Thank you for that link. My method so far has been:
- preheat oven for about 3-4 minutes as I'm finishing up with placing the SMD parts
- place board in oven
- Bake for 4 minutes at full blast
- Turn oven off and let it sit for 1 minute
- Open door and start work on the next board, so it cools over about 20 minutes
I'm using lead-free solder and have done about 20 boards this way. The solder gets shiny between 3:00 and 3:30, and once in a while I use a piece of temperature crayon:http://www.stencilsunlimited.com/temperature-marker-475-f-p-75.html?osCsid=fd3d5a9017f9d392e15775a65edc8bbe
and it melts at the same time.
So far everything I've done this way has worked; the only problems I've had are a couple of FT232RLs with bridges (I think if I went to a 3 mil stencil that would solve that problem).
I do need to build something to control the oven -- I was thinking of something very basic with just 2 buttons (preheat for 2 min, bake for 4 min), no other interface.
I've read a few web pages that say this is all that's necessary, but it looks like there's a lot of people making their own controllers too...so now I don't know what to do...I would appreciate any insight / opinions you have.