Aerotech NDrive HL linear drive maintenance replacement

Common faults and troubleshooting

Motor loss of control is usually related to the reverse connection of the encoder Sin/Cos, incorrect feedback direction, or incorrect commutation phase. The brushless motor does not rotate, and the common reason is that the relative order of motor A/B/C and Hall A/B/C is incorrect. The amplifier malfunctioned during motor deceleration, possibly due to excessive regenerative energy causing bus overvoltage, and requires evaluation or external regeneration treatment. Frequent amplifier failures may be caused by RMS overcurrent, overheating, or internal power supply faults, and current should be reduced, ventilation improved, or repaired.

LED is a fast diagnostic entry point: Limit+and LMT - indicate positive/negative limit, FAILT indicates axis fault, POS ERR indicates position error exceeding limit, ENABLE indicates axis enable, KERNEL indicates controller operation, RMS indicates RMS current exceeding limit, CLMT indicates current limited, INPOS indicates in place, ACTV indicates reset, Power indicates control power supply. Test point TP4 on the control board is for signal sharing. The motor power board test points include TP1+12V, TP2-12V, TP3+5V, TP4 common, and TP10-TP12 common for each phase. The fuses F1, F3, and R6 on the power board are welded, and F2 is a socket type. The motor power boards F1 and F2 are socket type, and F3 is welded. Battery B1 is a 3V button battery, model BR1225.

Engineering process for replacing discontinued modules

When replacing discontinued NDrive HL or other brands of linear servo modules, it is recommended to follow the following sequence:

Record original module parameters: model, peak/continuous current, bus voltage, AC input, feedback type, communication interface, I/O quantity, PSO axis number MXH/MXU、 Brake output, ESTOP logic, size, and heat dissipation.

Match motor: Confirm brushless/brushed/stepper, pole pairs Hall、 Encoder resolution, rotation or Inductosyn. If the original system uses a rotary converter, HL needs to choose - RDP; If using an analog sine encoder, choose - MXH.

Confirm power supply and regeneration: HL supports 100/115/200/230 VAC single-phase, optional - AUXPWR, - ENET, - IOPSO/- IOPSOH. Linear drives do not have internal shutdowns and require external processing of regenerated energy.

Confirm network: FireWire topology, S2 channel number, controller axis mapping. When Ethernet I/O is required, select - ENET.

Confirm I/O and PSO: When standard I/O is insufficient, select - IOPSO or - IOPSOH; Dual axis/three-axis laser trigger selection - DUALPSO/- TRIPLEPSO; PSO output optoelectronic isolator selects PSOOPTO1-4 based on speed/voltage.

Mechanical and Heat Dissipation: HL weighs approximately 22 pounds and requires one inch of free air space. The ambient temperature should not exceed 50 ° C, and the chassis temperature may exceed 75 ° C. Be careful of burns.

Power on test: Do not connect the motor first, check the LED, FireWire, ESTOP, and logic power supply; Connect the motor for low-speed testing of phase, feedback direction, limit, and PSO; Finally, gradually load and check the current, temperature, and tracking error.

If the original device uses PWM drivers, attention should be paid to the differences in HL: HL is a linear power level with low noise and zero crossover distortion, but it has lower efficiency and generates more heat, requiring stronger heat dissipation and regeneration treatment. CP is cost sensitive, HP supports higher current and rotation, MP has ultra compact DC input, and CL is cost sensitive linear. When replacing, it is not enough to only look at the installation size and current. Feedback, communication, and functional options must be checked.

Preventive Maintenance and FAQ

Preventive maintenance should check the chassis, cooling vents, cables, and connectors monthly. Turn off the power during cleaning, use a dry soft cloth, and if necessary, slightly wet water or isopropanol. Do not allow liquids to enter the connector. The internal high voltage may still exceed 60 V after a power outage, and maintenance must be carried out by qualified personnel.

NDrive HL 20-40、 How to choose between 10-40 and 10-80?

Select based on peak and continuous current, bus voltage: 20-40 is 20/10 A, ± 40 VDC; 10-40 is 10/5 A, ± 40 VDC; 10-80 is 10/5 A, ± 80 VDC.

Can I directly replace other brands of linear servo drives?

It cannot be judged solely based on current and size. It is necessary to verify the motor type, feedback, commutation, FireWire network, I/O, PSO, ESTOP, and regeneration processing.

Does HL support rotation?

Support, the - RDP rotary input option needs to be selected, providing single/dual channel, 10/7.5/5 kHz carrier frequency.

Can MXH and PSO be used simultaneously?

HL's MXH supports PSO and real-time orthogonal output, but attention should be paid to the 5 MHz tracking limit of multi axis PSO and MXH clock settings.

How to wire ESTOP?

TB201 input 5-24 V, driven by an external fail safe emergency stop circuit, with current limiting resistors in series if necessary, and noise suppression added.

How to connect a multi axis system?