Re: Stepper size?

Smoke,
Thanks for that info, I didn't even think about that!

Another question, Why would you use steam instead of just heat to
remove the wax?
Would not the steam and additional moisture to the investment?

--- In CAD_CAM_EDM_DRO@y..., "Smoke" <smoke@t...> wrote:
> I can't provide any advise on the steppers but I can provide some on the
> machineable wax.
>
> I recently machined a test piece for a rifle action using the hard blue
> machinable wax available at most of the machine tools supply places. If
> your going to use your machined wax pattern for lost wax investment
casting,
> DO NOT use this type of wax!
>
> It melts at too high a temperature for lost wax casting. This
allows the
> wax to expand before it begins to burn out of the mold and causes
cracks in
> the mold, leading to a defective casting!
> Look for a low melting point machinable wax for your pattern. One that
> melts around 150 ° or so is ideal as that would allow you to steam
most of
> the wax from the shell before burnout and also allows you to reclaim
most of
> the wax.
>
> Smoke
>
>
> > I am in the process of designing my XYZ table. I am interested in
> > routing machinable wax for use with my casting furnace, light wood
> > routing and perhaps (light) engraving aluminum. Not very deep cuts in
> > the aluminum.
> >
> > I am trying to figure out a decent size stepper motor to use. I came
> > accross a few on the net in the 125 oz/in model, one is a Size 23
> > ($40)Vexta PK226-02A, 200 s/r 3.6v@2A
> > and the other is a Size 34 ($25 used)125oz 2.5v@2... 200 s/r(steps per
> > rev).
> >
> > My table is what will be moving, made out of 3/4" cabinet grade ply,
> > 24" * 30". What would be the recommended size based on my application?
> >
> > The over head gantry will house a Dewalt 1/4" laminat trimmer, not
> > much weight.
> >
> > Anybody have an opinion on these types of stepper or do you have
> > another source I could look at?
> >
> > Thanks.
> >
> >
> >
> >
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