These stages are suitable for applications where positioning needs to be automated. The drive mechanism consists of worm and gear assembly perfectly matched to minimize play and back-lash. There is an access hole through the center of the stage for illumination from underneath or for similar purposes. Radial play is eliminated by the use of preloaded thrust bearings using balls as rolling elements. Stepper motor is used as the electrical actuator and is connected to the worm. Shaft of the stepper motor is connected to a rotating knob for manual adjustments, when ever required.
Top surface of the stage is provided with tapped holes and base with counter bored holes for mounting. Standard stages are manufactured in aluminium alloy and finished by black anodizing. The stage can be manufactured in stainless steel and mild steel with the required finish.