Re: [CAD_CAM_EDM_DRO] Epoxy Granite

There is a company called Etel which makes cogless linear motors but you
will have to provide scale feeback with 1 volt peak to peak sinewave which
Heidenhain makes I would go for the Metal scales and a Hardened CNC
controller to insure reliable operation. Like the MachineMate CNC which you
can use variables and formula's to control the servo's.

You can find Etel on the web search for Etel linear motors

Harko

On 2/23/06, Jack Hudler <yahoo@...> wrote:
>
> Harko! Thanks this is exactly what I'm looking for. Now that I've got
> spec's I
> can design this monster and see how much resin I'll need.
>
>
>
> I'll be turning a 2 meter mirror with two radiuses of curvature on it plus
> the
> secondary and if that's successful I'll be able to make any mirror I want.
> Actually I'll be testing a whole bunch of glass before I mount up $80000
> in
> glass.
>
> I need to reach at least 5ìm(micrometer) precision; making it out of resin
> will
> allow better temperature control with child water piping. The final polish
> to
> 1ìm (ë/2) or better will be done using traditional diamond lap methods.
>
>
>
> The only thing I need to find is a cogless linear drive that has a
> repeatability
> of 0.1ìm or 0.05ìm.
>
>
>
> Heck, I could even make a profit! J/K. But even if I end up with lathe
> that
> won't turn glass to the required finish, imagine the surface finish on
> metals!
>
>
>
> Wish me luck! And thanks for the help!
>
> Jack Hudler
>
> _____
>
> From: Harko Schwartz [mailto:ncmeinc@...]
> Sent: Thursday, February 23, 2006 1:54 PM
> To: Yahoo@...
> Subject: Re: [CAD_CAM_EDM_DRO] Epoxy Granite
>
>
>
> Hi Jack
>
> www.philadelphiaresins.com
> 130 Commerce Drive, Montgomeryville, PA 18936 USA
> Telephone 215.855.8450 Fax 215.855.4688
>
> This is the best one that I know of. You can do things like get close
> then use
> linear ways and put a release agent on the bottom of them to make the
> accurate
> base. I worked on a George Fisher lathe and they even made the spindle
> housing
> out of Epoxy Cement. There are many benefits to making the machine that
> way.
> Vibration will be dampened and the finish on the parts will be
> great. Most
> hardinge lathes have a granite base. Any other questions
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
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