Stepper motors convert electricity into rotation. And it can be very accurately controlled in terms of how far it will rotate and how fast. Step motors are so named because each pulse of electricity....
@ Total Station Topcon Total Station Topcon GTS 255 Total Station Topcon ES-105 Total Station Cygnus KS-102 @ Digital Theodolite Topcon Digital Theodolite Topcon DT-205 Digital Theodolite....