Re: Plasma table gear reduction

<snip>

> 3) 3:1 reduction drive with 1" diam timing pulley
> 250 in oz torque 0.1 oz in sec^2 rotor inertia

<snip>

> So with the numbers I used you can see that there is a sweet spot

at about

> 3:1 to 5:1 where the peak torque required is minimum and a

reasonable and

> typical
> rotor inertia gives a good impedance match.
>
> This is not anywhere near the point where the motor delivers best

power or

> is
> most efficient. It is simply the point of best economy for your

design.

>
>
>
>
> Leslie M.Watts
> L M Watts Furniture
> http://www.lmwatts.com

Thanks Les,

dumb question, but is that power into the drive ? or do you also
divide the power by the ratio to get the motor power needed ?

I see is that a 1,000 RPM motor is the place to start. that would
offer something between 200 and 300 inch per minute rapids.

Thanks for your efforts to guide me straight.

Dave