that when Topaz use back line camera after checking the components the machine rotates the components 180 degree?. Mark \
Electronics Forum | Mon Sep 26 07:56:38 EDT 2005 | pavel_murtishev
Hi! Try to make "R_AXIS_ACCURACY" calibration for all of FNC heads for back camera only. I met such problem on Topaz-X. There was clearly seen offset on 0.8mm pitch components. I simply calibrated all cameras for FNC nozzles and problem disappeared.
