Re: Gearhead motors ? future drives ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor" <vrsculptor@h...>
wrote:

> > Granted that some people might want more than 1,350 RPM on a stepper,
> > but in that range, power is fading.
>
> Dave,
> Step direction servos (g320) with fine encoder resolution need a whole
> lot more pulses per second than a PC can supply to move a table at 200-
> 300 IPM. My retrofitted mills servos need 20K steps per inch. My max
> rate with Mach3 is currently around 120 IPM. Original spec was 200.
>
> There is a need for higher pulse rates.
>
> Roger

I thought the step multiplier handled that problem ?

if you have 20,000 steps per inch, and did a 10x, you would have 2,000
steps per inch and I assume little difference in accuracy.

Lower encoder resolution will also decrease the steps per inch.

But, I agree that there is a need to fit in some of the blank spots
and that is why new stuff is offered.

but, I would submit that there is something you could do to keep high
accuracy and increase speed.

A great thing about the newer stuff is that you don't have to futz so
much with selection encoder resolution and all that.

Dave