Re: Gecko 210s l- limited rapids

Torsten,

That is what I thought. The Geckos are supposed to go to at lease
40,000 steps per second. The motors are 4500 rpm rated but the
phase current amps unipolar 9.0 and bipolar 12.7

Keith Clark

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Torsten" <torsten@g...>
wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "theokspindoctor"

<mail@t...>

> wrote:
> > Sigma motor, 9 amp, Gecko 210 set at 200 steps per revolution

with

> 7
> > amp max power. Motors wired in half winding mode. There is no
> > excess mechanical load. Power supply 75 volt 16 amp. 2:1

reduction

> > with 5 pitch lead screw. Using Galil motion control board.

Still

> > only about 30 ipm maximum before stalling.
> >
> > Everything seems to be working fine at lower speeds. How can I
> > pursue the possibility of getting some better axis motor speeds
> from
> > these drives?
> >
> > I expected even greater rapids than the 100ipm the Boss 6 had
> before
> > the retrofit, according the sales pitch I was given...
> >
>
> 30ipm x 5 pitch leadscrew = 150 x 2/1 ratio = 300 rpm on the motor
> 300 rpm x 200 steps per rev.= 60 000 steps per minute / 60 seconds
> = 1000 steps per sec or 1k steps.
> this is far less then the gecko's are capable of.
> what is the rated rpm of these motors?