美國NEWMARK RM-3系列旋轉工作臺由6061鋁合金加工而成，提供了一個輕便、堅固和穩定的平臺。RM-3有一個略高于2英寸厚的低輪廓。這個旋轉階段是接口與Nema 17電機，可以工廠安裝或由客戶安裝。RM-3采用蝸輪傳動，齒輪比為72:1。蝸輪是預加載的，以最大限度地減少齒隙在齒輪系
Specifications
| Resolution | Up to 0.29 arc-sec (depends on gear ratio and motor type) |
| Accuracy | 70 arc-sec |
| Max. Speed | Stepper Motor: 30°/sec (90:1 gear ratio), 50°/sec (45:1 gear ratio) Servo Motor: 100°/sec (90:1 gear ratio), 200°/sec (45:1 gear ratio) |
| Unidirectional Repeatability | 5 arc-sec |
| Bi-directional Repeatability | 45 arc-sec |
| Max Load Capacity | 20.4 kg (45 lbs) |
| Travel Range | 360° Continuous |
| Encoder | Optical rotary encoder mounted to rear of motor, 1000 lines (4000 CPR) with Index (Optional, Standard with servo motor) |
| Limit Switches | None |
| Origin | Optical Home Switch (optional) Optical index mark on encoder (with encoder option) |
| Gear Ratio | 90:1 or 45:1 |
| Stage Weight | 1.4 kg (3 lbs) |
| Material | Aluminum Alloy Construction |
| Finish | Black Anodize |
