Homebrew PCBs

> You would not have any way of knowing if it's too fast till you
break the tools.  
> With a controlled axis, you simply tell it how fast to feed in 
> inches per minute.  For small drills, the difference between 1 IPM 
> and 2 IPM will be the difference between a broken tool and a tool 
> that will drill all the holes.
Well, yea, guessing I get the parameters of the board and the bits,
which I won't, because the board, I don't know the material, and the
bits I buy are sold by the unit, attached to a piece of paper with
tape so they don't get lost. That should give you an idea of how we do
things down here :(

> For a stepper size reference, my CNC router uses 160 oz-in motors - 
> direct drive to ball screws running dry.  The way system is very 
> basic, UHMW plastic against aluminum.  It developes around 50 pounds 
> of cutting force - very approximate value.

Thanks, I'll figure out how to convert all that to metric and make an
order :D

> That should give you some parameters to start with.

Thanks a lot. This is a first-time project anyway so I'm allowed to
make some mistakes :D

hjf