>try to figure the feedrate on 0.001" per revolution when plunging
>into the (you put the right material) pcb.
I've seen .002" per rev recommended elsewhere. But, because we're
talking short travel that means a high start velocity and high
acceleration. High start velocity can cause vibration which is a no-no
especially when the bit is in the board and the Z axis is changing
direction. The smaller the bit the more likely it'll fail.
--- In
Homebrew_PCBs@yahoogroups.com, "Zoran A. Scepanovic"
<zastos@...> wrote:
>