Homebrew PCBs

On Mon, 13 Jun 2005 19:07:21 +0200, derekhawkins <derekhawkins@...>  
wrote:

>
> I'm only using artwork printed on paper at this point. If it cannot
> drill that properly then it's pointless trying with an actual board.
> Already using scaling factors of 1.002 for the X axis and .999 for
> the Y axis. For a 6" X 4" matrix of 1/4" spaced holes printed at top-
> center using the laser it does better than I could ever hope to drill
> manually but for a 9" X 7" matrix there seems to be skewing (greater
> than 10 thou) at one of the outer edges. Scaling can't help in that
> case. So you think it's fuser heat causing it? But the injet isn't
> much better either even though its errors are elsewhere.
> BTW, a word of advice....Forget the toner transfer method.


lasers have distortion from rotational conversion i am told.
inkjets should not have that.


I will not have heard your comment about TT, as i inted to use it with a  
CNC.
with silicone paper there is no more distortion as there was with the  
madly shrinking inkjet paper.
I have done 15cmx15cm tests with no measurable distortion after transfer.  
(i do not need greater boards).
Have you tried it? how bad was it?


ST