Description

Design Features

• High torque output, direct-drive brushless servomotor

• Cog-free design for outstanding velocity stability

• Outstanding wobble and runout

• Direct coupled, high-accuracy rotary encoder

• Large diameter clear aperture

Aerotech’s ADRT series direct-drive rotary stages provide superior angular positioning and velocity control. Applications range from indexing to high-speed laser machining to precision wafer inspection.

Superior Mechanical Design

Dual large-diameter bearings are used to maximize performance with respect to wobble, moment stiffness and repeatability. The large diameter bearings permit large payloads without compromising performance.

Brushless Direct Drive

To maximize positioning performance, the ADRT series utilizes Aerotech’s S-series brushless, slotless motor. This motor has all of the advantages of a brushless direct-drive motor – no brushes to wear, no gear trains to maintain and high acceleration and high speeds. Since it is a slotless, ironless design, there is zero cogging, meaning that there is absolutely no torque ripple.

With its low inherent inertia and optimized motor design, the ADRT is capable of speeds and accelerations that are significantly higher than other competing products. These stages have a lower height profile compared to competing products within given torque ranges.

The low inertia and zero backlash make the ADRT the ideal solution for applications requiring frequent directional changes.

Accurate Positioning

Line counts range from 3600 to 5400 lines per revolution. When coupled with Aerotech’s MXH series resolution multipliers, resolutions can be as fine as 0.12 arc sec.

The motor and high-performance rotary encoder are directly coupled to a common shaft. The absence of gear trains and mechanical couplings means no position errors caused by hysteresis, windup or backlash.

Flexible Configurations

Options include a high-precision bearing for improved accuracy, smoothness and run-out performance. Slip rings and rotary unions are available to ease integration of custom tooling, and a holding brake is available to limit movement of the stage during large impulse loads or when power is removed from the motor.

The ADRT is equipped with "T-slots" integrated into the exterior housing. These slots can be used to mount the table horizontally or to attach custom application specific fixtures.

Aerotech manufactures a wide range of servo amplifiers and advanced controllers to provide a complete integrated package.

Specifications

ADRT Series Specifications

1. Bus voltage for ADRT100 with -25D connector is limited to 160 V.

2. Calibrated accuracy requires -PL2 option and Aerotech controls.

3. Repeatability and accuracy are dependent on encoder resolution. To achieve the listed specifications, encoder resolution must be 0.36 arc sec or less.

4. Specifications are for single-axis systems. Performance of multi-axis systems is payload and workpoint dependent. Consult factory for multi-axis or non-standard applications.

5. Moment load based on 5 year continuous rotation at 250 rpm with maximum axial load applied. Larger moment loads possible for low speed and/or low duty cycle applications. Consult Aerotech for additional information.

ADRT Series Specifications

1. Calibrated accuracy requires -PL2 option and Aerotech controls.

2. Repeatability and accuracy are dependent on encoder resolution. To achieve the listed specifications, encoder resolution must be 0.36 arc sec or less.

3. Specifications are for single-axis systems. Performance of multi-axis systems is payload and workpoint dependent. Consult factory for multi-axis or non-standard applications.

4. Moment load based on 5 year continuous rotation at 250 rpm with maximum axial load applied. Larger moment loads possible for low speed and/or low duty cycle applications. Consult Aerotech for additional information.

ADRT Maximum Speeds for Encoder Option

Dimensions

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Ordering Information

ADRT Mechanical-Bearing Direct-Drive Rotary Stage

Stage Height (Required)

Motor (Required)

1. Note: Only available for ADRT260.

Feedback (Required)

Connector (Required)

1. Note: Only available for ADRT100.

Rear Seal (Optional)

1. Note: Only available for ADRT100.

Air Purge (Optional)

1. Note: Only available for ADRT100.

Brake (Optional)

1. Note: Only available for the ADRT150 and the ADRT200. Not available with limited travel option.

Limited Travel (Optional)

1. Note: Not available with ADRT100. Not available with brake option.

2. -TRxxx options include electrical limits and mechanical hardstops. There are an extra 1.5 degrees per side between the nominal travel and the electrical limits, and an extra 5 degrees per side between the nominal travel and mechanical hardstops. (Ex: TR90 has +/- 45 degrees of nominal travel, with +/- 46.5 degrees of travel between electrical limits and +/- 50 degrees of travel between mechanical hardstops.)

Metrology (Required)

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.