GR-XA Crossed Roller Positioning Stage
- Worm gear drive with self-aligning flexure in 45:1, 90:1, or 180:1 ratios
- Crossed roller bearings for high load capacity and rigidity
- Hard-coat anodized top plate with solid, through hole or custom mounting surface
- Motor mounting for NEMA23 frame servo or stepper motor
- Magnetic reed switch home sensor included
- Optimize your design with a variety of gear ratio, encoder & multiplier options
- Repeatability to ± 0.2 arc-minute
- Ideal for:
- Rotary Indexing Applications
- Automated Assembly
Compact Rotary Positioning Stage
Anorad's GR-XA rotary positioning stages are designed for precise positioning and heavy load applications requiring continuous or programmable motion. The GR-XA rotary stage utilizes a revolutionary stainless steel crossed roller bearing with a unique preloaded worm gear drive to provide excellent stiffness in a variety in mounting orientations.
The GR-XA's low profile construction helps minimize Abbé offset errors when stacked on a supporting stage while its aluminum alloy construction reduces overall system weight. The crossed roller radial bearing provides extremely smooth rotary motion with rigidity and load capacity greater than many competitive stages. Additionally, the selection of gear ratios allows for optimization of speed and load capacity in any given application.
The GR-XA rotary stage offers several design features that provide unrivaled performance in its class. The unique worm gear uses a self-compensating factory set preload that allows users to achieve rotary positioning of ± 2 arc minutes. The GR-XA is well suited for many applications requiring precise positioning, heavy load capacity or automated rotary motion.
| GR-XA 6 Crossed Roller Rotary Stage Performance Specifications 1 |
Average Accuracy of Position
|
± 2 arc minutes (with 500 lines/rev encoder) |
| Repeatability 2 |
± 0.2 arc minute unidirectional
± 0.4 arc minute bidirectional |
| Flatness of Rotation 3 |
± 12.5 microns |
| Load Capacity: |
Horizontal |
|
Vertical |
|
| 45 kg (speed and gear ratio dependent) |
| 23 kg (speed and gear ratio dependent) |
|
| Input Torque Required |
0.07 to 0.11 N-m |
| Stage Weight (without motor) |
3.6 kg |
| Home |
Home magnetic reed switch |
| Speed vs. Load |
| Gear Ratio |
Max Speed |
Load @ Max Speed
|
Max Load @ Low Speed |
| 45:1 |
30 RPM |
4.5 kg |
34 kg @ 10 RPM |
| 90:1 |
10 RPM |
11 kg |
45 kg @ 5 RPM |
| 180:1 |
7 RPM |
11 kg |
45 kg @ 3 RPM |
| Options |
| Limit Switch Option LS-1 (under 320°) |
Limit switch (normally open and closed output) |
|
| Rotary Encoder Option RE-500/1000 |
500 and 1000 line encoder |
(Encoders are easily applied to the back of the motor to accurately read positions
for motion profiles.) |
|
| Motor Options: |
2302 |
Step motor (includes cable and connector) |
|
5302 |
Brushed servo motor |
|
1616 |
Brushless servo motor |
|
| Concentricity at Center Hole |
± 5 microns |
|
Top Plate Options
(please specify): |
- Standard Plate / Standard Through Hole
- Thick Plate / Standard Through Hole
- Standard Solid
- Thick Solid
- Custom (as specified)
|
|
- All specifications are based on measurements taken while the unit is mounted to a surface, flat within 2.5 µm.
- Repeatability is achieved provided the motor and drive resolution is better than 0.1 arc minute
- Flatness of rotation is measured while stage is mounted to a flat granite table. The indicator base is placed on the granite and the indicator needle is placed on the edge of the GR-XA top plate (approximately 75 mm from the center). While the stage may rotate flat, this specification does not apply to the parallelism of the top plate to the base.
Dimensions (mm)
