Paul wrote:
> transfer my pid control into my solding iron and found
> such a good try.  With my solding iron been pid controlled, the
> temperature goes within 3 degree and give such perfect, small sodling.
> It is much better perforomance than expensive Weller products (it gives
> 20C deg moving normally). By the better controlling, I now can set my iron
> at 197 C and get all kind of benefit with this temperature.

I don't know, but perhaps PID control is used in Metcal soldering
equipment.  They certainly seem to have much better temperature
regulation than anything else I've used.

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