Electronics Forum | Thu Sep 13 13:34:49 EDT 2001 | Dave G
Too much Convection Airflow in the Reflow Oven blowing parts around ? Moisture Contaminated Parts out gassing ? Board out gassing? Just some thoughts, DG
Electronics Forum | Fri Sep 14 01:43:36 EDT 2001 | dhanashekar
please check the following also. in one of the cases we came across the second point was the problem. 1. the parallelisum of the conveyor. 2. the warpage of the board. 3. the stencil.(the differential height in the paste deposition of the two pads
Electronics Forum | Thu Sep 27 21:19:56 EDT 2001 | stimpy
>> try a linear ramp to allow the entire pcb to heat up evenly. What is your conveyor speed?
Electronics Forum | Thu Sep 13 11:21:45 EDT 2001 | aldo_maldonado
We've had several instances of parts (1206R, SOT-23) popping off of their location during reflow. Parts placement is OK, paste brick is aligned and compact before oven. But we get random parts off their location just lying somewhere else on the boar
Electronics Forum | Thu Sep 13 17:57:59 EDT 2001 | davef
You're correct. It is curious. Possible angles to look at are: 1 WS609 loves moisture in the air. In high humidity shops, this paste hakes-on liquid. If this is the case, you should also see slumping, resulting in fine pitch bridging, and solder
Electronics Forum | Fri Sep 28 09:30:07 EDT 2001 | kmorris
Just had a similar phenomenon 2 days ago. May relate to your issue --- or not. Like you, I did a once over looking for mechanical obstruction & couldn't find any. Ran a thermal profile on the offending PCB & all checked out. Looked in end of oven
Electronics Forum | Fri Jun 29 13:50:15 EDT 2012 | tbouslog
We are having some problems with parts that are glued on untill our PCBs go to wave coming off. We would like to test the stenght of the glue. Does anyone have any ideas on how to test pull off strength, torque strength, and push off strength? Any in
Electronics Forum | Fri Jun 29 17:17:29 EDT 2012 | davef
Here's a link to one of my favorite threads on measuring glue from the fine SMTnet Archives ... http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=17437
Electronics Forum | Wed May 17 11:59:27 EDT 2006 | james
Did you have to get the controller as an option?
Electronics Forum | Thu May 18 15:13:50 EDT 2006 | Chunks
Who says this forum is worthless? Great thread guys.
