Aerotech Ndrive HLe maintenance replacement

Aerotech Ndrive HLe maintenance replacement

In precision motion control systems, linear servo drives undertake the key tasks of low noise, high bandwidth, and zero crossover distortion. Aerotech Ndrive HLe is a high-performance linear digital driver in the Automation 3200 motion system, supporting brushless, brushed, stepper, and voice coil motors. It has a closed digital current loop, speed loop, and position loop, making it suitable for equipment with extremely high dynamic performance requirements such as optical inspection, semiconductor processing, nanopositioning, and laser microfabrication. When the original drive is discontinued, malfunctions frequently, or the system needs to be expanded, engineers must accurately understand the specifications, feedback, I/O, PSO, and replacement logic of HLe in order to avoid selection errors and downtime losses.

The positioning and core specifications of Ndrive HLe

Ndrive HLe belongs to the linear high-performance branch of the Ndrive family, and together with Ndrive ML, forms a low-noise linear drive scheme. HLe supports 2-phase or 3-phase AC input, with a motor power supply of 115/230 VAC, 50/60 Hz, factory configured; The control power supply is 85-240 VAC, 50/60 Hz, used for logic circuits and "keep active" power supply. The bus voltage covers ± 40, ± 60, and ± 80 VDC, depending on the model.

The main models of HLe include 10-40, 20-40, 10-60, and 10-80. 10-40 peak output 10 A, continuous 5 A, bus ± 40 VDC; 20-40 peak 20 A, continuous 10 A, bus ± 40 VDC; 10-60 peak 10A, continuous 5A, busbar ± 60 VDC; 10-80 peak 10A, continuous 5A, bus ± 80 VDC. All models are of linear power level, with a minimum load inductance of 0 mH, suitable for low inductance linear motors and voice coil motors. The current loop update rate is 20 kHz, the servo loop update rate is 8 kHz, and the power amplifier bandwidth can be selected by software. The working temperature is 0-50 ° C, and the storage temperature is -30-85 ° C.

HLe has passed CE certification, NRTL safety certification, and complies with the EU 2015/863 RoHS 3 directive. Unlike PWM drivers, linear power stages have no switching noise, extremely low EMI/RFI emissions, better speed regulation and position stability, but lower efficiency and generate more heat, requiring sufficient heat dissipation space.

Comparison of Differences between HLe and ML

Ndrive ML is the smallest linear drive in the series, with a width of 92.1 mm and a height of 141.0 mm, suitable for devices with extremely limited space. The ML motor power supply is DC, with a maximum of ± 40 VDC; The control power supply is 18-36 VDC. Peak output 10 A, continuous 5 A, bus ± 40 VDC. Standard I/O only has one 16 bit differential analog input, while digital I/O requires an expansion board. Extended I/O includes 8 digital inputs, 8 digital outputs, 1 16 bit analog input, and 1 16 bit analog output, and supports auxiliary encoders and PSO outputs.

HLe is 206.9 mm wide and 234.3 mm high, with a wider range of standard I/O options: 6 optically isolated digital inputs (including 2 high-speed), 4 optically isolated digital outputs, 1 16 bit differential analog input, and 1 16 bit single ended analog output. Expand I/O to include 16 digital inputs, 16 digital outputs, 3 16 bit analog inputs, and 3 16 bit analog outputs. HLe standard configuration automatic brake control, 24 V @ 1 A; ML's automatic braking is optional. HLe optional Ethernet port for third-party I/O expansion and PLC type applications; ML does not provide Ethernet. HLe supports dual axis and three-axis PSO options, while ML only supports single axis PSO. HLe can choose 1 or 2 channel rotary converter interfaces with 16 bit resolution; ML does not provide a rotation interface. HLe supports Renishaw Resolute BiSS, EnDat 2.1, and EnDat 2.2 absolute encoders; ML does not provide an absolute encoder interface.

In terms of encoder multiplication, HLe can choose MXH, with a maximum of x65536 and real-time orthogonal output. ML can choose MXU up to x4096 or MXH up to x65536 with real-time orthogonal output. HLe main encoder input supports 32 MHz square wave standard or 500 kHz sine wave (MXH). The ML main encoder input supports 32 MHz square wave standard or 2 MHz sine wave (MXU or MXH). Both sub encoders are 32 MHz square waves. If the original system uses rotary encoders, absolute encoders, multi axis PSO, or Ethernet, HLe is a more suitable choice; If the space is extremely small, DC power supply, and single axis PSO, ML has more advantages.

Power supply, motor, and feedback wiring

HLe requires motor power and control power. The motor power supply is 115/230 VAC, factory configured; Control the power supply to 85-240 VAC. If the motor power supply is cut off by the emergency stop circuit, the control power supply can still maintain communication and encoder power supply, achieving controlled stop and status monitoring. During installation, it is necessary to ensure safe grounding, grounding of the motor frame and shielding layer, and physical isolation of the signal line from the motor line and AC power line.

HLe supports brushless, brushed, stepper, and voice coil motors. When wiring brushless motors, motor A/B/C and Hall A/B/C must correspond correctly. The forward motion command should cause the motor to rotate clockwise when viewed from the mounting flange. If the direction is opposite, any two-phase motor wires can be exchanged. Hall signal connected to feedback connector, if the status (0,0,0) or (1,1,1) is invalid, it will trigger a Hall fault. The encoder phase must be consistent with the direction of motor rotation; The encoder count should increase during forward motion. If the count decreases, Sin and Sin-N can be exchanged, or the feedback direction parameter can be taken. Connect the positive lead of the brushed motor to OA and the negative lead to OC; pay attention to the common connection and two-phase winding of the stepper motor. The limit switch includes CW, CCW, and Home, connected to a feedback connector. Positive motion is stopped by the CW limit, and negative motion is stopped by the CCW limit. If the limit direction is opposite, switch the CW and CCW wiring.