Homebrew PCBs

On 10/19/2013 7:29 AM, kabowers@... wrote:

> You can also "overcook" the transfer process..... With a 2x2 board I iron for about
> 70 seconds, while a 4x6 board requires about 150 seconds. YMMV
>
> IIRC my iron is about 430F.

I mentioned this earlier but one way to take the guess work out of this 
is to measure the board temp with an IR thermometer.  I find that 300F 
works well with PnP and label backing.  I don't think pressure is 
important at all as long as it  is evenly distributed during the 
transfer by moving the iron around.

Preheating the board, and time vs iron temp and heat transfer vs board 
size can all be ignored.  Just scan the board occasionally and stop when 
it gets to 300F or whatever works for you.

I then lay a flat piece of tool steel on top and cool in place.

You can get IR thermometers for less that $20 these days.

Jack K9ACT




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