ASR1000 Mechanical-Bearing Direct-Drive Rotary Stage


Design Features

  • High dynamic, precision performance
  • Large aperture for product feed-through
  • Low inertia shaft for maximum acceleration
  • Package design optimized to minimize stage weight
  • Direct-drive brushless servomotor; direct-coupled rotary encoder
  • Precision angular contact bearings

Aerotech's ASR1000 series direct-drive rotary stage was designed to meet the demanding needs of high-performance precision machining. The low-inertia motor and high-accuracy encoder make it the ideal combination of speed and accuracy.

Brushless Direct-Drive

To maximize positioning performance, the ASR1000 series utilizes Aerotech's brushless series of motors. Optimized for production applications, the brushless direct-drive motor of the ASR1000 has the advantage of no brushes to wear and no gear trains to maintain. The low-inertia motor enables the ASR1000 to reach speeds and accelerations that were previously unachievable with earlier generation direct-drive devices or worm-driven stages. Designed for applications requiring frequent direction changes, the ASR1000 offers low inertia and zero backlash in a compact package.

Compact Packaging

The design of the ASR1000 series direct-drive rotary stage was optimized to minimize stage weight. The resulting product – with a net overall weight under 5 kg – is significantly lighter than previous offerings. When used to replace an existing rotary stage in a multiple-axis system, an increase in performance can be expected for all positioning stages carrying the rotary stage.

Accurate Positioning

To maximize position and contour accuracy, the ASR1000 utilizes a high resolution shaft-mounted rotary encoder. When coupled with Aerotech's MXH series multipliers, final resolutions can be as fine as 0.63 arc sec. The absence of gear trains and mechanical couplings means no position errors caused by hysteresis, windup or backlash. Absolute repeatabilities of ±3 arc seconds are attainable.

The result is a production-worthy tool that offers higher throughput, lower maintenance, superior final parts and an outstanding return on investment.

Flexible Options

A large aperture aids high-volume production by providing the means for continuous product feedthrough. For applications requiring a collet, several shaft options are available to easily interface to existing machine designs.

Aerotech manufactures a wide range of matching drives and controls to provide a fully integrated and optimized solution. Aerotech's high-power brushless amplifiers are available in several convenient packages and the controller options range from stand-alone indexers to sophisticated PC-bus-based controllers with unmatched contouring routines and system tools.


ASR1000 Series Specifications

Travel ±360° Continuous
Shaft Diameter 19 mm
Shaft Thread 0.7500-32NS-3
Maximum Aperture Diameter 14 mm ±0.5 mm
Drive System Direct-Drive Brushless Servomotor
Feedback 8192 cycles/rev; analog output encoder (standard)
Maximum Rotary Speed(1) 2000 rpm
Accuracy(1) ±72.8 µrad (±15 arc sec)
Repeatability(1) ±14.6 µrad (±3 arc sec)
Inertia 9.0 x 10-5 kg·m2
Nominal Stage Weight 4.4 kg
Maximum Load Axial 3.0 kg
Moment 5 N·m
Motor Type BM250
Continuous Current, Stall Apk 10
Arms 7.1
Bus Voltage Up to 320 VDC
Axis Error Motion Axial 2.5 µm
Radial 5.0 µm
Material Stage Shaft Stainless Steel
Stage Body Aluminum
Finish Stage Shaft Stainless Steel
Stage Body Black Anodize
  1. Maximum speed based on stage capability; maximum application velocity may be limited by system data rate and system resolution.
  • Axial and Radial Cantilevered Load Capability (ASR1000)


  • ASR1000

Ordering Information

Ordering Example

ASR1000 -10 -MS -RE8192AS

Ordering Options

Series Drive MotorConnectorPosition Transducer
ASR1000 -10 -HPD

ASR Series Direct-Drive Rotary Stage

Option Description
ASR1000 Direct-drive rotary stage

Drive Motor

Option Description
-10 Direct-drive brushless motor

Connector Option

Option Description
-HPD One high-power D and one 25-pin D-style connector option
-25D Two 25-pin D-style connector option

Note: -25D option required for direct connection to CMS on some Aerotech stages. Consult Aerotech for applicability.

Position Transducer

Option Description
-RE8192AS Incremental encoder, 8192 ppr


Option Description
-MP Mounting plate with 75 mm square hole pattern