- IP66: Totally protected against dust and water jets from any direction
- Operation over large temperature range: -20 to +70° C
- Low-friction seal minimizes direction reversal hysteresis to allow small, precise positioning
- Shaft aperture option with three available sizes: 30 mm, 80 mm, and 130 mm
- Excellent accuracy (to 2 arc sec) and repeatability (to 1.5 arc sec)
- Axial load capacity to 130 kg
- 100-200 rpm continuous rotation speed
- Direct-drive motor provides rapid precision motion with no gear backlash
ASRT sealed rotary stages provide precise angular positioning in hostile environments where dirt or liquids are present. The stage can operate in environments with dust or fluid jets. The ASRT also can be used where cutting fluids are present. Applications range from industrial machining automation to precision sensor positioning in hostile environments. The ASRT is effective for precise rotary motion in product environmental test and range tracking applications.
The ASRT series is available in three different sizes for a variety of load and motor torque ratings. A shaft aperture option on all sizes allows for electrical, pneumatic, or fluid feedthrough. Offered with a high-accuracy optical (incremental or absolute) non-contact encoder or with a robust magnetic non-contact encoder, the ASRT has many feedback options to meet the specific requirements for many tough applications.
Standard operating temperature for the ASRT is 0 to 70°C. Operation below freezing requires the optional air-purge and dessicant. Air-purged stages can operate from -20 to 70°C.
A polymer-based paint on the housing and hard-coated tabletop is standard for corrosion protection. The stage has optional tan, black, and white paint colors.
Rotary speeds of 100 to 200 rpm are available. The ASRT includes an electrically grounded shaft and housing to protect against electrical shock and eliminate RF re-radiation, and housing grounding points are included. Circular sealed connectors are standard, while options include desiccant cartridge, air purge option, and mounting flange accessory.
Superior Mechanical Design
Dual large-diameter bearings are used to maximize performance with respect to tilt error motion, moment stiffness, and repeatability. The large diameter bearings permit large payloads without compromising performance.
To maximize positioning performance, the ASRT series utilizes Aerotech’s 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. The low inertia and zero backlash make the ASRT the ideal solution for applications requiring frequent directional changes.
Aerotech manufactures a wide range of servo amplifiers and advanced controllers to provide a complete integrated package.
ASRT Series Specifications
|Accuracy(1) (-O)||Optical Encoder (-O/-O-ABS)||Standard||194 µrad (40 arc sec)||145 µrad (30 arc sec)||97 µrad (20 arc sec)|
|HALAR||10 µrad (2 arc sec)|
|Magnetic Encoder (-M)||Standard||243 µrad (50 arc sec)||218 µrad (45 arc sec)||N/A|
|HALAR||97 µrad (20 arc sec)||97 µrad (20 arc sec)||N/A|
|Optical Encoder (-O)||0.5 µrad (0.1 arc sec)||0.4 µrad (0.08 arc sec)||0.03 µrad (0.06 arc sec)|
|Optical Encoder (-O-ABS)||0.8 µrad (0.16 arc sec)||0.8 µrad (0.16 arc sec)||0.8 µrad (0.16 arc sec)|
|Magnetic Encoder (-M)||12.1 µrad (4 arc sec)||11.2 µrad (3 arc sec)||N/A|
|Bidirectional Repeatability(1)||Optical Encoder (-O)||7.3 µrad (1.5 arc sec)|
|Optical Encoder (-O-ABS)||7.3 µrad (1.5 arc sec)|
|Magnetic Encoder (-M)||73 µrad (15 arc sec)||N/A|
|Total Tilt Error Motion(1)||24 µrad (5 arc sec)|
|Maximum Speed(2)||200 rpm||150 rpm||100 rpm|
|Maximum Acceleration(2)||930 rad/s2||635 rad/s2||425 rad/s2|
|Aperture||30 mm||80 mm||130 mm|
|Maximum Torque (Continuous)||2.85 N·m||5.99 N·m||10.73 N·m|
|Load Capacity||Axial||30 kg||105 kg||130 kg|
|Radial||25 kg||90 kg||110 kg|
|Inertia (Unloaded)||No Aperture||0.009 kg·m2||0.034 kg·m2||0.091 kg·m2|
|Aperture||0.011 kg·m2||0.036 kg·m2||0.100 kg·m2|
|Stage Mass||No Aperture||9.5 kg||17 kg||22.5 kg|
|Aperture||12.0 kg||20.5 kg||27.0 kg|
|Material||Polymer-Painted Aluminum / Aluminum Hardcoat|
|MTBF (Mean Time Between Failure)(3,4)||10,000 Hours|
- Certified with each stage.
- Application dependent. Requires the selection of an appropriate amplifier with sufficient voltage and current.
- Application dependent. Dry environments between 0° and 70° C up to 10,000 hours.
- Long-term exposure to temperature cycles and wet environments will require periodic maintenance.
|Drive System||Slotless, Brushless, Direct-Drive Rotary Motor|
|Feedback System||Incremental Optical (-O)||1 Vpp, Incremental Non-Contact Optical Encoder|
|16384 lines/rev||23600 lines/rev||32768 lines/rev|
|Absolute Optical (-O-ABS)||Absolute, BiSS Interface, Non-Contact Optical Encoder|
|Magnetic (-M)||1 Vpp, Incremental Non-Contact Magnetic Encoder||N/A|
|900 lines/rev||1200 lines/rev|
|Maximum Bus Voltage||320 VDC|
|Model/Options||Encoder||Accessories||Exterior Color/Mounting Orientation||Flange Mounting Kit||Cover Shroud Kit|
ASRT Series Rotary Stage
|ASRT185DR||Direct-drive sealed rotary table; 185 mm wide|
|ASRT185DR-A||Direct-drive sealed rotary table with 30 mm aperture; 185 mm wide|
|ASRT245DR||Direct-drive sealed rotary table; 245 mm wide|
|ASRT245DR-A||Direct-drive sealed rotary table with 80 mm aperture; 245 mm wide|
|ASRT300DR||Direct-drive sealed rotary table; 300 mm wide|
|ASRT300DR-A||Direct-drive sealed rotary table with 130 mm aperture; 300 mm wide|
|-O||Optical incremental encoder option (1 Vpp output)|
|-O-ABS||Optical absolute encoder option|
|-M||Magnetic encoder option (1 Vpp output); Not available on the ASRT300DR|
|-AP||Air purge kit|
|-D||Desiccant cartridge kit|
Exterior Color / Mounting Orientation (Required)
|-PV1||Desert tan; vertical axis of rotation|
|-PV2||Black; vertical axis of rotation|
|-PV3||White; vertical axis of rotation|
|-PH1||Desert tan; horizontal axis of rotation|
|-PH2||Black;horizontal axis of rotation|
|-PH3||White; horizontal axis of rotation|
Flange Mounting Kit (Optional)
|-F1||Desert tan; flange kit|
|-F2||Black; flange kit|
|-F3||White; flange kit|
Note: Vertical mounting orientation only
Cover Shroud Kit (Optional)
|-C1||Desert tan; cover shroud kit|
|-C2||Black; cover shroud kit|
|-C3||White; cover shroud kit|
Note: Horizontal mounting orientation only