Electronics Forum | Fri Aug 10 09:24:10 EDT 2007 | babe7362000
I am seeing allot of issues with SOD-323's in our Heller Oven. The parts seem to move or blow off their pads. We do have all the fan speeds on low and still having this issue. The parts are sitting in the paste not on top, so there is some force o
Electronics Forum | Wed Aug 22 08:30:02 EDT 2007 | davef
Could there be a vibration on or jamming of the conveyor of your oven that is causing these parts to tip-over?
Electronics Forum | Wed Aug 22 09:59:06 EDT 2007 | slthomas
Are there long lags between print and place, and place and reflow? Could your paste be losing some of it's tack?
Electronics Forum | Wed Aug 22 22:07:53 EDT 2007 | mdm4ua
Easy fix is put a drop of washable mask on the side of part before reflow. The mask dries before the solder reflows and holds the part in place. After reflow it washes away.
Electronics Forum | Sun Mar 04 07:48:50 EST 2012 | dilogic
Are you sure that the parts are bouncing? We had similar problem where diodes were placed very closely and occasionally nozzle pushed already placed part away (due to pick-up tolerance)...
Electronics Forum | Sun Mar 04 01:56:37 EST 2012 | eadthem
What we have had recently is a lot of larger thin (32 thou) thickness boards that have had issues with SC90 diodes bouncing off the pads in the final PNP machine. Our setup, universal instruments GC120 or quad beam 30 spindle lightning heads. This m
Electronics Forum | Wed Aug 22 14:28:56 EDT 2007 | russ
our biggest problems with these parts is them laying on their sides after placement with a certain machine that we have. make sure that you do not have a planarity issue as well menaing that the leads are indeed below the body of the component. I a
Electronics Forum | Wed Aug 22 16:11:15 EDT 2007 | razor1
If the problem appears to be random... we had a similar problem. We found that the belt which feeds the PCB through the reflow oven would jump or lurch ahead. It was barley noticeable but if you have identified the frequency and time of the compone
Electronics Forum | Wed Aug 22 16:23:06 EDT 2007 | rgduval
I had the lurching issue...turned out I needed to readjust to cog wheels on the exit side of the oven. The cogs had slipped, and the chain was actually getting caught in the teeth...to the point that as the wheel turned, the chain would stay in it i
Electronics Forum | Mon Mar 05 17:54:07 EST 2012 | swag
Three ideas for you: 1) Make sure nozzle tips are clean. 2) Check coplanarity of leads to bottom of body. If leads are above body, it could be the are not contacting paste well. 3) Investigate static charge in the parts caused by the feeder or
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