[Wavytone]

This isn't a helpful solution. The website also shows the author has a very naiive understanding of the causes of tracking errors.

- it assumes a stellar rate only, it makes no provision for lunar or solar rates; most good drive correctors from 30 years ago could do that;

- it doesn't have any ability to track in declination, ie it is not able to cope with a mount that is not perfectly aligned with the pole. The effects of refraction mean it is impossible to eliminate the need for declination tracking at all parts of the sky. This alone makes it useless as to solve this you will have to use another drive corrector for declination;

- it has no capability for fine adjustments even in RA. Which also makes it useless.

- it makes no corrections for geometric errors in the mount (angles that are not perfect right-angles);

- it makes no corrections for atmospheric refraction;

- it makes no corection for the flexure of the mount and telescope assembly - which may change during an exporure if these are cooling or warming;

- there is no adequate explanation as to how it compensates for periodic errors in the geartrain.

It might be adequate for driving an equatorial platform for a Dob being used visually, or perhaps a small mount with a piggyback camera with a short lens taking short exposures of a few minutes, but thats about all.

A closed-loop feedback system (autoguider) solves all of the above.