Your going to need reductions to drive the mount weather servo or steeper.
What are you driving a friction drive or worm gears drive?
What ratios are you using?
Check out this site and the links on driving a scope.
http://www.bbastrodesigns.com/cot/cot.html
You don't need to have go-to but there is lots of info on basic motor drives from the MB site and suppiers of motors gears ect .
I use the servo controller and pittman motors on my large fork mount with 2200:1 total reduction and these motors can drive up to a 40"scope.
The steeper set up is cheaper and in kit form but the servo is more versatile when used on bigger scopes.
friction drives are the cheapest drive to use and offer a lot of benifits over worm wheel drives but have to be designed carefully to avoid slippage.
In driving a mount you have lots of variables to consider as far as tracking and correction of Ra drive rates ratios ect ect.
It's not just a case of wacking a motor on and hope for the best .
Mark
Mark
Mark.