The SR50 and PR50 Series compact rotation stages are designed to rotate optical components up to 1 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.
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. The motor is folded inside the stage body to give an extremely small footprint for a stage at this level of precision.
All SR50 stages feature minimum incremental motion of 0.004°, which may be achieved with either DC Servo or open-loop stepper motors (half-step mode). The stages are equipped with a hardware origin allowing the stage to return to a reference home position to within 0.01°. SR50 stages can run in continuous rotation mode.
The PR50 stages are a cost-efficient alternative to the SR50 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. The PR50 stages feature angular resolution of 0.01°, which may be achieved with either DC Servo or open-loop stepper motors in half-step mode. The stages are equipped with a hardware origin and allow for continuous rotation of 360°.
Interface
The central aperture is threaded 1.063-20 in. SR50 and PR50 stages are shipped with two, same diameter 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.
Note: Due to its very low profile, the PR50 and SR50 stages contain pressure sensitive components. For use at a pressure level below 0.25 bar, please contact our sales department.
The EQ45 bracket can be used for vertical mounting of a PR50 or SR50 stage.
Design Details
|
SR50 Series
|
PR50 Series
|
| Base Material |
Aluminum |
Aluminum |
| Bearings |
Ball bearings |
Ball bearings |
| Drive Mechanism |
Ground worm gear |
Ground worm gear, 1:63 |
| Worm Gear Ratio |
1:70 |
1:63 |
| Reduction Gear |
107.143:1 |
11.8642:1 |
| Feedback |
SR50CC
: Motor mounted rotary encoder, 48 pts/rev
SR50PP
: Open-loop, no encoder |
PR50CC
: Motor mounted rotary encoder, 48 pts/rev
PR50PP
: Open-loop, no encoder |
| Origin |
Optical |
Optical |
| Cable (m) |
3 |
Specifications
|
SR50 Series
|
PR50 Series
|
| Travel Range (°) |
360 continuous |
360 continuous |
| Resolution (°) |
0.001(1) |
0.01(1) |
| Minimum Incremental Motion (°) |
0.004 |
0.02 |
| Uni-directional Repeatability, Guaranteed (°) |
0.01 |
0.05 |
| Reversal Value (Hysteresis), Guaranteed (°) |
0.04 |
0.1 |
| Bi-directional Repeatability, Guaranteed1 (°) |
0.05 or ± 0.025 |
0.08 or ± 0.04 |
| Absolute Accuracy, Guaranteed (°) |
0.06 ° or ± 0.03 |
0.1 ° or ± 0.05 |
| Maximum Speed (°/s) |
4(2) |
20(2) |
| Wobble, Guaranteed (µrad) |
100 or ± 50 |
100 or ± 50 |
| MTBF (h) |
10,000 |
| Weight [lb (kg)] |
0.7 (0.3) |
0.8 (0.4) |
1) Shown are peak to peak, guaranteed specifications or ± half the value as sometimes shown. For the definition of typical specifications which are about 2X better than the guaranteed values, see
Motion Control Metrology Primer2) Max. speed with SMC100PP: 8°/s for PR50PP and 1.6°/s for SR50PP
Hysterisis plot for SR50 Series stages. The typical (mean) hysterisis is 0.02 °. The guaranteed value is 0.04 °.
Absolute accuracy plot for SR50 Series stages. The typical (mean) absolute accuracy is 0.035 ° or ± 0.0175 °. The guaranteed value is 0.06 °.
Uni-directional repeatability plot for SR50 Series stages. The typical (mean) Uni-directional repeatability is 0.003 °. The guaranteed value is 0.01 °.
Wobble plot for SR50 Series stages. The typical (mean) wobble is 40 µrad. The guaranteed value is 100 or ± 50 µrad.
Load Characteristics
|
SR50 Series
|
PR50 Series
|
| Normal Load Capacity (Cz) N |
30 |
10 |
| Construction parameter (a) mm |
25 |
22 |
| Transversal Stiffness (kα) µrad/Nm |
160 |
100 |
| Nominal Torque (Mz) Nm |
SR50CC: 0.4
SR50PP: 0.5 |
0.1 |
| Off-center load (Q) |
Q ≤ Cz/(1 + D/a) |
| Cantilever distance (D) mm |
Also applicable to the PR50 Series
XPS Series
|
Model |
Description |
| XPS-C2
|
2-axis Universal Controller/Driver, ethernet |
| XPS-C4
|
4-axis Universal Controller/Driver, ethernet |
| XPS-C6
|
6-axis Universal Controller/Driver, ethernet |
| XPS-C8
|
8-axis Universal Controller/Driver, ethernet |
| XPS-DRV01
|
PWM drive module for DC brush and stepper motors, 3A/48V max. |
Note: XPS-DRV01 is required for each axis with PR50 and SR50 stages.
ESP301 Series
|
Model |
Description |
| ESP301-1G
|
ESP301 Motor Controller/Driver, 1 axis, w/ GPIB and USB |
| ESP301-1N
|
ESP301 Motor Controller/Driver, 1 axis, USB |
| ESP301-2G
|
ESP301 Motor Controller/Driver, 2 axis, w/ GPIB and USB |
| ESP301-2N
|
ESP301 Motor Controller/Driver, 2 axis, USB |
| ESP301-3G
|
ESP301 Motor Controller/Driver, 3 axis, w/ GPIB and USB |
| ESP301-3N
|
ESP301 Motor Controller/Driver, 3 axis, USB |
SMC Series
|
Model |
Description |
| SMC100CC
|
Single-axis DC motor controller/driver |
| SMC100PP
|
Single-axis stepper motor controller/driver |
Note: Use SMC100CC for PR50CC/SR50CC and SMC100PP for PR50PP/SR50PP respectively. Refer to SMC series product page for power supply and available cable accessories
CONEX Series - Integrated Controller
|
Model |
Description |
| CONEX-SR50CC
|
SR50CC Rotation Stage Integrated with CONEX Controller |
| CONEX-PR50CC
|
PR50CC Rotation Stage Integrated with CONEX Controller |
