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Re: [Homebrew_PCBs] Double sided boards

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  • kevinmwolf@aol.com
    Thanks for the tip Tony- I ll give that a try next time -K ... From: ajsmith@rivernet.com.au To: Homebrew_PCBs@yahoogroups.com Sent: Mon, 30 Apr 2007 5:21 AM
    Message 1 of 11 , Apr 30, 2007
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      Thanks for the tip Tony- I'll give that a try next time

      -----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!


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