Re: [CAD_CAM_EDM_DRO] Re: Lathe CNC retrofit

> But it all comes down to steps per. If they are microsteps, and there
> is enough power available to make each microstep "count", then
> steppers will work. Try thinking your tapers through, using step
> size. Then you will know the extent of any problem you may have. A
> microstepper will do some smoothing, a TRUE servo will do some also.
>
> But if you've got 2000 steps in diameter and 2 in the other dir, you
> are gonna see bumps,IMO. So it depends on what "shallow" taper
> means...

Microsteps are great for smoothing out motion, but should not be
counted on to have even distribution. So if you really had only a few
steps over a long distance, you probably would see some waviness.
It's probably better to use a timing belt reduction to make the real
step size small, or best of all to use a servo system with a fine
encoder resolution - which will be more even and lets you put the
encoder on the screw, eliminating any inconsistency in the reduction
drive.

Chris Stratton

-------------------------------------------------
Christopher C. Stratton
Engineer, Instrument Maker, and Horn Player
ccs@... 617 628 1062
http://web.mit.edu/~stratton/www/brassbuild.html