Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Thanks much for the high-speed spindle answers guys!

Stefan, you said the 30eur micromot was 'much better'
than the 100eur IB-E ?? In what way?

Chris, sorry, but what are "skete" bearings? <g>

I guess when I asked about high-speed spindles, I was
thinking more in terms of 60krpm...a more proper speed
for .015-.030 carbide drills.

Dremels, even in a CNC machine, seem to break bit
once in a while for no apparent cause...and I'm thinking
it has a lot to do with both sloppy bearings and too low
a speed.

It seems that any fluctuation in feed-rate, play in the Z-axis,
or variation in board material, might be making the bit
take far too big a chip-load for the low 30krpm speed.

Just a theory... <g>

Is anyone using anything above 30krpm? Which ones,
and what did they cost?

my thanks again,

Richard
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