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RM-3 Low Temperature Rotary Stage





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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.

Thermal Chamber

Envirotronics Thermal Chamber

Ordering

RM-3 Part Number Configuration
Select a gear ratio and motor type.

Typical lead-time: 4 Weeks
Clear
Qty
Part Number: N/A

Specifications

Resolution
0.29 arc-sec (90:1 gear ratio, 250 microsteps)
Accuracy
180 arc-sec
Max. Speed
Stepper Motor: 25°/sec (90:1 gear ratio), 45°/sec (45:1 gear ratio)
Unidirectional Repeatability
10 arc-sec
Backlash
103 arc-sec
Max Load Capacity
20.4 kg (45 lbs)
Travel Range
360° Continuous
Encoder
Optical rotary encoder mounted to rear of motor, 4000 CPR with Index
Limit Switches
None
Origin
Optical Home Switch
Index mark on encoder 
Gear Ratio
90:1 or 45:1
Stage Weight
1.4 kg (3 lbs)
Material
Aluminum Alloy Construction
Finish
Black Anodize
Operating Temperature
-50°C to 70°C

* Specifications are at room temperature (23°C)

Dimensions

RM-3 Motorized Rotary Stage
RM-3 Motorized Rotary StageClick to Enlarge

Motor Options

msl_stepper-motor

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

CAD Files