Spacecraft Mechanisms

Cryogenic Fine Positioning Linear Actuator

The Cryogenic Fine Positioning Actuator product is designed to produce
very small linear output steps using conventional actuator technology. Actuation is accomplished by using a small angle stepper motor coupled to a large gear reduction transmission. The linear excursion is accomplished with a fine leadscrew mechanism. This Linear Actuator offers the following features:

High resolution and accuracy
Redundant, 3-phase stepper motor
High gear ratio gear transmission
Sealed bellows assembly at the output
Drive components based on existing heritage hardware
Designed to operate in Cryogenic space environment
Pre loaded 2 piece output member

Specifications

Dimensions
1.4 in. diameter and < 6.6 in. length
Weight
< 1.2 lbs
Range of Travel
0.45 inch
Position Accuracy
47 micro inches over 7200 linear steps
Linear Resolution
17 micro-inches
Linear Velocity
0.0035 inch/sec (nominal)
Power Consumption
8 watts max.

Our extensive product offering of Linear Actuators are flexible and customizable to your specific needs. For more information on Linear Actuators, or this specific model please contact our Chatsworth facility.