Aerotech Ndrive HLe maintenance replacement

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

Confirm I/O and PSO: Select expansion board when standard I/O is insufficient; Dual axis/three-axis laser trigger selection - DUALPSO/- TRIPLEPSO; Need high-resolution encoder multiplication and real-time output selection - MXH; Need to rotate and select RDP.

Mechanical and heat dissipation: HLe has a large volume and requires sufficient heat dissipation space. Linear drives have low efficiency and generate significant heat, with ambient temperatures not exceeding 50 ° C. The chassis temperature may be high, so be careful of burns.

Power on test: Do not connect the motor first, check the logic power supply LED、FireWire、ESTOP； 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, upgrading to linear HLe can achieve lower noise and higher bandwidth, but it is necessary to evaluate heat generation, regenerative energy, and heat dissipation. If the original device uses ML, HLe provides more I/O, rotary encoders, absolute encoders, Ethernet, and multi axis PSO, but with higher volume and cost. Selection should not only be based on installation size and current, but also on feedback, communication, and functional options.

Common troubleshooting

Motor runaway or shaking: Check if the encoder Sin/Cos is connected in reverse, if the feedback direction is incorrect, and if the commutation phase is correct. 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. Swap any two-phase motor wires or Hall wires and perform phase testing again.

Over current or over temperature: Check if the acceleration is too fast, if the load is stuck, if the motor is short circuited, if the gain is too high, and if the commutation is correct. Linear drives require high heat dissipation, and overheating can be triggered when the ambient temperature exceeds 50 ° C, air ducts are blocked, or continuous current is too high. Ventilation should be improved and continuous current should be reduced.

Bus overvoltage: Linear drives do not have internal shutdowns, and regenerated energy must be processed externally. If the motor brakes frequently or is lowered vertically, an external shunt or regenerative resistor needs to be added. HLe and ML do not provide internal shutdowns, and external solutions must be calculated based on regenerative energy.

Communication failure: Check FireWire cable, ports, node sequence, and device number. FireWire networks are sensitive to topology and cable quality, and it is recommended to use a star daisy chain with up to 16 drivers per chain and up to 32 axes. After replacing the drive, confirm that the firmware version and configuration file are compatible.

PSO not triggered: Confirm if the PSO option is correct. HLe supports single axis standard, dual axis/three-axis optional; ML is only single axis. PSO is not available when using MXU. Check the PSO output wiring, optoelectronic isolation options, trigger position, and controller configuration.

ESTOP alarm: The ESTOP input requires an external fail safe circuit, with an input of 5-24 V. If it exceeds this range, a series resistor current limiting is required. If ESTOP is enabled in FaultMask, this input must be driven to avoid faults. Check the external safety relay and 24V logic.

Abnormal braking: HLe automatic braking control standard, ML optional. Check the specifications of the brake relay, suppression diode or RC network, brake power supply, and brake pins. Inductive loads must be suppressed, otherwise they may damage the relay contacts.

In terms of maintenance, the chassis, cooling vents, cables, and connectors should be checked 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. Internal high voltage may still exist after a power outage, and maintenance must be carried out by qualified personnel.

FAQ

How to choose between HLe and ML?

HLe is selected when rotary encoders, absolute encoders, multi axis PSO, Ethernet, and more I/O are needed; ML is selected when ultra small size, DC power supply, and single axis PSO are required.

Does HLe support rotation?

Support, RDP option needs to be selected, providing single/dual channel, 10/7.5/5 kHz carrier frequency, and 16 bit resolution.

What is the maximum multiplication of HLe's encoder?

MXH up to x65536, with real-time orthogonal output. ML can choose MXU up to x4096 or MXH up to x65536.

Can PSO and MXU be used simultaneously?

PSO is not available when using integrated MXU in ML. HLe's MXH is compatible with PSO and real-time output, making it more suitable for applications that require both multiplication and triggering.

What absolute encoders does HLe support?

Supports Renishaw Resolute BiSS, EnDat 2.1, and EnDat 2.2.

How to connect a multi axis system?

Through FireWire star daisy chain, up to 32 axes, a single chain of 16 drivers, with each driver assigned a unique device number. HLe can optionally connect to third-party I/O via Ethernet.