Application Case of Integrated Stepper Servo Motor in Laparoscopic Surgical Robot System

With the rapid development of minimally invasive surgical techniques, laparoscopic surgical robot systems have been widely adopted in the medical field due to their advantages of precise operation, minimal trauma, and fast recovery. As core actuation components in mechatronic systems, stepper motors play a vital role in the positioning and control of surgical robots, offering high precision, no cumulative error, and simple control.

1. Equipment Introduction

A laparoscopic surgical robot system consists of three parts: the surgeon's console, the patient-side surgical platform, and the image processing platform. The surgeon's console uses stepper motors to drive lead screw modules, enabling horizontal and vertical movement to assist the surgeon in adjusting to the optimal operating position. Stepper motors convert electrical pulse signals into angular or linear displacement, achieving precise positioning and speed control. Their microstepping drive technology further optimizes operational smoothness, reduces vibration and noise, and meets the high-reliability requirements of medical applications.

2. Application Solution

(1) Motor Selection and Integration
An integrated stepper servo motor, model STMP5756B-COE-MA-0FSB-04, is selected. It supports the EtherCAT communication protocol to ensure real-time control and high synchronization.

(2) Function Implementation
The motor-driven lead screw module completes the horizontal and vertical positioning of the surgeon's console with an accuracy of ±0.1mm, meeting the stringent requirements for minute displacement during surgery.

3. Application Product

• Core Product: Integrated stepper servo motor (STMP5756B-COE-MA-0FSB-04), featuring:

  • Holding Torque: Ensures load capacity during low-speed operation, adapting to inertial loads during console adjustment.

  • Step Angle: Achieves micron-level positioning through microstepping drive adjustment of pulse equivalent.

  • Communication Protocol: EtherCAT enables multi-axis synchronous control, preventing position loss.

4. Summary

1. Technological Value: The integrated stepper servo motor significantly enhances the operational safety and efficiency of laparoscopic surgical robots through high-precision positioning, low-vibration operation, and intelligent control.

2. Application Prospects: As mechatronics technology continues to advance, the application of stepper motors in the medical robotics field will further expand, particularly in multi-axis collaboration and force-feedback integration.

3. Case Implications: The innovative application of stepper servo motors not only addresses technical pain points in traditional medical equipment but also provides important support for the domestic substitution of high-end medical devices.