Re: CNC Rotary table resolution

Hi Mark,

Which rotary table do you have?

I have the new Sherline with CNC mount, it has 72:1 gearing, and with a
200 step motor running in 1/2 step mode, I get 28800 steps/rev. That's
80 steps per degree, or .0125 of a degree resolution! So for your 1"
dia gear, something like .0001091" per step. etc.

Alan KM6VV

Mark Fraser wrote:

>
> The Sherline rotary table's 40:1 gearing, with a 200 step motor yields
> 8000 steps per rev. This translates, on a 1-inch diameter
> gear, to .000393 inches per step, or, a little more than
> 2 steps per thou, or 5, half steps per thou. For my clock stuff, I
> think that'll be as accurate as the runout, at least on my lathe
> <grin> /mark
>