Re: mini-mill converson data

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:

>
>
> turbulatordude wrote:
>
> >Hi,
> >
> >I am looking for data on converting a mini-mill to steppers.
> >
> >can anyone offer some links ? or recomendations on stepper sizes ?
> >
> >I was thinking of starting with some NEM34's 150 in-oz because I

have

> >them and could always swap out for larger units.
> >
> >
> This is on the borderline of being too small, but might work OK,

depending

> on what you will be making.
>
> >Also, what is the best way to automate the Z axis ?
> >
> >
> I think the only right way is with an anti-backlash ballscrew

attached

> to the column, and driving the head directly. All attempts to use

the

> rack and pinion drive seem bound to have much backlash and

positioning

> errors.
>
> Jon

It does seem to be much more realible to do the the ballscrew. I saw
a site recently in passing about a guy who used Moglice to do the
column. seemed to fit well.

Dave