Homebrew PCBs

On Wed, 16 Aug 2006 20:40:48 +0200, derekhawkins <eldata@...> wrote:

>> There is a bit of slop in the
>> bearings, but I don't break too many bits.
>
> I broke a .031" carbide bit yesterday trying to drill at a Z axis
> feedrate of 100 IPM and 30K RPM. Broke another this morning at 50 IPM,
> finally settled on 25 IPM. Vibration, runout, feedrate, RPM, material
> and bit size are typical suitability determinants.
>
<some snips and snippets>



WOW WHAT SPEED!

try to figure the feedrate on 0.001" per revolution when plunging into the  
(you put the right material) pcb.

-- 
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Zoran A. Scepanovic
zastos@...