Servo motor reducer selection guide - Solutions - Huaqiang Electronic Network

Single chip microcomputer STM32L151CCU6

Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

SMD aluminum electrolytic capacitor

MOS power IC full range

One-piece inductor

When selecting a geared motor, it's essential to understand the technical specifications of the driven machine and determine the use factor fB. This helps ensure that the motor is properly matched to the application's demands.

The selection process should begin by identifying key technical parameters such as daily operating hours, number of start-stop cycles per hour, operation cycle, reliability requirements, working machine torque T, output speed n_out, load type, ambient temperature, and heat dissipation conditions. Reducers are typically designed for constant torque, infrequent starts, and normal temperatures.

The allowable output torque T is calculated using the formula: T = T_out × fB, where T_out is the motor's output torque and fB is the usage coefficient. Additional factors like load characteristics, reliability, and ambient temperature also influence the total usage factor (fB_total = fB × fB1 × KR × KW). The motor must meet two main conditions: T_out ≥ T_working_machine and T = fB_total × T_working_machine.

Proper installation is crucial for the reducer's performance and longevity. Ensure alignment between the drive center and the coupling, keeping misalignment within the coupling's compensation range. Misalignment can reduce efficiency and shorten the life of the system. When installing components on the output shaft, avoid hammering—use assembly jigs and bolts instead. Steel fixed couplings should be avoided, as they can cause unnecessary stress and damage to bearings or even break the output shaft.

Mount the reducer on a stable, level base and ensure proper ventilation and oil drainage. A weak foundation can lead to vibration, noise, and damage to internal components. If the reducer uses gears, sprockets, or protrusions, install protective devices. If the output shaft experiences large radial loads, consider a reinforced model.

Make sure all maintenance access points—such as the oil level, vent, and drain plugs—are easily reachable. After installation, check the alignment and fasteners thoroughly. The reducer is usually lubricated via oil splash. Before starting, remove the vent plug and replace it with a proper one. Check the oil level according to the installation position, fill until oil flows out, and secure the plug. Run the unit for at least 2 hours, ensuring smooth operation without vibration, noise, or leaks. Address any issues immediately.

After some time, recheck the oil level to prevent leakage. Adjust the oil grade if the ambient temperature is too high or low. Regular oil checks and changes are necessary for optimal performance. New reducers come pre-filled with L-CKC100–L-CKC220 gear oil. After 200–300 hours, change the oil and continue checking its quality regularly. Replace contaminated or degraded oil promptly. For long-term continuous use, change the oil every 5000 hours or once a year. If the reducer has been idle for a long time, refill with the same oil grade before restarting.

During operation, if the oil temperature rises above 80°C or the oil pool exceeds 100°C, stop the motor immediately. Investigate the issue, fix it, and replace the oil before resuming. Maintain clear records of operations and inspections to ensure proper maintenance. During the first 200 hours of use, drain and replace the lubricant to maintain the correct oil level. An incorrect oil level can cause overheating and reduce efficiency.