Product Videos
RM-3 Low Temperature Rotary Stage
This version of the RM-3 is designed to operate from -50°C to 70°C. To achieve this temperature range, we use a specially designed stepper motor, Molykote 33 grease on all bearings and worm gear, and the housing is also modified to allow proper bearing fit at -50°C. The RM-3 design takes advantage of a single preloaded crossed roller bearing for the table movement. This design approach eliminates the use of a dual bearing configuration thus improving on axial runout and wobble. This rotary table utilizes a worm gear drive with available gear ratios of 90:1 and 45:1. The RM-3 is available with an optical home switch and 4000 CPR rotary encoder.
We use an Envirotronics thermal chamber to verify operation of each stage at the temperature extremes.
Envirotronics Thermal Chamber
Specifications
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Resolution
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0.29 arc-sec (90:1 gear ratio, 250 microsteps)
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Accuracy
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±72 arc-sec
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Max. Speed
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Stepper Motor: 25°/sec (90:1 gear ratio), 45°/sec (45:1 gear ratio)
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Unidirectional Repeatability
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10 arc-sec
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Backlash
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125 arc-sec
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Max Load Capacity
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20.4 kg (45 lbs)
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Travel Range
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360° Continuous
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Encoder
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Optical rotary encoder mounted to rear of motor, 4000 CPR with Index
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Limit Switches
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None
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Origin
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Optical Home Switch
Index mark on encoder |
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Gear Ratio
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90:1 or 45:1
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Stage Weight
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1.4 kg (3 lbs)
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Material
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Aluminum Alloy Construction
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Finish
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Black Anodize
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Operating Temperature
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-50°C to 70°C
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* Specifications are at room temperature (23°C)
Motor Options
Size 17 Stepper Motor
- NEMA 17 high torque brushless motor
- 0.95 Amp/Phase
- 5.0 Ohm/Phase
- 3.1 mH/Phase
- 1.8 degrees/step
- -50°C to 80°C
- Compatible with the following motion controllers:
NSC-A1 Series | NSC-A2L Series | NSC-G Series