Medtronic M2 Power Handle 18-97200 Repair Case

I. Basic Information

Date: January 21, 2025

Device Model: Medtronic M2 Power Handle 18 - 97200

II. Appearance Inspection

A detailed visual inspection of the handle's appearance revealed signs of wear on the handle's surface caused by normal use. These wears are mainly concentrated in the grip and the edges of the interface connecting to other devices, showing slight scratches and paint wear, and there are no problems such as shell cracks and deformation that affect the overall structural integrity of the device.

III. Fault Phenomenon

After connecting the handle to the test host and turning on the device, the handle motor starts immediately, but the rotation is obviously abnormal. The motor speed shows irregular fluctuations, not stable and uniform operation. After only a few seconds, the test host issued an error prompt, and the handle motor stopped rotating completely. The error message is related to the operating status of the handle motor, indicating that there is a fault inside the handle that affects the normal operation of the motor.

IV. Technical Testing

In order to comprehensively and accurately determine the cause of the fault, a series of professional testing instruments and technical means were used to conduct in-depth testing of the handle.

Motor electrical performance testing: A high-precision resistance tester was used to measure the resistance value of the three-phase winding of the motor. The results showed that there was an obvious imbalance in the three-phase resistance value. Under normal circumstances, the three-phase resistance value of the motor should be kept within a very small error range, but the test results this time showed that there was a problem with one or more phases of the winding. Further testing was performed using a turn-to-turn short-circuit tester to clearly determine that the handle motor coil had turn-to-turn short-circuit breakdown damage. This fault will cause uneven distribution of motor current, abnormal heating and electromagnetic force, and thus affect the normal operation of the motor.

Mechanical component testing: Disassemble the handle and conduct a detailed inspection of the internal mechanical running components. With the help of professional microscopes and precision measuring tools, it was found that there were obvious signs of wear on the surface of the running bearing, the smoothness of the raceway surface decreased, and there were tiny pits and peeling, which will directly cause the bearing to generate greater friction and vibration during operation. At the same time, the running assembly also has different degrees of wear and damage, and the dimensional accuracy of its key parts has changed, affecting the stability and accuracy of the entire mechanical transmission system.

V. Inspection Conclusion

Combined with the appearance inspection, observation of the fault phenomenon and technical test results, it is determined that the cause of the failure of the Medtronic M2 power handle 18-97200 is the damage of the motor and mechanical running parts and bearings. The electrical failure of the motor and the wear of the mechanical parts affect each other, which together cause the handle to fail to work properly.

VI. Repair plan

Parts replacement

Select a high-quality motor that fully matches the original model for replacement to ensure that the various electrical performance parameters of the motor meet the requirements of the equipment and provide stable and reliable power output for the handle.

Replace the worn and damaged running bearings and use high-precision and high-wear-resistant bearing products to ensure the smoothness and stability of the mechanical transmission. At the same time, replace the special seals to prevent external dust, liquids and other impurities from entering the handle and affecting the performance and service life of the equipment.

Replace the running assembly as a whole and select new assembly parts that have undergone strict quality inspection to ensure that their dimensional accuracy and mechanical properties meet the requirements for normal operation of the equipment.

Precision assembly and debugging

After the replacement of parts is completed, the parts are precisely assembled in accordance with strict assembly process requirements. Ensure that the installation position of each part is accurate and the matching clearance between the parts meets the design standards. During the assembly process, use professional assembly tools to avoid secondary damage to the parts due to improper operation.

The mechanical parts of the assembled handle are debugged, and the mechanical transmission system is finely adjusted through professional debugging equipment and tools to ensure coordinated and smooth movement between the parts. At the same time, the lubrication load capacity is debugged. According to the operating requirements of the equipment, the appropriate lubricant is selected, and the amount and position of the lubricant are accurately controlled so that each moving part can be fully lubricated during operation, reducing friction and wear, and improving the working stability coefficient of the equipment. After multiple rounds of debugging and testing, it is ensured that the handle can operate stably and reliably under different load conditions to meet the normal use requirements of the equipment.

Through the above maintenance plan, it is expected that the Medtronic M2 power handle 18-97200 will be restored to normal working condition, providing reliable equipment support for subsequent clinical use or other related work.