ADRS Mechanical-Bearing Direct-Drive Rotary Stage


Design Features

  • High torque output, direct-drive brushless servomotor
  • Cog-free slotless motor design for outstanding velocity stability
  • Direct coupled, high-accuracy rotary encoder
  • Ultra-low-profile minimizes working height

Aerotech's ADRS series with its direct-drive technology and low profile provide a superior alternative to belt- and worm-drive stages.

Compact Package

The design of the ADRS series direct-drive rotary stage was optimized to minimize stage height. The low profile of the stage reduces the effective working height of the system, minimizing “stack-up” related errors. In addition to the low overall height, the ADRS series provides a clear aperture that can be used for product feed-through or laser beam delivery.

Brushless Direct-Drive

To maximize positioning performance, the ADRS series utilizes direct-drive brushless motor technology. Direct-drive technology is optimized for 24/7 production environments as there are no brushes to replace and no gear trains or belts to maintain. Direct drive also provides quicker acceleration and higher top speeds than gear- or belt-driven mechanisms, yielding higher total overall throughput.

The low maintenance and high-throughput characteristics of the ADRS series provide a stage that yields the lowest total cost of ownership.

Slotless Motor

The ADRS series uses a slotless stator design that eliminates torque ripple. This motor technology provides ultra-smooth velocity stability comparable to a high-quality DC brush motor without all the DC motor’s inherent maintenance requirements. Since the slotless motor is directly coupled to the tabletop, velocity disturbances created by toothed belt drives or worm gears are eliminated.

Multiple Configurations

The ADRS series is available in 100 mm, 150 mm and 200 mm versions. Each stage has options for different motor windings to better match the stage to different operating conditions. The -B winding option provides the highest possible speed operation for a given available bus voltage, while the -A winding gives greater output torque for comparable current levels. Metric and “English” pattern tabletops are available and slotted mounting holes enable attachment to 25 mm and 1-inch hole pattern breadboards. The tabletop of the ADRS series has a labyrinth seal that protects the bearings and encoder from contamination. An optional shaft end-seal is available for applications where the bottom of the stage is exposed to contamination.


ADRS Series Specifications

Tabletop Diameter 95 mm 140 mm 190 mm
Aperture 6 mm 15 mm 26 mm
Bus Voltage 340 VDC
Maximum Torque (Continuous) 0.48 N·m 2.36 N·m 5.99 N·m
Max Speed(1) 1500 rpm 600 rpm 600 rpm
Accuracy(2) Uncalibrated 388 µrad (80 arc sec)
Calibrated(3) 29.1 µrad (6 arc sec)
Repeatability(2) 14.6 µrad (3 arc sec)
Max Load(4) Axial 7 kg 20 kg 40 kg
Radial 3 kg 10 kg 20 kg
Axial Error Motion(5) 2 µm 5 µm 5 µm
Radial Error Motion(5) 3 µm 5 µm 5 µm
Tilt Error Motion 48.5 µrad (10 arc sec)
Inertia Unloaded 0.00038 kg-m2 0.00242 kg-m2 0.00843 kg-m2
Total Mass 2.0 kg 4.3 kg 7.6 kg
Finish Tabletop Hardcoat
Stage Black Anodize
  1. Maximum speed is based on stage capability. Actual speed may depend on encoder resolution, load, amplifier bus voltage and motor. See the S-series rotary motor for more information.
  2. Repeatability and accuracy are dependent on encoder resolution. To achieve the listed specifications, encoder resolution must be 0.36 arc sec or finer.
  3. With -PL2 option.
  4. Maximum loads are mutually exclusive.
  5. For the ADRS-100, error motion specifications are below 700 rpm. Above 700 rpm the max radial error is 5 microns. Errors measured 25 mm above the tabletop.

ADRS Maximum Speeds for Encoder Option

Encoder OptionADRS100ADRS150ADRS200
-E1/-E2/-E3/-E4 1500 rpm 600 rpm 600 rpm
-E5 800 rpm 300 rpm 300 rpm
  • Axial and Radial Cantilevered Load Capability (ADRS100)
  • Axial and Radial Cantilevered Load Capability (ADRS200)


Ordering Information

ADRS Mechanical-Bearing Direct-Drive Rotary Stage

ADRS100 ADRS100 mechanical-bearing direct-drive rotary stage
ADRS150 ADRS150 mechanical-bearing direct-drive rotary stage
ADRS200 ADRS200 mechanical-bearing direct-drive rotary stage

Feedback (Required)

-E1 Incremental encoder, 1 Vpp
-E2 Incremental encoder, TTL, x5 interpolation
-E3 Incremental encoder, TTL, x10 interpolation
-E4 Incremental encoder, TTL, x25 interpolation
-E5 Incremental encoder, TTL, x50 interpolation

Motor (Required)

-M1 Low current, -A winding
-M2 Low voltage, -B winding

Tabletop (Required)

-TT1 Metric tabletop
-TT2 English tabletop

Lower Seal (Optional)

- No lower seal
-SL Rear seal
    Note: Lower Seal not available for the ADRS100

Metrology (Required)

-PL1 Metrology, uncalibrated with performance plots
-PL2 Metrology, calibrated (HALAR) with performance plots

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.

-TAS Integration - 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.
-TAC Integration - 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.