Electronics Forum | Thu Jun 08 17:21:31 EDT 2006 | PWH
EC - I hope you don't mind that I add to your question... We are running lead free assemblies now and parts that normally hang on upside down are falling off. Any advice on this from others new to lead free?
Electronics Forum | Fri Jun 09 04:21:20 EDT 2006 | rlackey
Hi EC, there was an in depth post dealing with this back in 2000 from the now legendary Bob Willis: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=1468&#Message6342 Cheers, Rob.
Electronics Forum | Thu Jun 08 03:40:32 EDT 2006 | aj
Hi, I use convection reflow and both top & bottom settings are the same. Is the part too heavy to rely on surface tension? there is an equation that can determine this (aswell as real test i.e. part falling off) We have some SIM Card holders on bot
Electronics Forum | Wed Oct 11 20:52:51 EDT 2006 | psgill
Guys, Any of you tried running different setting on the top & bottom side temperature on the reflow oven. I'm trying to address uBGA coplanarity issue using this method. Assume board are flat. Any inputs?
Electronics Forum | Wed Jun 12 04:02:00 EDT 2019 | liyunqiong
SMT reflow soldering temperature setting and process flow: The influence of SMT reflow process parameters on the key parameters of reflow soldering temperature curve provides reference for the setting and adjustment of reflow soldering process para
Electronics Forum | Thu Aug 11 12:45:42 EDT 2016 | anhsang38
Dear All I have a question for the reflow machine. I'm using Vitronics(Mr933+)reflow. The peak temperature of the (Chip, LED, SOT) component higher than (QFP,LGA) about 4 degree when i measured proflie. All of them on the same board . I don't know w
Electronics Forum | Thu Jun 08 04:31:24 EDT 2006 | vasily
Hi First I think you have to analize your PCB design. Heavy weight components should be gathered on one side of PCB. As I think, if you want to reflow both sides simultaneously there might be a problem. A chance that large components will drop off
Electronics Forum | Thu Oct 12 08:12:51 EDT 2006 | realchunks
I have, but not for what you are trying. Different ovens and styles react differently when you try this, so you have to experiment to see how far you can go. Why do you think different temps top and bottom will solve the coplanairty issue? Is this
Electronics Forum | Fri Aug 12 08:52:29 EDT 2016 | sarason
In short physics. A large Black object will absorb more energy than a smaller non-black object. Thus the temperature will remain lower around the black object as it heats up ! sarason
Electronics Forum | Thu Aug 11 20:12:12 EDT 2016 | davef
Different points on the board couple have different thermal masses. Look here: http://www.ecd.com/portals/5/products/vmole/V-MOLE-Verify-3-Thermocouple.pdf
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