Design Features

Aerotech's ANT20G goniometers represent a significant breakthrough in the high-accuracy angular alignment of components. This unique design utilizes Aerotech's best-in-class direct-drive noncontact motor technology. When used with Aerotech's controllers, the ANT20G series provides an industry-leading positioning speed of 150 degrees per second.

High-precision bearings, direct on-axis encoder feedback and noncontact and noncogging direct-drive technology ensure the highest level of performance and make excellent repeatability and in-position stability a reality. The goniometer cradles can be mounted orthogonally to provide pitch and roll about the same point in space. Combining this with a rotary stage under the orthogonal assembly adds a third rotation axis (pitch, roll, yaw) through the same point.

The critical elements of the ANT20G goniometers, as with all other ANT series nanopositioners, were selected to operate in a 24/7 manufacturing environment. Unlike worm- or piezo-driven goniometers, the ANT20G series will not require periodic adjustment or maintenance. This will ensure many years of trouble-free operation. The ANT20G cradles are available in four sizes.

Specifications

Mechanical Specifications

ModelANT20G-050ANT20G-090
Rotation Angle20°20°
Accuracy(1)±90 µrad (±18 arc sec)±50 µrad (±10 arc sec)
Resolution (Minimum Incremental Motion)0.25 µrad (0.05 arc sec)0.25 µrad (0.05 arc sec)
Bidirectional Repeatability(1)±18 µrad (±4 arc sec)±10 µrad (±2 arc sec)
Unidirectional Repeatability±5 µrad (±1 arc sec)±5 µrad (±1 arc sec)
Tilt Error Motion±90 µrad (±18 arc sec)±50 µrad (±10 arc sec)
Maximum Speed150 degrees per second
Maximum Acceleration1200 rad/s2500 rad/s2
Settling TimeSee graph for typical performance
In-Position Stability(2)±0.4 µrad (±0.08 arc sec)±0.2 µrad (±0.04 arc sec)
Nominal Radius of Rotation50 mm90 mm
Height from Tabletop to Rotation Point19.1 mm57.5 mm
Maximum Torque (Continuous)0.40 N-m0.85 N-m
Load CapacityAxial1.5 kg2.0 kg
Moment60 kg-mm80 kg-mm
Stage Mass0.55 kg1.1 kg
MaterialAluminum
MTBF (Mean Time Between Failure)30,000 Hours

  1. Certified with each stage.

  2. In-Position Jitter listing is 3 sigma value.

  3. Specifications are per axis, measured at the rotation point. Performance of multi-axis systems is payload and workpoint dependent. Consult factory for multi-axis or non-standard applications.

Mechanical Specifications

ModelANT20G-110ANT20G-160
Rotation Angle20°20°
Accuracy(1)±40 µrad (±8 arc sec)±30 µrad (±6 arc sec)
Resolution (Minimum Incremental Motion)0.25 µrad (0.05 arc sec)0.25 µrad (0.05 arc sec)
Bidirectional Repeatability(1)±10 µrad (±2 arc sec)±10 µrad (±2 arc sec)
Unidirectional Repeatability±5 µrad (±1 arc sec)±5 µrad (±1 arc sec)
Tilt Error Motion±40 µrad (±8 arc sec)±30 µrad (±6 arc sec)
Maximum Speed150 degrees per second
Maximum Acceleration375 rad/s2250 rad/s2
Settling TimeSee graph for typical performance
In-Position Stability(2)±0.2 µrad (±0.04 arc sec)±0.15 µrad (±0.03 arc sec)
Nominal Radius of Rotation110 mm160 mm
Height from Tabletop to Rotation Point76.2 mm120.4 mm
Maximum Torque (Continuous)1.00 N-m2.40 N-m
Load CapacityAxial2.0 kg3.5 kg
Moment80 kg-mm140 kg-mm
Stage Mass1.2 kg1.6 kg
MaterialAluminum
MTBF (Mean Time Between Failure)30,000 Hours

  1. Certified with each stage.

  2. In-Position Jitter listing is 3 sigma value.

  3. Specifications are per axis, measured at the rotation point. Performance of multi-axis systems is payload and workpoint dependent. Consult factory for multi-axis or non-standard applications.

Electrical Specifications

Drive SystemSlotless, Brushless, Direct Drive
FeedbackNoncontact Encoder
Maximum Bus Voltage±40 VDC
Limit Switches5 V, Normally Closed
Home SwitchNear Center

Recommended Controller

Multi-AxisA3200Npaq MXR 
Npaq MR-MXH 
Ndrive ML-MXH
EnsembleEpaq MXH 
Epaq MR-MXH 
Ensemble ML-MXH
Single AxisSoloistSoloist ML-MXH

  1. Linear amplifiers are required to achieve the listed specifications. Other options are available.

Dimensions

Ordering Information

ANT20G Single-Axis Direct-Drive Nanopositioning Goniometer

Radius of Rotation (Required)

OptionDescription
-05050 mm radius of rotation
-09090 mm radius of rotation
-110110 mm radius of rotation, limits
-160160 mm radius of rotation, limits

Metrology (Required)

OptionDescription
-PL1Base performance
-PL2High-accuracy performance, PLUS

Integration (Required)

Aerotech offers both standard and custom integration services to help you get your system fully operational as quickly as possible. The following standard integration options are available for this system. Please consult Aerotech if you are unsure what level of integration is required, or if you desire custom integration support with your system.
-TASIntegration - Test as system 
Testing, integration, and documentation of a group of components as a complete system that will be used together (ex: drive, controller, and stage). This includes parameter file generation, system tuning, and documentation of the system configuration.
-TACIntegration - Test as components 
Testing and integration of individual items as discrete components that ship together. This is typically used for spare parts, replacement parts, or items that will not be used together. These components may or may not be part of a larger system.

Accessories (to be ordered as separate line item)

OptionDescription
ALIGN-PA10XY assembly; 10 arc sec orthogonality
ALIGN-PA5XY assembly; 5 arc sec orthogonality