GrabCAD 模型信息
Closed-Loop NEMA 17 Planetary Actuator · 模型 97337
This model presents a compact, high-torque planetary actuation mechanism driven by a NEMA 17 closed-loop stepper motor and controlled using the ZDT NEMA 17 Closed-Loop Stepper Motor Driver V4.2. The motor is directly connected to a 12-tooth sun gear, which drives the surrounding 24-tooth planet gears. The planet gears rotate inside a fixed 60-tooth internal ring gear, transferring the reduced-speed, increased-torque motion to the planet carrier. Planetary Gear Configuration Gear module: 1 mm Sun gear: 12 teeth Planet gears: 24 teeth Internal ring gear: 60 teeth Ring gear condition: Fixed Input: Sun gear Output: Planet carrier Motor: NEMA 17 stepper motor Control system: ZDT Closed-Loop Stepper Driver V4.2 The gear geometry follows the standard planetary relationship: Ring Gear Teeth = Sun Gear Teeth + 2 × Planet Gear Teeth 60 = 12 + 2 × 24 Gear Reduction Ratio With the ring gear fixed, the sun gear used as the input, and the planet carrier used as the output, the transmission ratio is: Gear Ratio = 1 + Ring Gear Teeth / Sun Gear Teeth Gear Ratio = 1 + 60 / 12 = 6:1 This means the planet carrier rotates approximately once for every six rotations of the motor shaft. Ignoring mechanical losses, the gearbox can theoretically increase the output torque by approximately six times while reducing the output speed to one-sixth of the motor speed. Approximate Pitch Diameters Since the gear module is 1 mm: Sun gear pitch diameter: 12 mm Planet gear pitch diameter: 24 mm Ring gear pitch diameter: 60 mm Sun-to-planet center distance: 18 mm Key Features Compact coaxial planetary drivetrain 6:1 speed reduction Significant output torque multiplication Closed-loop position feedback Reduced risk of missed steps Improved low-speed motion and positioning reliability Fixed internal ring gear integrated with the housing Suitable for robotic joints, grippers, rotary actuators, automation systems, and precision mechanisms The combination of a closed-loop NEMA 17 motor and a planetary transmission provides a compact actuator architecture with improved torque density, positioning reliability, and mechanical robustness.
- 格式
- SOLIDWORKS、Rendering
- 分类
- Machine design、Robotics、Tech
- 标签
- 未标注
- 数据更新
- 2026-10-14T10:04:43Z
