Re: CNC Converting Questions

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

> I have a minimill that I converted with size 34 steppers (I already

had

> them)
> and Gecko 201A drives. I can run it at 90 IPM with this setup,

which is

> plenty. I use 1:1 belt drive. I did have to modify the Y axis

bracket to

> put opposed ball bearings into it. I don't know why they put ball

bearings

> in the X bracket, but sleeve in the Y. Servos become much more
> attractive for the
> larger machines. They give more power over a wider speed range

than

> steppers,
> and can also deliver higher speeds. Who needs 400 IPM on a machine

with

> only 12" of travel?
>
> Jon

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I have a CNC'd minimill with direct drive to the stock leadscrews
w/ball thrust bearings on all axis, and 424oz/in size 34 steppers.
I'm not getting close to the rapids speed you mentioned, so I
wondered what voltage the Geckos are running at and what you used for
leadscrews? I've got a 3.5 amp 24 volt microstepping driver, and the
steppers are peaking out at 35 ipm.