Homebrew PCBs

Thanks for the tip Tony- I'll give that a try next time
-K 
 
-----Original Message-----
From: ajsmith@...
To: Homebrew_PCBs@yahoogroups.com
Sent: Mon, 30 Apr 2007 5:21 AM
Subject: RE: [Homebrew_PCBs] Double sided boards


> On 29-Apr-07, at 6:15 AM, fredbutz wrote:
> >
> > But now I want to do a double sided board.
> >
> > Does anyone have any suggestions for lining the sides up
> >
> >
> Anyone having trouble with alignment due to expansion of the 
> paper? Whenever I transfer the image onto my boards, its 
> always much larger than when it comes out of the printer. I 
> assume that its due to the heat of the iron.
> Anyway, it seems to make dbl sided boards nearly impossible. 
> Any suggestions on how to avoid this?

Run the paper thru the laser a few times before printing the PCB image. 

Since it can be a bit hard to print a blank sheet, make a small text file,
(just a single word will do), and print that to the same page a few times.
Then print the PCB.

Movement is caused by water content. When printing the paper dries out, so
it shrinks or warps a bit.

You need to use the paper straight away, before it starts absorbing water
from the air. Don't forget to turn off the steam option on the iron too!
:)

Tony


 
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