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View Full Version : Heat gun vs oven baking to resolder



barythrin
November 8th, 2013, 02:46 PM
Possibly a dumb concept but I've heard of both being used to reflow systems (with some protection around more delicate components). It's an off topic device (not vintage) but it'll be obsolete on the 15th ;-)

Anyway a few guides use the obvious heat gun but they mentioned a specific heat range in one document which was interesting (in celsius) but not a common range that I'm finding on the few cheap heat guns I'm seeing at local stores. Most I've found are dual settings for 572/1112 or 750/1000. I believe the gentleman suggested 325c to 375c.

Another guide recommended the oven baking technique (covering capacitors, and plug components etc in some putty like stuff) then some 8 hour bake on a low setting followed by a more concerning watched bake until the oven reaches 460 or 475 then I think the next step was to panic and throw open the oven door and start a fan to blow the hot air away from the oven.

Regardless I've heard of both techniques and being cheap/low on funds I was tempted to do the oven until I saw the timing. With a crap heat gun though I'm not sure I'd be doing myself any better favors.

Comments/Suggestions?

Chuck(G)
November 8th, 2013, 02:50 PM
Hot air rework soldering stations are getting cheaper. If you're really cheap, there are DIY projects (http://www.instructables.com/id/DIY-Hot-Air-Soldering-Iron-1/) to create one.

Here's another one. (http://www.usbmicro.com/documents/ACC430664DD26DDE5986574AAA62775FDFF29EA1.html)

Stone
November 8th, 2013, 03:01 PM
If you're really cheap,... Geez, Chuck, isn't that one of the prerequisites for this place! :-)

MikeS
November 8th, 2013, 03:13 PM
...Anyway a few guides use the obvious heat gun but they mentioned a specific heat range in one document which was interesting (in celsius) but not a common range that I'm finding on the few cheap heat guns I'm seeing at local stores. Most I've found are dual settings for 572/1112 or 750/1000. I believe the gentleman suggested 325c to 375c.I assume you're talking about a paint stripper heat gun? Check out an embossing heat gun, they're usually around 350C, cheap, and comfortable to work with.

barythrin
November 8th, 2013, 03:42 PM
Great point. I guess I never thought of what other uses a heat gun would have. Perhaps I AM finding devices for wallpaper/paint removal and not electronics? Could just be me looking just at the cheap crap which likely would be blowing on everything vs a more precise component.

Definitely appreciate those links chuck. I think I have most of that stuff at home already too so that may be another attempt. I'll likely see what happens and if it fixes the device and for how long before I approach with a better method.

MikeS
November 8th, 2013, 08:20 PM
Great point. I guess I never thought of what other uses a heat gun would have. Perhaps I AM finding devices for wallpaper/paint removal and not electronics? Could just be me looking just at the cheap crap which likely would be blowing on everything vs a more precise component.What kind of gun are you talking about? Did you Google 'embossing heat gun'? Here's one at Walmart for $16.00
http://www.walmart.com/ip/Embossing-Heat-Tool-with-Stand/10310557