SIGMATEK AKM Servo Motor Replacement and Troubleshooting Guide

6. Resolver error message

The system prompts a rotary transformer error, which is commonly caused by incorrect connection of the rotary transformer plug or broken or crushed rotary transformer cable. Carefully check whether the plug pins are bent or retracted, use a multimeter to check cable continuity, and replace the rotary cable if necessary.

7. Motor temperature error message

When the motor temperature sensor (PTC) triggers an error, it means that the motor is overheating. Wait for the motor to cool down and investigate the cause of overheating (such as overload, poor heat dissipation). In addition, loose rotary plugs or broken rotary cables may also cause false alarms of temperature signals. Check the connector and install a new rotary cable if necessary.

8. The brakes don't engage

If the brake cannot lock after the motor stops, it may be due to the required stopping torque being too high, exceeding the rated capacity of the brake; Or the brake itself may have been damaged. Mechanical installation should be checked for compliance with requirements. If it is confirmed that the brake is damaged, the motor needs to be replaced.

Debugging checklist and long-term maintenance strategy

1. Initial startup checklist

Before formal operation, please make sure to check according to the following checklist:

Check the installation and alignment of the motor to ensure that the driving components (couplings, gears, pulleys) are securely fastened and set correctly (radial and axial forces within tolerance).

Check the wiring of the motor and servo amplifier to ensure a good grounding connection.

Check if the brake function is normal (apply 24V voltage, the brake should be released by ventilation).

Check if the motor rotor can rotate freely (release the brake first) and listen for any grinding noise.

Ensure that all measures have been taken to prevent contact between moving parts and live parts.

2. Eliminating Interference

In a multi axis system, invisible interference sources may cause system instability. If there are abnormalities during the adjustment process, it is mostly due to incorrect parameter settings in the servo amplifier. You should carefully read the servo amplifier documentation and use debugging software for optimization. In a multi axis system, the mutual interference between each axis also needs to be taken seriously, and if necessary, the manufacturer's application department can be contacted to assist in resolving it.

3. Lifecycle maintenance

The lifespan of servo motors largely depends on the condition of the bearings.

Bearing replacement: Under normal operating conditions, bearings should be replaced after 20000 hours of motor operation (must be carried out by the manufacturer).

Regular inspection: Check the motor every 2500 operating hours or annually and listen for any noise from the ball bearings. If an abnormal sound is heard, the motor cannot continue to operate and the bearings must be replaced.

Warranty warning: It is strictly prohibited to open the motor without authorization. Once the motor is opened, the warranty will immediately become invalid. The maintenance of the motor must be carried out by the manufacturer.

Cleaning and maintenance: When cleaning the casing, isopropanol or similar cleaning agents can be used, but it is strictly prohibited to immerse or spray the motor.