ASRT Mechanical-Bearing Direct-Drive Rotary Stage
Description
Design Features
- IP66: Totally protected against dust and water jets from any direction
- Direct-drive motor provides rapid precision motion with no gear backlash
- Axial load capacity up to 175 kg
- Three different aperture sizes: 30 mm, 80 mm, 130 mm
- 100-200 rpm continuous rotation speed
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 has either high accuracy encoder or magnetic encoder feedback. Unlimited travel is standard and optional limited travel is available. The ASRT comes in three different sizes for different load and torque ratings.
A polymer-based paint on the housing and hard-coated tabletop is standard for corrosion protection. The stage has optional brown, green, grey, black and white paint colors.
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.
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.
Brushless Direct-Drive
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.
Specifications
ASRT Series Specifications
| Model | ASRT-185 | ASRT-245 | ASRT-300 | |
|---|---|---|---|---|
| Travel | 360° Continuous | |||
| Accuracy(1) (-O) | Standard | 20 arc sec | ||
| HALAR | 2 arc sec | |||
| Resolution (-O) | 0.036 arc sec | 0.027 arc sec | 0.018 arc sec | |
| Bidirectional Repeatability(1) (-O) | 1 arc sec | |||
| Accuracy(1) (-M) | Standard | 50 arc sec | 45 arc sec | N/A |
| HALAR | 15 arc sec | 15 arc sec | N/A | |
| Resolution (-M) | 0.63 arc sec | 0.54 arc sec | N/A | |
| Bidirectional Repeatability(1) (-M) | 10 arc sec | |||
| Tilt Error Motion | 3 arc sec | |||
| Maximum Speed | 200 rpm | 150 rpm | 100 rpm | |
| Maximum Acceleration | 950 rad/s2 | 900 rad/s2 | 650 rad/s2 | |
| Aperture | 30 mm | 80 mm | 130 mm | |
| Maximum Torque (Peak) | 9.6 N-m | 35.5 N-m | 46.7 N-m | |
| Maximum Torque (Continuous) | 2.1 N-m | 6.6 N-m | 9.7 N-m | |
| Load Capacity | Axial | 30 kg | 140 kg | 175 kg |
| Radial | 25 kg | 125 kg | 150 kg | |
| Moment | 175 N-m | 425 N-m | 500 N-m | |
| Rotor Inertia (Unloaded) | Base Model | 0.0096 kg-m2 | 0.026 kg-m2 | 0.066 kg-m2 |
| Aperture Opt. | 0.013 kg-m2 | 0.039 kg-m2 | 0.079 kg-m2 | |
| Stage Mass | Base Model | 10.3 kg | 18.8 kg | 25.0 kg |
| Aperture Opt. | 12.6 kg | 21.9 kg | 29.0 kg | |
| Material | Polymer-Painted Aluminum/Aluminum Hardcoat | |||
| MTBF (Mean Time Between Failure)(2) | 10,000 Hours | |||
- Certified with each stage.
- 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.
Electrical Specifications
| Drive System | Slotless, Brushless, Direct-Drive Rotary Motor | ||
| Feedback | Noncontact Rotary Encoder | ||
| Maximum Bus Voltage | 320 VDC | ||
| Home Switch | Near Center | ||
Recommended Controller
| Multi-Axis | A3200 | HLe MXH/HPe MXH/CP MXU/MP MXU/CL MXU/Npaq | ||
| Ensemble | HLe MXH/HPe MXH/CP MXU/MP MXU/CL MXU | |||
| Single Axis | Soloist | HLe MXH/HPe MXH/CP MXU/MP MXU/CL MXU | ||
-
ASRT Motor Torque vs Temp 
Dimensions
-
ASRT-185 
-
ASRT-245 
-
ASRT-300 
Ordering Information
Ordering Example
| ASRT | -245 | -DR | -O | -D | -GREEN |
Ordering Options
| Series | Width (mm) | Model Options | Encoder Option | Accessories | Color Scheme |
|---|---|---|---|---|---|
| ASRT | -185 -245 -300 |
-DR -DR-A |
-O -M |
-D -P -F -C -CA |
-BLACK -WHITE -GREEN -GRAY -TAN |
ASRT Series Rotary Stage
| Option | Description |
|---|---|
| ASRT-185 | Direct-drive sealed rotary table; 185 mm wide; unlimited travel |
| ASRT-245 | Direct-drive sealed rotary table; 245 mm wide; unlimited travel |
| ASRT-300 | Direct-drive sealed rotary table; 300 mm wide; unlimited travel |
Model Option
| Option | Description |
|---|---|
| -DR | Direct drive |
| -DR-A | Direct drive, optional aperture |
Encoder Option
| Option | Description |
|---|---|
| -O | High accuracy encoder option (1 Vpp output) |
| -M | Magnetic encoder option (1 Vpp output); available with -185 and -245 models only |
Accessories
| Option | Description |
|---|---|
| -D | Desiccant cartridge |
| -P | Air-purge fitting |
| -F | Mounting flange |
| -C | Cover, horizontal axis, no shaft aperture |
| -CA | Cover, horizontal axis, shaft aperture |
Color Scheme
| Option | Description |
|---|---|
| -BLACK | Black polymer-based exterior paint |
| -WHITE | White polymer-based exterior paint |
| -GREEN | Green polymer-based exterior paint |
| -GRAY | Gray polymer-based exterior paint |
| -TAN | Desert tan polymer-based exterior paint |