clock drive in a sentence

Examples

1. A telescope mounted on one of these mounts can be aimed at a celestial object and easily guided by either manual, slow-motion controls or by an electric clock drive ( standard on many high-end models running $ 1, 200 or more ).
2. I took a class a few years ago that taught me how to solve this problem, but essentially I would like to minimize the amount of time for each of these 4 routes and minimize the amount of " off the clock driving " I do.