Your fence is misaligned. The pictures clearly show that you are cutting at an angle. I have the Qep 4" saw from Home Depot. It has tiny registration marks at each end of the fence, but you cannot rely on them. I had the same problem. Just use a square for alignment relative to the blade before you clamp the fence.
Baxter
--- In Homebrew_PCBs@yahoogroups.com, Alessio Sangalli <alesan@...> wrote:
>
> Hi finally tonight I tried the table saw (Harbor Freight one) with the
> lopacki 8mil diamond blade.
>
> Unfortunately, all cuts were not parallel:
>