Re: [CAD_CAM_EDM_DRO] How do you compare steppers to servos

More like 10.000 counts to 300.000 counts.
They position more accurately, thus they are more accurate.
Even very basic servos position to well better than 1/1000 of a
revolution, upto very much better depending on how much you spend, I
suppose.

Using a servo on a lathe will absolutely deliver more accuracy, to
about 1 micron levels.
Whether one can use or need that, depends.
For me, with lathes, absolutely yes.

Whether you can use the accuracy is another matter, as I said re: mill.
A mill is limited to about 0.01 mm, so improving the (actual) resolution
is useless.

> How are servos 'more accurate'? It makes no difference if you have
> 1500 CPR
> encoders with a high theoretical resolution as the actual 'accuracy' is a
> function of the entire system (screws, frame, etc.)
>
> Jeff Birt
>

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