The DSP-based ML range has been designed so that, thanks to minimal noise emitted, the servo system can provide exceptional levels of speed control and position stability to ultra-smooth motion profiles, and ensure negligible levels of interference in sensitive equipment processing and measurement.
Three versions to tackle different levels of application.
Suitable for very high-resolution motion system applications, such as non-destructive testing, micro electromechanical systems (MEMS), vision systems, and microscopes, but with less demanding dynamic performance requirements, the new amplifier is available in three versions: as the Ndrive ML option for Aerotech's A3200 motion-only controller software; as a basic version of the Soloist™ ML range of integrated single-axis positioning controllers; and as a low-cost linear drive benchtop solution for the multi-axis Ensemble™ ML range, a panel-mountable and networkable motion control system.
The basic specifications of the ML series linear amplifiers in all configurations include a continuous current rating of 5 A/10 A peak with a customer-supplied DC distribution voltage of ±40 V and a control supply requirement of 18-36 V DC. A single 16-bit, ±10 V analog input is used to directly connect the motion controller with the included ESTOP detection input.
The ML range incorporates primary and secondary incremental encoding interfaces that are optionally equipped with Aerotech's MXH hardware-based multiplier encoding technology for quadrature output up to 65,536 times. Using a 1V peak-to-peak sinusoidal encoder that does not require an expensive power supply, this level of multiplication features a 2 MHz analog input frequency, enabling nanometer-level or microradian-level resolution across Aerotech's broad range of high-precision, direct-drive positioning mechanical products without sacrificing maximum speed.
The MXH encoding option also enables the implementation of single-axis synchronized position output with the highest level of accuracy. Aerotech's synchronized position output is a powerful software tool that precisely coordinates the real-time position of a linear or rotary encoder with high-speed output pulses from the controller used to trigger external events. This function is widely used in applications such as laser micromachining or critical non-destructive testing where precise and risk-free synchronization between laser activation or sensor reading and the axis path position is required.
In the case of the alternative software-based MXU encoder version, the encoding interfaces feature a 4096 multiplier, and both the MXU and MXH encoding options include end-of-travel limiters and basic inputs on the main feedback encoder. An optional I/O expansion card is also included in the ML unit with eight opto-isolated digital inputs and eight digital outputs (absorption or generation), in addition to simple 16-bit analog inputs and outputs and a brake relay output.
Since the ML series linear table amplifier does not include an integrated power supply and the I/O expansion option may not be required in certain applications, the drive can be a low-cost solution; in addition, its small footprint can be an advantage in OEM applications with limited space.
The ML unit's 10 A peak current rating provides more than enough power for most micropositioning applications; however, for situations requiring more power and in areas where amplifier temperature rise must be kept to a minimum, a water-cooled version is available. This version can deliver up to 35% more usable power.
In addition to the ML series, Aerotech also produces linear table amplifiers with 2- and 3-axis synchronized position output, integrated power supply, and integrated fieldbus and I/O interfaces. These amplifiers offer the excellent linearity, wide bandwidth, zero transverse distortion, and extremely low EMC characteristics of the ML series. These versions, with control options and increased power, are available in the A3200, Soloist, and Ensemble series. Furthermore, Aerotech offers a wide range of PWM table amplifier add-ons for high-speed, heavy-duty precision positioning applications.
All of these Aerotech technologies can be freely combined in multi-axis positioning systems, ensuring cost and performance optimization for each axis. A suite of PC-based software programs and single-axis or multi-axis rack- or panel-mounted motion controls enable optimal performance with comprehensive diagnostic options and functions designed to ensure rapid product development and commissioning, reduce positioning errors, improve production capacity, and guarantee profits through time savings and increased quality.
