Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hi Mark,

If you are using a hotplate, the contact between it and the PCB affects the
PCB's temperature. In that case, you also ought to have a cover that
matches the hotplate temperature (good contact). That then in effect forms
a mini-oven with uniform temperature.



It might be more convenient to have an oven with proper air circulation and
independently of the oven temperature control, attach a thermocouple to the
bottom of the PCB to monitor its temperature.



Do you have any pictures of the modified laser printer?

Bertho



From: Mark Lerman Sent: Thursday, April 03, 2008 08:39
Bertho,

I wouldn't have thought that opto interruptors would be that
repeatable. I'm going to run a sheet of paper through a laser printer
twice and see how well duplicate images register - a rough measure of
what's easily accomplishable.

I just bought a pid controller - going to put it on a hot plate and
see what happens. Or maybe an oven? Which is better for smt soldering?

Mark





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