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Subject: Re: Kids in exchange of 16 "
From: Robert Fields
Reply To: mapug@shore.net
Date: Sat Apr 08 05:48:57 1995

Mogens:

The attached two questions lead me to believe that you may be misunderstanding the RA smart drive. The RA training and the DEC training are quite different. The DEC training does train out drift, as you suggest. The RA "learn" mode, available on the smaller LX200s, trains around periodic errors in the worm gear. The RA learn mode does not do anything for drift.

-Robert

>
> 3. Why is the smart drive on these 16 " SCT-s closed to the user ?
>
> Smaller instruments have the possibility of RA-learn, but the 16 " does not
> have this feature, not even in polar mode.
>
> If this smart drive feature RA learn had been open to user, as it is on cheaper
> telescopes, we would have solved the problem ourself.
>
> I expect the combination of RA learn and CCD, and our problem would easily
> correct this drift during one single autoguide run.
>
>
> 4. The DEC learn is present on the 16 ", but the RA learn was not. Are there
> any plans involving this RA-learn feature -present on simple telescopes- on the
> 16 " too ?
>
>