ZFS25B ThorLabs Stepper Motor Actuator

The ThorLabs ZFS Series Stepper Motor Actuators are high-resolution motorized actuators for use in high precision applications. The compact, 'folded' stepper motor design is aimed at customers whose priority is minimal length protruding from their Optimech and applications where the centre of gravity should be close to the contact point.

From drop-in replacements to custom mounts, these motorized actuators will satisfy even the most demanding requirements. Three different travel lengths are manufactured: 6.0 mm, 13.0 mm, and 25.0 mm.

The ZFS13B and ZFS25B actuators are ready for use with a 3/8" barrel mount. The ZFS6 and ZFS13 actuators thread into a 1/4" -80 mounting bush.

The ZFS series Motorized Actuators use a stepper motor that provides sufficient torque for high load capabilities. The actuators allow very small step sizes over the entire travel range, delivering greater flexibility with negligible backlash and fine resolution. The design incorporates a 44:1 gear reduction head which, when combined with the 49,152 microsteps per revolution offered by the KST201 stepper motor driver gives a theoretical travel per microstep of 0.46 nm. The stepper motor allows for continuously variable speeds and the actuators use integrated hard stops that automatically cut the power when they have reached their mechanical limits.

The ZFS series Motorized Actuators are light, compact, and extremely durable. They are ideal for use in mirror mounts, translation stages, microscopes, OEM applications, and a wide variety of other components that require higher precision than most standard drive mechanisms allow.