Re: [CAD_CAM_EDM_DRO] Stepper size?

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@2.1A 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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