Homebrew_PCBs

> Derek with the nice photos wrote:

Flattery will get you nowhere.

> Drilling before etching is what you HAVE to do
> if you want through plated holes or multi layer.

IIRC, only the outer layers are etched after drilling. Inner layers
are etched, stacked and epoxied before the first drill. Whatever, I
was referring to 1 or 2 layer boards, which in reality you may end
up doing most of the time.

> I reckon I woudl be happy with one thou
> backlash. And if I was not happy with it I
> reckon I would just always approch a hole from
> the same direction.

Even the free CNC software packages come with backlash compensation
built in. Doesn't help much for some milling operations but works
fine for drilling.

> CNC is a must I feel fot PTH.

A word of advice...Send out any boards you're selling...If your
clients can't wait or afford it then you're in the wrong business.

--- In Homebrew_PCBs@yahoogroups.com, "Andrew" <andrewm1973@...>
wrote:

>