HURRAY!!!! It Works. Thanks for the advise.

Steps I did to get it to work.
1. setup autostar to DS2090 and found ratios of
RA= .840568
Dec- 1.155000
2. Counted the teeth on the old gears
RA=83
DEC=66
3. Divided the ratio by the teeth and then multiplied the result by 144
(assuming the RA and DEC of the SP mount both have 144 teeth). Came up with RA
Ratio of 1.458334 and DEC ration of 2.52000.
4. Set autostar to scope type of Meade EQ114 and entered ratios and calibrated.

Have not test under the stars yet but intial test under florecent light was very
promising. :)

One more question
I have coupled the motors to the mount using LXD55 spur gears. will this further
change the ratio?

dennis


--- In RoboScope@yahoogroups.com, "George Cushing" <pinyachta@...> wrote:
>
> The DS2K motors are the same as the drives used in the ETX60, 70 and 80
refractors. I think they have a different final reduction than the DS motors. So
you can start with the Autostar's ratios for those models and calculate back
from the number of teeth on the worm wheels.
>
> We know the RA ratio gives us 1 RPD. The RA gear has 66 teeth, so the drive is
running 0.045833 RPM (66/1440) or 2.75 RPH.
>
> Believe the AS lets you setup the ETXs in equatorial position while the DS2K
settings will not.
> HTH, Geo.
>
> --- In RoboScope@yahoogroups.com, "ccs_hello" <ccshello@> wrote:
> >
> > Dennis,
> >
> > Need to figure out DS2000 motor's gearbox ratio first,
> > then please see this file "RatioFormula- variable Spur Gear" under Files
folder to figure out the correct ratio.
> > BTW, are you using the original GP or GP-DX?
> >
> > ccs_hello
>