Electronics Forum | Fri Apr 24 20:33:06 EDT 1998 | D.Lange
| Looking for anyone who has experience with high temperature soldering. Need to determine why solder joints are failing. Thermocycling of unit is -40C to +140C, 30 minute dwell time, 10 sec. transition time | Your help is appreciated | Ed Holton |
Electronics Forum | Fri Nov 25 20:57:30 EST 2016 | sarason
You guessed right. Not hot enough to get good reflow. regards sarason
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 | Fri Aug 12 09:49:19 EDT 2016 | deanm
In general, smaller objects heat up faster than larger objects because they are lower mass. For example if you heat up one liter of water in pan and two liters of water in another pan with the same heat energy applied, the smaller mass will heat up f
Electronics Forum | Mon Mar 04 13:13:52 EST 2019 | scotceltic
What temperature spec are people using in the industry to make sure an electronic component is SMT reflow compatible ? Ex. I have some parts that I want to possibly process as Pin in Paste but am not sure what temperature ratings the plastic will m
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 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 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
Electronics Forum | Thu Aug 11 22:38:22 EDT 2016 | anhsang38
Dear Davef Thanks for your information. I already have measured it at the same position for 2 kind of component but the result does not change. Pls help me...
