Who does smt with a toaster oven?
May 16, 2007 at 2:01 PM Thread Starter Post #1 of 12

ezkcdude

500+ Head-Fier
Joined
Mar 29, 2006
Posts
992
Likes
17
I really don't have time these days to sit down for 5-6 hours at a time for building, so I'm thinking of trying out the toaster oven reflow method (e.g. http://www.instructables.com/id/EBXC...623C/?ALLSTEPS). What advice does the collective mind here have about this technique? Do I need a fancy oven? Does anyone have a specific recommendation (brand/model)? I'd appreciate any input
eggosmile.gif
.
 
May 16, 2007 at 8:06 PM Post #4 of 12

Pars

Can Jam '10 Organizer
Joined
Oct 28, 2003
Posts
4,127
Likes
55
Nope, no joke. I read one guy (can't remember where) that measured his toaster oven and could almost exactly duplicate the temp curves/cycle of a commercial reflow unit.
 
May 16, 2007 at 9:08 PM Post #6 of 12

Alfiax

New Head-Fier
Joined
Nov 5, 2004
Posts
22
Likes
0
From what I've read, this process takes a lot of time and care and a lot of experimentation to set up right. It seems to be basically the only clean way to do high-density packages at home without shelling out for a rework station, but for run-of-the-mill SMD stuff the pick, place, and solder method seems to be considerably easier. The only exception I can think of in audio DIY work would be for an exceptionally complicated DAC or for working with extremely small chips like the TPA6130.
 
May 16, 2007 at 9:20 PM Post #7 of 12

ezkcdude

500+ Head-Fier
Joined
Mar 29, 2006
Posts
992
Likes
17
Quote:

Originally Posted by Alfiax /img/forum/go_quote.gif
The only exception I can think of in audio DIY work would be for an exceptionally complicated DAC or for working with extremely small chips like the TPA6130.


Well, take a look at my ezdac project, and let me know if it is complicated enough
wink.gif
.
 
May 16, 2007 at 9:44 PM Post #9 of 12

mono

1000+ Head-Fier
Joined
Jan 10, 2005
Posts
1,412
Likes
11
For the EZDAC it looks like it would be as easy to do a drag soldering method (gratuitous video example) or use a hot air station to reflow paste. I mean you already have a significant # of through-hole parts too so it's yet another step.

Also I don't see how you'd be significantly cutting down on solder time, would think the 5 hour figure would have to include the unpacking and placing parts prior to soldering, which is a step also necessary with the toaster oven.

I'm not trying to shoot down the idea though, had actually thought of trying it myself since I have an old toaster oven sitting around but it's a cheapie, I don't know if it has uniform temperature throughout the cavity. Main deterrent might have been cost of the paste and it's short shelf life, and quirky ordering through places like Digikey where you have to have it shipped next-day.
 
May 16, 2007 at 11:09 PM Post #10 of 12

AndrewB

100+ Head-Fier
Joined
Jun 21, 2001
Posts
463
Likes
10
The most time intensive part is prep. Once you have the solder paste applied and placed the smd devices. It only takes about ~25 minutes at 325F for the board to flow. The only other significant time is the cool down period. Approx. 30 minutes for cool down. You do not want to disturb the board during cooling, better if you waited and hour or so.

I've built many engineering prototype boards with this method, with some very high density smd's. After the smd's are done, then you do the thru-hole components. Patience is the key
smily_headphones1.gif
 
May 16, 2007 at 11:25 PM Post #11 of 12

threepointone

500+ Head-Fier
Joined
Sep 10, 2005
Posts
543
Likes
11
haven't tried it yet, but from what I hear, while toaster oven reflow is good, skillet reflow is even better. So good, that from what I understand, sparkfun.com "manufactures" most of what they sell using the reflow skillet method. They have an excellent series of tutorials on surface mount soldering/fixes/stenciling/solder paste prep/everything else on smt soldering here: http://www.sparkfun.com/commerce/hdr.php?p=tutorials.
 
May 16, 2007 at 11:32 PM Post #12 of 12

Joshatdot

Headphoneus Supremus
Joined
Jan 30, 2007
Posts
2,960
Likes
11
Location
Anacortes, WA USA
I would use a Heat Gun
 

Users who are viewing this thread

Top