ALAR-SP Large Aperture Rotary Stages
The ALAR family of direct-drive, large-aperture rotary stages provides superior angular positioning and velocity control. ALAR-SP (standard profile) is the flagship of the ALAR product line. It offers a balance of high load capability, torque and profile height and is suitable for use in both vertical and horizontal applications. Featuring a large-diameter clear aperture and a non-cogging direct-drive motor, ALAR-SP stages offer a better-performing alternative to worm-gear stages.
- Description
- Specifications
- Dimensions
- Ordering Info
- Downloads
Design Features
- Offers an ideal balance of load capability, torque output & profile height, with large-diameter clear aperture up to 325 mm
- Supports large payloads & gimbal configurations thanks to high axial-, radial- & moment-load capacities
- Delivers extremely precise, high-torque, cog-free rotation with direct-drive motor
- Integrates easily into multi-axis systems & machines
- Provides long service life & consistent performance over time
- Available with absolute encoder option & limited travel for maximum payload security
Key Applications
ALAR-SP stages are best suited for applications including:
- Single- and multi-axis sensor testing
- Inertial navigation device qualification
- Missile seeker testing
- Antenna testing
- Photonic component alignment
- High-accuracy laser processing
- Precision wafer inspection
- Custom gimbal assemblies
Advantage: ALAR
ALAR-SP offers numerous advantages over worm-drive stages. Because ALAR stages use direct-drive torque motors, they are free from backlash, vibration, and excessive wear commonly associated with gear-driven stages, and they are also capable of much higher speeds and accelerations. These advantages translate to higher system accuracy, repeatability, and longevity, as well as greater throughput. Users can more precisely manufacture, inspect, or process more parts in less time, leading to lower operating costs and higher profits.
Brushless, Slotless Direct-Drive Motors
Aerotech’s brushless, direct-drive motors are featured in all ALAR stages. Because there are neither brushes to wear, nor gear trains or couplings to maintain, ALAR stages are capable of high speeds and accelerations, plus consistent, stable performance over time with zero backlash, windup, or hysteresis. Further, ALAR motors are both slotless and ironless, thereby eliminating cogging and torque ripple to deliver exceptionally smooth motion. ALAR stages are ideal for applications requiring outstanding contoured motion, smooth scan velocities, and precise, incremental steps.
High Payload Capacity and Moment-Load Stiffness
Large-diameter angular contact bearings provide high axial-, radial-, and moment-load capacities, maximizing positioning performance with respect to tilt error, stiffness, and rotating friction. ALAR-SP is capable of achieving the highest performance standards regardless of whether the axis of rotation is vertical or horizontal. Due to its ample moment-load capability, ALAR-SP is especially well-suited to carry cantilevered or offset payloads, when the center of gravity is shifted away from the axis of rotation.
Flexible Configurations for Simplified Integration
ALAR-SP is offered with features and options that facilitate easy integration into multi-axis motion systems and subsystems. It is available with a range of clear-aperture diameters from 100 mm to 325 mm, and also a variety of feedback options including analog 1 Vpp, digital RS422, and absolute encoders. Continuous 360-degree travel is standard, with available limited-travel options ranging from 10 degrees to 340 degrees. ALAR250SP and ALAR325SP can be configured with an even more powerful motor option for increased torque to more effectively rotate high-inertia payloads. ALAR-SP stages can even be adapted for use in vacuum environments.
Applications
Common applications for ALAR-SP stages include single- and multi-axis sensor testing, missile seeker testing, antenna testing, inertial navigation device testing, photonic component alignment, high-accuracy laser machining, and precision wafer inspection. ALAR-SP stages can also be configured as multi-axis gimbals. The large-diameter clear aperture and direct-drive motor make ALAR a better-performing alternative to more traditional worm-gear stages, especially in dynamic applications with high payloads.
ALAR-SP Specifications
| ALAR100SP | ALAR150SP | ALAR200SP | ALAR250SP-M1 | ALAR250SP-M2 | ALAR325SP-M1 | ALAR325SP-M2 | |
|---|---|---|---|---|---|---|---|
| Travel | Continuous (optional 340° max. limited travel) | ||||||
| Aperture | 100 mm | 150 mm | 200 mm | 250 mm | 325 mm | ||
| Resolution (Min. Incremental Motion)(1) | 0.1 µrad (0.02 arc sec) | 0.08 µrad (0.016 arc sec) | 0.06 µrad (0.012 arc sec) | 0.05 µrad (0.01 arc sec) | 0.04 µrad (0.009 arc sec) | ||
| Accuracy(2)(3) | ± 9.7 µrad (± 2 arcsec) | ||||||
| Bidirectional Repeatability(3) | ± 2.4 µrad (± 0.5 arc sec) | ||||||
| Tilt-Error Motion | 9.7 µrad (2.0 arc sec) | ||||||
| Maximum Speed(4) | 300 rpm | 250 rpm | 90 rpm | 140 rpm | 150 rpm | ||
| Maximum Torque | 23.9 N•m | 42.9 N•m | 126.8 N•m | 137.8 N•m | 206.7 N•m | 213.8 N•m | 320.8 N•m |
| Continuous Torque | 6.0 N•m | 10.7 N•m | 19.3 N•m | 21.0 N•m | 31.5 N•m | 35.0 N•m | 52.4 N•m |
| Axial Load | 1550 N | 1950 N | 4675 N | 4950 N | 5825 N | ||
| Radial Load | 1350 N | 1925 N | 4775 N | 5200 N | 6650 N | ||
| Moment Load | 250 N•m | 450 N•m | 1600 N•m | 1825 N•m | 2650 N•m | ||
| Shaft Inertia | 0.022 kg•m2 | 0.040 kg•m2 | 0.320 kg•m2 | 0.500 kg•m2 | 1.010 kg•m2 | ||
| Shaft Inertia with Limits | 0.026 kg•m2 | 0.051 kg•m2 | 0.359 kg•m2 | 0.573 kg•m2 | 1.2 kg•m2 | ||
| Stage Mass | 16.3 kg | 18.6 kg | 40.4 kg | 51.3 kg | 61.2 kg | ||
| Stage Mass with Limits | 17 kg | 19.6 kg | 43.1 kg | 54.5kg | 64.9 kg | ||
- Resolution assumes -AS encoder with 2000x controller multiplication.
- Certified with each stage. Requires the use of an Aerotech controller.
- Repeatability and accuracy are dependent on encoder selection. To achieve the listed specifications, the electrical resolution should be 0.2 arc sec or smaller.
- Square-wave digital encoder options will limit maximum speed below the listed value. Contact factory for specific stage and encoder speed combination.
ALAR-SP Electrical Specifications
| ALAR100SP | ALAR150SP | ALAR200SP | ALAR250SP-M1 | ALAR250SP-M2 | ALAR325SP-M1 | ALAR325SP-M2 | |
|---|---|---|---|---|---|---|---|
| Motor | Brushless Slotless | ||||||
| Continuous Current-Apk | 2.7 | 6.2 | 5.3 | 8.0 | 5.1 | 7.7 | |
| Continuous Current-Arms | 1.9 | 4.4 | 3.8 | 5.6 | 3.6 | 5.4 | |
| Peak Current, Stall-Apk | 10.8 | 24.8 | 34.8 | 52.2 | 31.2 | 46.8 | |
| Peak Current, Stall-Arms | 7.6 | 17.5 | 24.6 | 36.9 | 22.1 | 33.1 | |
| Bus Voltage | Up to 340 VDC | ||||||
| Incremental Encoder Line Count | 31,488 lines/rev | 40,000 lines/rev | 55,040 lines/rev | 64,800 lines/rev | 76,800 lines/rev | ||
| Limit Switches(1) | 5 V, normally closed | ||||||
- Limited travel options only.
ALAR-SP Large-Aperture Rotary Stage
| Option | Description |
|---|---|
| ALAR100SP | Mechanical-bearing, direct-drive rotary stage, 100 mm aperture |
| ALAR150SP | Mechanical-bearing, direct-drive rotary stage, 150 mm aperture |
| ALAR200SP | Mechanical-bearing, direct-drive rotary stage, 200 mm aperture |
| ALAR250SP | Mechanical-bearing, direct-drive rotary stage, 250 mm aperture |
| ALAR325SP | Mechanical-bearing, direct-drive rotary stage, 325 mm aperture |
Motor (Required)
| Option | Description |
|---|---|
| -M1 | Standard motor |
| -M2 | High-power motor |
- Motor options (-M1 and -M2) only apply to the ALAR250SP and ALAR325SP stages.
Travel (Required)
| Option | Description |
|---|---|
| Continuous travel (standard) | |
| -TR010 | Limited travel, ±5 degrees |
| -TR020 | Limited travel, ±10 degrees |
| -TR030 | Limited travel, ±15 degrees |
| -TR060 | Limited travel, ±30 degrees |
| -TR090 | Limited travel, ±45 degrees |
| -TR120 | Limited travel, ±60 degrees |
| -TR180 | Limited travel, ±90 degrees |
| -TR240 | Limited travel, ±120 degrees |
| -TR300 | Limited travel, ±150 degrees |
| -TR340 | Limited travel, ±170 degrees |
Feedback (Required)
| Option | Description |
|---|---|
| -E1 | Incremental encoder, 1 Vpp |
| -E2 | Incremental encoder, digital RS422, x4 interpolation |
| -E3 | Incremental encoder, digital RS422, x20 interpolation |
| -E4 | Incremental encoder, digital RS422, x40 interpolation |
| -E5 | Incremental encoder, digital RS422, x100 interpolation |
| -E6 | Incremental encoder, digital RS422, x200 interpolation |
| -E7 | Absolute encoder |
Integration (Required)
| 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. |
Related Products
Automation1 MDK Motion Development Kit
Automation1 iSMC Intelligent, Software-Based Motion Controller
Automation1 XR3 Multi-Axis Servo Drive Rack
Automation1 XC4e Enhanced, PWM Servo Drive
ALAR-LP Large Aperture Rotary Stages
ALAR-XP Large Aperture Rotary Stages
AGR Gear-Driven Rotary Stages
