The SR50 and PR50 compact rotation stages are designed to rotate optical components up to 1 inch in diameter such as polarizers, wave plates, or wedges. The small size allows use in confined spaces such as laser cavities, disk texturing machines, or manufacturing areas for fiber optical components. Utilizing a motor-mounted encoder, these closed-loop DC motor systems may provide more precision than open-loop stepper motors without an encoder.
| Models |
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|---|---|---|---|
| Optic Diameter | 25.4 mm | 25.4 mm | |
| Aperture Diameter | 25.7 mm | 25.7 mm | |
| Angular Range | 360° | 360° | |
| Maximum Speed | 20°/s | 4°/s | |
| Maximum Torque | 0.1 Nm | 0.4 Nm | |
| Centered Load Capacity | 10 N | 30 N | |
| Minimum Incremental Motion | 20 mdeg | 4.0 mdeg | |
| Accuracy, Typical | ±25 mdeg | ±15 mdeg | |
| Bi-directional Repeatability, Typical | ±30 mdeg | ±15 mdeg | |
| Uni-directional Repeatability, Typical | ±5.0 mdeg | ±2.5 mdeg | |
| Wobble, Typical | ±20 µrad | ±20 µrad | |
| Inertia | 0.015 kg.m2 | 0.015 kg.m2 | |
| Origin Repeatability | ±25 mdeg | ±25 mdeg | |
| Cable Length | 3 m | 3 m | |
| MTBF | 10,000 h (25% load, 30% Duty cycle) | 10,000 h (25% load, 30% Duty cycle) | |
| Weight | 0.4 kg | 0.3 kg | |
| RoHS | |||
| Retaining Ring Thread | 1.063-20 | 1.063-20 |
The SR50CC stage features minimum incremental motion of 0.004°. The DC motor is folded inside the stage body to give an extremely small footprint for a stage at this level of precision. The stage is equipped with a hardware origin, allowing the stage to return to a reference home position to within 0.01°. It can run in continuous rotation mode. Stepper motor version
The PR50CC stage is a cost-efficient alternative to the SR50CC for applications that do not require the high-resolution and precision of the SR50, or for applications that could benefit from higher speeds up to 20°/s. This DC Servo stage features angular resolution of 0.02° and is equipped with a hardware origin, allowing for continuous rotation of 360°. Stepper motor version
The optional
Newport also offers versions of the DC servo motor rotation stages with integrated CONEX motion controller. For out-of-the box control, the CONEX controller is preconfigured and delivered with the rotation stage.
The central aperture of SR50 and PR50 stages is 1.063-20 threaded. Each stage is shipped with two retaining rings to allow mounting of any Ø25.4 mm diameter optics within the aperture. Four M3 holes allow for attachment of custom top plates.
The lightweight, low profile design incorporates an aluminum body with pre-loaded ball bearings. This proprietary ball bearing design provides smooth rotation with minimal wobble. A precision ground worm gear produces consistent driving torque to the rotating carriage and eliminates variations in motor current.
Newport guarantees specification values which are measured and recorded following ASME B5.57 and ISO 230-2 standards. The typical performance values are two times better than the guaranteed specifications.
Compatible motion controllers for these DC servo stages are:
Ultra-High Velocity