What Jim states is correct and illustrates why it would not be necessary absolutely for the PMC8 to do anything at the meridian. The short answer to the question is no, the PMC8 driver does not do anything at meridian. That is left to the application in charge of scope motion and activity.
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired