RE: [CAD_CAM_EDM_DRO] Cutting/tool capacity of CNC-ed mini-Mill/Drill machines

JJ,

I have done some work with servo-controlled cutting.

I can monitor the current consumption in the spindle I have now, and change
the feed rates to stay within a power rating.

This can help prevent:
motor stall and subsequent smoke
tool overheating and aluminum melting

What I'm looking for now is either a pre-made spindle I can use with
appropriate speed for steel work, or a straightforward design that I stand
a chance of building myself.

From lurking on this list, it seems that many people have experience with
CNC-ing mill-drills, Sherlines, Taigs, and other small manual
machines. I'm hoping that someone has a recommendation.

I've been scouring manufacturers' sites, and have found them very short on
performance specifications, including statements like:
"This machine will make 0.375" deep cuts with a 0.5" end mill in
mild steel."
Probably I'm too green about machining to know how silly this questions
sounds, but how does one know what the capabilities of a converted machine
will be?

-- Carl

At 07:14 AM 11/8/2002 -0500, you wrote:

>How about a servo motor?
>
>Regards,
> JJ
>
>Be Kind, Be Careful, Be Yourself
> > For my next hexapod machine, I am looking for a better
> > spindle than I have
>...
> > It seems that CNC requires more reserve capacity than doing
> > work manually,
> > since the computer has no "feel" for the process. It isn't
> > listening to
> > the pitch of the motor, and compensating for a tool that may
> > be dulling, or
> > one that is clogged with chips.
>
>
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Carl Mikkelsen
Oasis Semiconductor, Inc.
201 Jones Road
Waltham, MA 02451
(781) 647 8775