QUOTE(0168257061 @ Apr 10 2014, 09:26 PM)
switch i use 400.
led ...260-280...pain in da ass ( so slow )
400C is too hot for lead solder
260C is too low for lead solder
You should target 300-350C
400-450C is for lead free solder. You use this when you want to fix/remove switches from stock keyboards. Be sure not to mix your tips.
You can still use 400C for lead solder, but you're gonna kill your components faster if you leave the solder tip contact too long.
Look for the Pb Free logo on the PCB if you are not sure whether your board is Lead free or not.
Are you still wetting the solder with half coverage like you showed during the gathering, or do you wet the pad fully before removing your solder tip? If you assembled keyboards with half-wet pads, those things are going to fail faster because of the lower mechanical reliability.
http://www.circuitrework.com/guides/7-1-3.shtmlQUOTE(yuktsi14 @ Apr 10 2014, 09:41 PM)
I totally messed up
Do you use a sharper soldering head?
Sharp soldering tips are pretty useless for what you want to do. i.e. desoldering LEDs. If you are talking about SMD components, then that is another story. You would want something like this
http://malaysia.rs-online.com/web/p/solder...n-tips/2694045/Chisel tip , 2.4mm (some call it screwdriver tip)
Generally you want to use the largest surface area contact between your tip and the solder for optimal heat transfer. This means that the solder melts fast and you can suck them out quickly. For desoldering, I use 2.4mm, for soldering I use 1.6mm
For desoldering LEDs, my advice is that you should use the cheaper solder (60/40 type) and add it to the 2 pins until it forms a solder bridge. While heating the solder bridge on one side, pull out the LED on the other, with a tweezer/plier, and then clean the pad. This is the best way I use to remove LEDs. Other methods are just horrible without a powerful desoldering pump, or good desoldering irons like a Hakko 808.