And yet another problem is that the "pulsar" type toner transfer paper stretches with heat and moisture. I found that no matter what printer I used I could never get double sided artwork to line up close enough for cnc drilling. This is exacerbated on large boards and hardly noticeable on very small boards. I finally gave up on boards bigger than 3" in either dimension and went first to direct inkjet printing (which was never very reliable) and finally back to the negative photo method.
Anyway, my 2 cents.
--- In Homebrew_PCBs@yahoogroups.com, kabowers@... wrote:
>
> On Fri, 09 Aug 2013 23:44:44 -0000, you wrote:
>
>
> >> <SNIP>
> >
> >Unfortunately not true.
> >
> >Laser printers will get the X axis spot on
> >and repeatable every time.
> >
> >They often have slip on the paper as it is
> >fed through and the Y axis may on some
> >printers be totally uncontrollable.
> >
> >Some are worse than others. The OP may
> >have one of the very bad Y axis printers.
> >
> If it's an older printer the rubber rollers may
> have dried out or developed a glaze.
>
> A good place to start might be the paper pickup mechanism.
>
> Keith Bowers WB4LSJ- Thomasville, NC
>