AVR-Chat

--- In AVR-Chat@yahoogroups.com, Thomas Keller <tkeller1@n...> wrote:
> > The problem with the current small mills is that the motors are slow
> > speed, rarely over 6,000 RPM and certainly not up near 30,000 RPM
> > An entire mill head is available, but the motor is over 4 pounds, I'm
> > expecting my entire unit to weight less than one pound.
> 
>    I suspect you're crusing for trouble here, Dave.  There is a REASON
> those mill heads weigh 4 lbs.  It has to do with rigidity.
> 
>    A 1 lb mill head is going to be too light for any but the very
> lightest of cutting jobs.  You will have severe difficulty keeping your
> tool correctly aligned while aking cuts, because the millhead will be
> defelcting too far.  I would guess that you would even have trouble
> milling copper foil off of a circuit board blank with a 1 lb mill
> head,to be honest.   A 4 lb mill; head is extremely lightweight.
> 
> tom


I will be drilling with 1mm or less dia drills only for a 
PCB drilling machine.

I *may* try to rout out the boards after being drilled, but that may
not be dooable or even needed.

I could drill holes in each corner and jyst use them to align a shear,
or even leave a boarder trace and use that.

but this is a tiny driller.

Dave