What is and when should I CALIBRATE MOTOR, CALIBRATE SENSORS, and TRAIN DRIVES?
A. CALIBRATE MOTOR should be done whenever the power source changes. So, swapping from internal batteries to an external source or vice versa. Also, when on batteries and the power level drops from usage, doing a CALIBRATE MOTOR will “retune” to the lower power level. CALIBRATE SENSORS (models with the LNT module) normally only needs to be done when you suspect a pointing error could be due to leveling or magnetic errors. It is also useful on first use to refine the “Magnetic Variation” for your location. TRAIN DRIVES should be done on first use and thereafter every few months. It should also be done after updating the AutoStar ROM. It should be done if you are seeing “rubberbanding” (which is when the AutoStar slews an object away from the center of the eyepiece FOV after you have manually centered it). Doing any or all of these on every session does not normally hurt (unless you make an error) but it is not necessary to get full enjoyment from your telescope.
