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The motors on the standard GM-8 and G-11 are stepper motors, with the Gemini they are servo motors with an optical disc attached so the Gemini can read it's location in the sky and GOTO other objects, they also have a different gearbox. Stepper motors can only read their location in the sky if they are fitted with Digital Setting Circles (DSC) and go through an Argo Navis or similar.
If you are not aware, the GM-8 now comes with a 'D' series saddle, this makes GM-8, G-11 and Titan all compatable and so allow the interchange of OTA's without changing Dovetail Plates.
Cheers
JohnG
Last edited by JohnG; 06-08-2006 at 09:59 AM.
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