I was reading Telescope drive tracking accuracy
http://arnholm.org/astro/tracking/index.htm and I wondered how many folk have checked the accuracy of their RA motors?
I guess you calculate expected rotation rate 86,164 seconds / teeth on drive motor to get the target rotation speed - draw a line on the gear then measure it over a few hours and spot how much error you have - and work out if there is a way to correct for motors that are too fast or slow.
Has anyone done much research into this? Has anyone determined if there motors are a tad fast or slow and better yet - found a utility to counter any specific error?