RE: [CAD_CAM_EDM_DRO] Re: Something Old, Something New..Upgrading An Old CNC Millrite

Sweeeet!

The main difference I see between ballscrew and Acme is friction so you can
just keep the Acme screws and the 1,200 oz-in steppers to drive them. It
ain't broken...

Don't know what the power supply is -- I would rip out the control
electronics and use Geckos and a dedicated small PC running MACH3. You will
need to know the wiring on your steppers but this is a matter of ten minutes
with an ohmmeter. Any drive controller will have a maximum working voltage
so you may need to tweak the existing power supply.

This will make a very nice machine!
Dave

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of too_many_tools
> Sent: Sunday, July 30, 2006 11:36 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Something Old, Something
> New..Upgrading An Old CNC Millrite
>
>
> An update....after doing some digging I find that this CNC Millrite
> has 1200 oz/in STEPPERS...not servos like I thought...and they are
> wired for an open loop system,
>
> The feed rates for the machine were 0.75" to 24"/min.
>
> The 5 pitch ACME screws are speced at 0.001".
>
> The electronics are probably early to mid 70's.
>
> Now if you were going to update this machine (that has had only a few
> hours of usage), how would you go about it?
>
> Would you replace the steppers? If so, what size servos and where
> would you buy them?
>
> How about the ACME screws? If so, where would you go to buy the ball
> screws?
>
> I think the electronics except for the power supplies are well worth
> a replacement...any suggestions?
>
> Any other suggestions that apply to a small knee mill update?
>
> Thanks
>
> TMT
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "too_many_tools"
> <too_many_tools@...> wrote:
> >
> > Sometimes the Gods smile upon a person...I was just given a old CNC
> > Millrite. ;<)
> >
> > So now I (or perhaps I should say my son) has a summer "project" to
> > upgrade this Millrite from its old numerical controls to use the
> > current technology.
> >
> > The mill has Acme screws on the X and Y axises.
> >
> > The X and Y axises and the quill are equipped with servo motors
> that
> > I will want to reuse in the updated electronics conversion.
> >
> > I do have the old numerical control electronics that were used to
> > originally power the servos but will likely not reuse it except for
> > the cabinet.
> >
> > The spindle is powered by a three phase 1Hp motor.
> >
> > So if this was YOUR machine, how would you go about updating it?
> >
> > What hardware, software, what companies would you go with?
> >
> > I will also add that I searched the entire archives without finding
> > anything like this that has been done before so any contributions
> > that you might add will provide guidance for those who are looking
> > for insight in the future....and help me alot. ;<)
> >
> > Thanks for any contributions that you can add.
> >
> > TMT
> >
>
>
>
>
>
>
>
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