Quote:
Originally Posted by tempestwizz
Thanks for the replies so far. The main technical difference seems to be pushing vs pulling, which for me is no big deal.
I will be mounted on a permanent pier.
I note no-one has comments on the practical performance difference between the Gemini motors, and the standard steppers.
My anticipated costs are about AUD$4k for the G-11, and $1.5k for the Gemini, or $1K for the AN.
Thanks Brian.
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The standard G-11/GM-8 uses Stepper Motors, they are, just that, stepper motors, they move a tiny step at a time, with my mounts (G-11 and GM-8) I did not notice any apparant high magnification vibration caused by the steppers, PE, yes, but that was addressed by the use of the new High Precision worm. The Gemini uses high torque servo motors which deliver a smooth, non stepping, constant rate to the drive shaft, you can now order the G-11 (with Gemini) with the new Maxxon motor's which are a step above the standard servo's and, therefor, give a smoother drive rate.
Your case, using the TeleVue for imaging, I doubt very much it would make all that much difference, start using a larger instrument with a longer focal length, I would be using the servo's.
Cheers