Here is a reply to my Question about PE controll for the DA1 from Astromeccanica.
Quote:
The DA1 has no PE control because we noticed there's no chinese mounting capable to perform a regular error after many worm gear laps. The PE with these mountings is regular within 2-3 laps only.
So we developed a very good autoguiding system through both the webcam and ST4 protocol in order to completely eliminate any periodic error and DEC drifts at the same time.
end quote:
Interesting so I wonder how the PE works on the Sky Scan or if the worms have been improved from the Standard
Another e-mail me thinks.