Homebrew PCBs

--- ghidera2000 <ghidera2000@...> wrote:

> I want to try out a 0.005" stub endmill but I'm uncertain about 
> the feed speed to use. 

I use a Quickcircuit at work, and I've never had any luck running
stub endmills any smaller than 8 mils into 1oz board, no matter what 
the feed rate.  I usually try to route my boards to accomodate a
12 mil or larger bits, only running the 8 mil for those sections that 
absolutely need it like fine pitch part pads.  The 12 mil bit I run 
at 3 inches per minute, and the 8 mil at 1 inch per minute.  Perhaps 
someone else has tips on the science of how to properly feed these 
small end mills but this is what I've learned empirically.  

Mark B.
Albuquerque, NM