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Ordering Info



Path 7




Ordering Info



Design Features

  • Provides ultra-precise rotary motion with accuracy to 1.5 arc sec & repeatability to 0.5 arc sec, plus outstanding geometric performance
  • Achieves extremely smooth motion with brushless, cogless direct-drive motors
  • Attains high speeds up to 1500 rpm, with excellent bandwidth for aggressive motion profiles
  • Offers substantial load capacity to 250 kg & supports loads in multiple orientations
  • Provides payload security & minimizes collision risk with available holding brake & limited travel options
  • Configurable with high-resolution incremental or absolute encoders

Key Applications

APR stages are ideal for advanced applications that demand excellent positioning performance, highly dynamic motion with outstanding tracking accuracy, large payloads and more, including:

  • Single-axis & multi-axis electro-optic sensor testing
  • Inertial navigation device qualification
  • Missile seeker testing & antenna testing
  • Optical calibration systems
  • Metrology systems
  • Azimuth/Elevation & Azimuth/Roll pointing & tracking systems


The APR stages are perfect for rotary testing, pointing, optical calibration systems and metrology systems. Several more specific applications include single and multi-axis electro-optic sensor testing, resolver or optical encoder accuracy testing, missile seeker testing, antenna testing, inertial navigation device testing, photonic component alignment, high-accuracy laser machining and precision wafer inspection. Multiple APR stages can be combined for high-accuracy azimuth/elevation or azimuth/roll systems. Vacuum-prepared and other customized versions are also available for specialized applications.

Accurate Positioning with Incremental or Absolute Encoders

The APR provides the flexibility of using high-resolution absolute or incremental optical encoders. The absolute encoder option allows instant initialization at the time of power up and eliminates the need for a home cycle. Incremental encoders are available for a cost-effective, accurate, high resolution, high dynamic performance stage. Both incremental and absolute encoders provide exceptional accuracy and fine stepping capability. The APR stages are available with high-accuracy encoder options. In addition, calibration can be employed to further improve the accuracy of all APR stages.

Low Total Indicator Runout (TIR) Mounting Surfaces

On standard APR stages, the payload is mounted directly to the precision-ground stage shaft via an eight-bolt hole pattern on the top of the shaft. The top surface and the aperture of the shaft are precision–machined for minimal surface runout with respect to stage motion. Precision-ground tabletop options provide more traditional metric or English hole-patterns while maintaining low surface runout of the tabletop mounting surface and aperture.

High Speed, High Bandwidth

Rapid acceleration and high velocity are key features of the APR stages. Customers can command rapid incremental or continuous rotary motion with the high-torque brushless motors in the APRs. Due to the direct-drive motor and the stage’s high stiffness, the APR can provide high-bandwidth motion for oscillations, motion profiling and rapid position or velocity tracking.

Brushless Direct-Drive

To maximize positioning performance, the APR series utilizes Aerotech’s brushless, slotless motors. Various winding options and motor stack heights are available for applications ranging from high-speed at a low input voltage or low current to high torque at a higher voltage. The motors are noncontact, so there are no brushes or gears to maintain. This allows the APR stages to provide many years of high performance operation with low cost of ownership. The motor’s slotless, ironless construction features almost zero cogging (torque ripple). This makes the APR ideal for applications requiring outstanding contoured motion, smooth scan velocity and precision motion profiling.

High Load Capacity and Large Moment Stiffness

Sturdy stage construction and separated angular contact bearings result in large load capacity and high moment stiffness for the APR stages. The APRs can excel in applications where the rotation axis is parallel or perpendicular to gravity and the payload center of gravity is cantilevered away from the stage.

Flexible Controller Configurations

Aerotech designs and manufactures a wide range of servo amplifiers and advanced controllers to provide a complete, integrated electro-mechanical package. Aerotech linear amplifiers provide the most precise positioning for demanding accuracy and in-position stability. Aerotech PWM digital drives provide high power for rapid acceleration and high torque applications. Whatever your application, Aerotech can provide a complete motion system solution to perfectly match your requirements.

Max Speed (rpm) Per Encoder Bandwidth

-E2, -E5
-E3, -E6
APR100DR Motor Limited Motor Limited 147 18
APR150DR Motor Limited Motor Limited 118 11
APR200DR Motor Limited Motor Limited 82 8
APR260DR 375 375 59 5






Ordering Information

APR High-Precision Mechanical Bearing Rotary Stage

Option Description
APR100DR-095 APR100DR-095 high-precision mechanical bearing rotary stage
APR100DR-145 APR100DR-145 high-precision mechanical bearing rotary stage
APR150DR-115 APR150DR-115 high-precision mechanical bearing rotary stage
APR150DR-135 APR150DR-135 high-precision mechanical bearing rotary stage
APR150DR-180 APR150DR-180 high-precision mechanical bearing rotary stage
APR200DR-155 APR200DR-155 high-precision mechanical bearing rotary stage
APR200DR-185 APR200DR-185 high-precision mechanical bearing rotary stage
APR260DR-160 APR260DR-160 high-precision mechanical bearing rotary stage
APR260DR-180 APR260DR-180 high-precision mechanical bearing rotary stage

Feedback (Required)

Option Description
-E1 Incremental encoder, 1Vpp
-E2 Incremental encoder, Digital RS422, x1000 interpolation
-E3 Incremental encoder, Digital RS422, x10000 interpolation (APR150DR, APR200DR, APR260DR); x8000 interpolation (APR100DR)
-E4 Absolute encoder
-E5 High-accuracy incremental encoder, Digital RS422, x1000 interpolation
-E6 High-accuracy incremental encoder, Digital RS422, x10000 interpolation
(APR150DR, APR200DR, APR260DR); x8000 interpolation (APR100DR)
  1. -E5 and -E6 options are not available with APR150DR-115.

Motor (Required)

Option Description
-M1 Low current, -A winding

Tabletop (Optional)

Option Description
-TT1 Metric graduated tabletop
-TT2 English graduated tabletop
  1. -TT2 option not available with APR100DR models

Travel (Required)

Option Description
Continuous travel
-TR010 Limited travel, +/- 5 degrees
-TR020 Limited travel, +/- 10 degrees
-TR040 Limited travel, +/- 20 degrees
-TR060 Limited travel, +/- 30 degrees
-TR080 Limited travel, +/- 40 degrees
-TR100 Limited travel, +/- 50 degrees
-TR120 Limited travel, +/- 60 degrees
-TR140 Limited travel, +/- 70 degrees
-TR160 Limited travel, +/- 80 degrees
-TR200 Limited travel, +/- 100 degrees
-TR240 Limited travel, +/- 120 degrees
-TR270 Limited travel, +/- 135 degrees
  1. -TRxxx options contain an extra 1.5 degrees between the nominal travel and the electrical limit on each side. (Ex: -TR270 contains +/- 135 degrees of nominal travel, with +/-136.5 degrees of travel between electrical limits.)
  2. -TR010 option is not available with APR100DR.

Hardstops (Optional)

Option Description
-HS Mechanical hard stops
  1. -HS option requires the selection of a Tabletop option (-TTx) and a Limited Travel option (-TRxxx).

Brake (Optional)

Option Description
-BK Holding brake
  1. -BK option not available with APR260DR models.

Metrology (Required)

Option Description
-PL3 Metrology, uncalibrated with performance plots
-PL4 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.

Option Description
-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.

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