KOLLMORGEN AKM series synchronous servo motor

Check the flexibility of the shaft rotation (without jamming or abnormal noise), and ensure that no liquid enters the upper bearing when installing V3 (with the shaft end facing upwards).

（2） Electrical wiring specifications

Wiring sequence and safety

Power off operation, ensure that the servo amplifier capacitor discharges (after power off for ≥ 5 minutes, measure the DC bus voltage<40V), and the motor junction box needs to be reliably grounded (PE wire cross-section>10mm ² or double PE wiring).

The distance between the power cable and the control cable is ≥ 20cm. If the power cable contains a brake control line (such as 4 × 1+2 × 0.75mm ²), it needs to be shielded separately and grounded at both ends.

When the cable length exceeds 25m, Kollmorgen 3YL-20 choke coil is required (such as SERVOSTAR 601-606 with 4 × 1mm ² cable, 620 with 4 × 2.5mm ² cable).

Core interface definition

Power interface: 4+4-pole circular connector (AKM1/2 for straight head, AKM3+for elbow), U/V/W connected to motor three-phase winding, PE connected to motor casing, brake wire (± BR) connected to 24V DC (only for brake models).

Feedback interface: The rotary transformer uses a 12 pole circular connector, with R1/R2 as the reference signal, S1/S2 as the sine signal, S3/S4 as the cosine signal, and COM ± as the power supply; The EnDat encoder uses a 17 pole connector, which includes clock (CLK ±), data (DAT ±), and power supply (+5V/0V).

Typical Connection Diagram 

Rotary transformer motor: The power end U/V/W/PE is connected to the amplifier output, the feedback end R1/R2/S1/S2/S3/S4 is connected to the amplifier rotary transformer interface, and the PTC thermistor is connected in series to the amplifier overheat protection circuit.

Encoder motor: The encoder clock/data line is connected to the amplifier interface and needs to be separately shielded (with both ends of the shielding layer grounded) to avoid parallel wiring with the power cable.

System debugging and maintenance

（1） Debugging process

Pre inspection

Confirm that the motor is matched with the amplifier (rated voltage and current are consistent), the wiring conforms to the diagrams, and the brake can be released normally after being powered on (no jamming at 24V).

Manually rotate the motor shaft, confirm that there is no mechanical blockage, monitor the bearings for any abnormal noise, and check that the heat dissipation channel is unobstructed (ambient temperature ≤ 40 ℃).

Amplifier configuration

Load motor parameters through SERVOSTAR software (Kollmorgen motor automatically recognizes, third-party motors require manual input of rated torque, inductance, etc.), set the resolution and pole number of the rotary/encoder (to match the actual motor, incorrect settings may burn out the motor).

Perform motor recognition and automatic tuning, optimize current loop and speed loop gains, and conduct multi axis linkage testing after single axis debugging is completed.

Functional Verification

Jogging test: Run at low speed (<100min ⁻¹), confirm that the steering and torque output are normal, monitor the motor temperature (≤ 100 ℃ during operation, cool to 40 ℃ after shutdown and touch again).

Brake test: When the power is cut off, the brake should be immediately applied, and the release should be delayed by ≤ 100ms after power on. The vertical axis should be tested for no load drop after power off (with dual protection of mechanical braking).

（2） Maintenance and Lifecycle Management

routine maintenance

Check the bearing noise every 2500 operating hours or annually. If any abnormal noise occurs, stop the machine and replace the bearing (the bearing grease has a lifespan of 20000 hours and needs to be replaced if it exceeds the deadline).

Wipe the outer shell with isopropanol during cleaning (do not soak or spray), and avoid using solvents such as trichloroethylene and nitro diluents (which may damage the RAL 9005 matte black paint coating).

Storage and transportation

Storage conditions: Temperature -25~+55 ℃, humidity 5%~95% (no condensation), original packaging stacking height not exceeding the limit (such as AKM1/2 stacking 10 boxes, AKM6/7 stacking 1 box), storage period unlimited.

Transportation requirements: Climate category 2K3, temperature -25~+70 ℃ (temperature change rate ≤ 20K/hour), avoid impact, and inspect the appearance of the motor for packaging damage (such as no deformation of the shaft end and flange).

Retirement disposal

According to the requirements of the WEEE directive, qualified electronic waste processors can be used for recycling. They can contact service centers in Kollmorgen to obtain recycling channels (such as sending from Europe to Ratingen factory in Germany and from China to Minhang district office in Shanghai).

Troubleshooting

Common fault handling

Possible causes and solutions for the fault phenomenon

The motor does not rotate. The amplifier is not enabled; 2. The set value signal line is broken; 3. The brake is not released; 4. Motor phase sequence error 1. Sending ENABLE signal; 2. Check the continuity of the set value cable; 3. Confirm that the brake is powered by 24V; 4. Swap the U/V phase sequence