MPS-GR Miniature Gear-Driven Rotary Stages
The MPS50GR and MPS75GR rotary stages provide accurate positioning performance in a low profile and compact footprint. They are perfect for the confines and requirements of the laboratory and are also applicable for use in manufacturing environments. MPS-GR stages are ideal for optics, measurement, alignment and other demanding applications.
- Description
- Specifications
- Dimensions
- Ordering Info
- Downloads
Design Features
- Low profile and compact with aperture
- Precision worm-gear drive
- DC servo or stepper motor
- Continuous 360 degree rotary positioning
- Graduated tabletop
- High vacuum capable
- Optional lens mount adapter
- Compact multi-axis configurations with linear and other MPS series stages
Construction Features
The MPS-GR stages incorporate a precision worm-gear drive mechanism and bearing components for highly accurate positioning performance over the lifetime of the product. They are available with DC servo or stepper motors. The DC servomotors for both stages are equipped with a square-wave rotary encoder. The MPS50GR has a 20 mm aperture and the MPS75GR has a 30 mm aperture. The MPS75GR includes a manual adjustment knob.
Vacuum and Mounting Options
Both stages are available with optional vacuum preparation to 10-6 torr including a vacuum-rated connector. An optional breadboard mounting plate provides direct mounting to both English and metric breadboards. Also available is an aperture Lens Mount Option (LMO) for easy mounting of standard lenses over the stage aperture.
The MPS50GR and MPS75GR are members of the MPS (Miniature Positioning Stage) family of linear, rotary, goniometer and vertical lift stages. Two or more stages can easily be mounted together in numerous combinations using standardized mounting patterns with adapter plates and brackets.
MPS-GR Specifications
| MPS50GR | MPS75GR | |
|---|---|---|
| Travel | 360° Continuous | |
| Accuracy-Calibrated(1) | 80 arc sec | |
| Resolution (Minimum Incremental Motion) -DC Servomotor (-M1) | 2 arc sec | 1 arc sec |
| Resolution (Minimum Incremental Motion) -Stepper Motor (-M2) | 2 arc sec | 1 arc sec |
| Repeatability (Unidirectional) -DC Servomotor (-M1) | 8 arc sec | 6 arc sec |
| Repeatability (Unidirectional) -Stepper Motor (-M2) | 20 arc sec | 10 arc sec |
| Tilt Error Motion | 40 arc sec | |
| Worm Gear Ratio | 80:1 | 100:1 |
| Maximum Speed-DC Servomotor (-M1) | 23 deg/s | 180 deg/s |
| Maximum Speed-Stepper Motor (-M2) | 4.5 deg/s | 100 deg/s |
| Aperture | 20 mm | 30 mm |
| Maximum Torque (Continuous) | 0.4 N·m | 0.6 N·m |
| Load Capacity-Axial(2) | 4 kg | 12 kg |
| Load Capacity-Radial(2) | 1 kg | 5 kg |
| Load Capacity-Moment(2) | 0.25 N·m | 1.5 N·m |
| Rotor Inertia (Unloaded) | 0.000031 kg·m2 | 0.000141 kg·m2 |
| Stage Mass | 0.8 kg | 1.7 kg |
| Material | Anodized Aluminum Body | |
- Requires -PL2 metrology option.
- Payload specifications are single-axis system.
- Excessive duty cycle may impact stage accuracy.
- Specifications are for single-axis systems measured 25 mm above the tabletop. Performance of multi-axis systems is payload and workpoint dependent. Consult factory for multi-axis or non-standard applications.
MPS-GR Electrical Specifications
| MPS50GR | MPS75GR | |
|---|---|---|
| Drive System | DC Servomotor (-M1): DC Brush Servomotor with 14:1 Gearbox Stepper Motor (-M2): 24 VDC Bipolar Stepper Motor with 43:1 Gearbox | DC Servomotor (-M1): DC Brush Servomotor Stepper Motor (-M2): 24 VDC Bipolar Stepper Motor |
| Feedback | DC Servomotor (-M1): 512 lines/rev Rotary Encoder Stepper Motor (-M2): N/A | DC Servomotor (M1): 10,000 lines/rev Rotary Encoder Stepper Motor (-M2): N/A |
| Electronic Resolution | DC Servomotor (-M1): 0.565 arc sec (0.000157°) Stepper Motor (-M2): 0.785 arc sec (0.000218°) @ 480 steps/rev motor resolution | DC Servomotor (-M1): 0.324 arc sec (0.00009°) Stepper Motor (-M2): 0.324 arc sec (0.00009°) @ 40000 steps/rev motor resolution |
| Maximum Bus Voltage | DC Servomotor (-M1) 48 VDC Stepper Motor (-M2): 48 VDC* | |
| Home Marker | Optical Switch | |
- *With Aerotech control system.










MPS-GR Series Miniature Gear-Driven Rotary Stage
| Option | Description |
|---|---|
| MPS50GR | MPS50GR miniature gear-driven rotary stage with 20 mm aperture |
| MPS75GR | MPS75GR miniature gear-driven rotary stage with 30 mm aperture |
Vacuum Preparation (Optional)
| Option | Description |
|---|---|
| -HV | High vacuum preparation to 10-6 torr |
Motor (Required)
| Option | Description |
|---|---|
| -M1 | DC servomotor |
| -M2 | Stepper motor |
Mounting Plate (Optional)
| Option | Description |
|---|---|
| -MP | Optical table mounting plate |
Lens Mount (Optional)
| Option | Description |
|---|---|
| -LMO | Aperture lens mount |
Metrology (Required)
| Option | Description |
|---|---|
| -PL0 | No metrology performance plots |
| -PL1 | Metrology, uncalibrated with performance plots |
| -PL2 | Metrology, calibrated (HALAR) with performance plots |
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. |










