I just talked to a supplier of steppermotors and servodrives. He recommended to use servomotors because it might be a problem to get uniform motion below 30rpm with a stepper motor. (one axis had to change speed from +30rpm to -30rpm within 2 hours, ratio of the planetary 50000:1, resolution...
Hi OperaHouse,
thanks for the tip! I already thought about using stepper motors but we experienced with another telescope control that the speed resolution wasn't good enough and we had to replace it by a dc motor.
Hello,
I want to use dc motors with planetary gears to drive two axes of a solar telescope as uniform as possible. One of them makes 0,5 turns within 12 hours, the other makes 0,25 turns within 6 hours and then returns to the starting point within the next 6 hours. At the other hand I need a...
