Re: [CAD_CAM_EDM_DRO] stepper motor vs servo motor (and other assorted oddities)

I don't think you're going to find that kind of accuracy/power in a direct
coupling without paying _really_ big bucks. There's all sorts of lash-ups, but
my guess is you'll get the best results with a cog-wheel/timing belt situation.
YMMV.

Bill

On Wed Nov 27 06:41:06 2002, Bevan Weiss, <kaizen__@...> wrote:

>I've been thinking alot recently about creating my own CNC mill
>(multipurpose is the plan). I've got some ideas about the mechanical
>construction (although some links to ideas concerning ways to make a large
>chassis stiffer would be appreciated), however I'm at a loss as to what kind
>of drive system to use. I would like direct coupling of the motor to a
>ground ball screw (which in turn drives each axis etc), however I don't know
>what kind of motor I should be looking for. I'd like for the finished mill
>to be highly versatile. Anything from a very high resolution
>(repeatability) 1mil PCB design (10cmx10cm), up to an IC (Internal
>Combustion) type cylinder bore (with the same level of precision would be
>super nice). I realise that this is asking for everything, ie power (to
>tool metal, aluminium) and also speed and accuracy for the PCB milling,
>however any pointers would be greatly appreciated, I haven't been able to
>find much at all on Servo motors.
>
>Thanks,
>Bevan Weiss

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