Pages: [1]   Go Down
Author Topic: HOt air gun?  (Read 425 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Jr. Member
**
Karma: 0
Posts: 92
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

How do I desolder a component, a small component with a hot air gun? WIthout breaking it? And also if that is not the right way to desolder, what is?
Logged

Texas
Offline Offline
Edison Member
*
Karma: 25
Posts: 1298
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

No, not a hot air gun.

Use a soldering iron, and either a solder sucker (suction device), or solder wick (wire mesh that soaks up solder).
How many leads are you needing to unsolder ?
Logged

Good luck, Jack

UK
Offline Offline
Faraday Member
**
Karma: 92
Posts: 3969
Where is your SSCCE?!?!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

There are special "hot air guns" specifically for soldering.  They are known as "Solder Rework Stations", and blow very hot air (~300-400C) through a very small nozzle.  If you must use hot air (and for surface mount components it can't be beaten) then you really need to use a proper rework station.

Most rework stations cost hundreds of dollars, but there is a model around that is gaining popularity which is, not surprisingly, made in China, that costs considerably less.  The make is "Atten" and the model I got recently is the 858D+, and it cost me about 50GBP.  And I love it smiley

So no, don't what ever you do, try and use your Black and Decker paint stripper hot air gun - it will just kill your PCB.
Logged

Why not visit my eBay shop? http://stores.ebay.co.uk/Majenko-Technologies
Replacement for the Arduino IDE: UECIDE - Proper serial terminal, graphing facilities, plugins, overhauled internals.
Java isn't bad in itself, but it has enabled morons to write programs.

United Kingdom
Offline Offline
Tesla Member
***
Karma: 220
Posts: 6587
Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

If it's an SMD resistor or ceramic capacitor that you want to remove, then you can do it with a pair of fine-tipped tweezers and a soldering iron tip large enough to heat both pads at once. Otherwise, you need a hot air rework station.
Logged

Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

Lacey, Washington, USA
Offline Offline
Edison Member
*
Karma: 37
Posts: 1752
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

We really need to know what component. Is it surface mount, or through-hole? Two leads, or 44?

Chip-Qik is essentially a very low temperature alloy. You wick or suck up most of the solder already there, then flood it with Chip-Qik. It stays molten for a long time, the idea is to get all of it melted at once. A few leads, just an iron will do it, for something like a 100 pin gull wing device you can warm it all up with a rework station hot air.
Logged

Steve Greenfield AE7HD
CET Consumer Electronics and Computer

Offline Offline
Edison Member
*
Karma: 20
Posts: 2111
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Depending on the component, the hot air gun simply preheats the components (or a hot plate) then using  the soldering iron to finish the job...

If it's got more than 3 pins use tweezers and the hot air gun to lift it out if there's something near by that could be damaged there is tape you can buy to shield the components while using the heat gun...
Logged

Texas
Offline Offline
Edison Member
*
Karma: 25
Posts: 1298
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

If the component you are trying to remove, does not need to be saved, it may be easier to snip each of its pins, get it out of the way, and then unsolder/remove each of the pins individually.
Logged

Good luck, Jack

Offline Offline
Full Member
***
Karma: 3
Posts: 244
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
How do I desolder a component, a small component with a hot air gun? WIthout breaking it?
Looks like he wants to keep it ..
Logged

Lacey, Washington, USA
Offline Offline
Edison Member
*
Karma: 37
Posts: 1752
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

One of my desoldering instruments for 2 leaded SMD components is sort of a set of tweezers made of two soldering irons hinged together. You can also get or make special tips for a soldering iron that are broad tips with a relief cut out of the middle, so it bridges the component and heats both sides at the same time.
Logged

Steve Greenfield AE7HD
CET Consumer Electronics and Computer

Pages: [1]   Go Up
Jump to: