3. Optics

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3.3 Servosystems Specifications

Azimuth drive

Units

Value

Kinematics Angular travel () 540
Angular velocity (/sec) 0.8
Angular acceleration (/sec2) 0.82
Configuration Number of wheels (-) 4
Driving wheels (-) 2
Drives per wheel (-) 1
Track Diameter (m) 18.3

Tab. 3.1 : Azimuth drive

Elevation drive

Units

Value

Kinematics

Angular travel () 90
Angular velocity (/sec) 0.5
Angular acceleration (/sec2) 0.31

Tab. 3.2 : Elevation Drive

Primary focus feed positioner Units Value

Kinematics

Linear travel (mm) 420
Linear velocity (mm/sec) 7.2
Linear acceleration (mm/sec2) 24

Tab. 3.3 : Primary focus feed positioner, transverse axis

Primary focus feed positioner z axis

Units

Value

Kinematics

Linear travel (mm) 350
Linear velocity (mm/sec) 7.2
Linear acceleration (mm/sec2) 24

Tab. 3.4 : Primary focus feed positioner, z axis

Sub-reflector Units Value

Kinematics

Linear travel x axis (mm) 160
Linear travel y axis (mm) 160
Linear travel y axis out of focus (mm) 2240
Linear travel z axis (mm) 250
Angular travel x axis () 4.2*
Angular travel y axis () 4.2*
Linear velocity x axis (mm/sec) 55.5
Linear velocity y axis (mm/sec) 17.1
Linear velocity z axis (mm/sec) 48.3
Angular velocity (/sec) 1.9

Tab. 3.5 : Sub-reflector kinematics

*From the central feed.

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